Page 1

forged steel flanges


1. Holes accurately drilled for ease of assembly. 2. Spot facing ensures seating of fasteners true and square. 3. Grain flow controlled for maximum strength. 4. Smooth accurate bore for unrestricted flow. 5. Machined bevel and land facilitate good welding. 6. All faces machined within tolerances to ensure true alignment. 7. Full identification of size, pressure class, material and heat code. •2•


forged steel flanges index flanges class 150 (PN20) to CLASS 2500 (PN 420) Welding Neck, Slip-on, Threaded, Socket Welding Lap Joint, Blind....................................................................................................Page 36

reducing flanges Welding Neck, Threaded, Slip-on........................................................................Page 18

orifice flanges class 300 - 1500 (pn 50-250) Welding Neck, Slip-on, Threaded........................................................................Page 24

long welding necks............................................................................................Page 33

large diameter flanges Class 125 LW Slip-on..........................................................................................Page Class 125 Welding Neck, Slip-on, Blind..............................................................Page Class 250.............................................................................................................Page Class 75...............................................................................................................Page Class 175.............................................................................................................Page Class 350.............................................................................................................Page AWWA Class B, D, E, Slip-on..............................................................................Page Class 150 Series A ASME B16.47.......................................................................Page Class 150 Series B ASME B16.47.......................................................................Page

34 35 36 37 38 39 40 41 46

engineering and design data Bolt and Stud Dimensions...................................................................................Page 22 Flange Facing Dimensions...................................................................................Page 20 Flange Facing and Finish Data..............................................................................Page 4 Gasket Dimensions..............................................................................................Page 20 Identification, Marking..........................................................................................Page 47 Manufacturing Standards, Specifications..............................................................Page 5 Materials.................................................................................................................Page 5 Ring Joint Dimensions.........................................................................................Page 30 Tolerances............................................................................................................Page 47 Welding Bevels.....................................................................................................Page 48

•3•


flange types, facings and finishes ansi flanges

Most forged steel flanges correspond to the requirements of the American Standards Association (ASME/ANSI Standard B16.5) and the ASTM Specification A-105. The following types are manufactured and stocked: Welding Neck flanges, available in all pressure ratings and sizes, are butt-welded to the end of the pipe, and are usually specified when service conditions are severe and excellent workmanship necessary. Since the inside diameter of the flange must match that of the pipe, the flange bore should be specified in ordering. Slip-on flanges, also available in most pressure ratings and sizes, are a popular type due to their ease of application. This flange slips over the end of the pipe and is usually set so that the flange face is about .375" (9.5mm) beyond the end of the pipe. This permits double-welding of the flange - one strength fillet weld to join the hub of the flange to the pipe, and a seal fillet weld inside the flange at the end of the pipe. Where operating conditions permit, the seal weld is omitted. Slip-on flanges are most frequently used at lower pressure - Class 150 (PN 20) or Class 300 (PN 50) primary service pressure ratings. Many pipe designers are reluctant to use slip-ons for higher pressures, since (1) the joint between the flange and pipe is not as strong as in the welding neck type; and (2) the junction of the flange and pipe is more susceptible to corrosion. Screwed or Threaded flanges are attached to the pipe like any other screwed fittings, and may be back-welded to seal the joint between pipe and flange. Although still available in most sizes and pressure ratings, screwed fittings today are used almost exclusively in smaller pipe sizes and at low pressures. Lap Joint or Van Stone flanges are used on piping equipped with lap joint stub ends or with lapped pipe. They may be used at all pressures and are available in a full size range. These flanges slip over the pipe, and are not welded or otherwise fastened to it; bolting pressure is transmitted to the gasket by the pressure of the flange against the back of the pipe lap. Lap Joint flanges have certain special advantages: (1) freedom to swivel around the pipe facilitates the lining up of opposing flange bolt holes; (2) lack of contact with the fluid in the pipe often permits the use of inexpensive carbon steel flanges with corrosion resistant pipe or tubing; (3) in systems which erode or corrode quickly, the flanges may be salvaged for re-use. Socket-welding flanges contain a recess in the back of the flange to receive the end of the pipe, which is attached by a fillet weld around the hub of the flange. Since socket-welding connections are not as strong as butt-welded joints, the use of this type of flange is almost always confined to NPS 4 (DN 100) and smaller sizes, and to the lower pressure ratings. Its chief advantage lies in the ease of preparation and installation. Blind flanges, available in all sizes and pressure ratings, are solid forgings used to close off the end of a piping system and to gain easy access to the interior of the line. Reducing flanges are available. Refer to page 18.

flange facings

Unless otherwise specified, Class 150 (PN 20) and Class 300 (PN 50) flanges in all types except lap joint (or Van Stone) flanges are furnished with a .06" (1.6mm) raised face (which is included in the flange thickness dimension). Heaver pressure ratings are machined with a .25" (6.4 mm) raised face, in addition to the designated flange thickness. When so ordered, these flange types can be furnished with a variety of other facings, such as male and female, ring joint, tongue and groove, etc. Lap Joint flanges are machined with a flat face and a fillet radius to accommodate the stub end or pipe lap.

flange finishes

The finish of contact faces of pipe flanges and connecting end flanges of fittings shall be judged by visual comparison with AARH Standards and not by instruments having stylus tracers and electronic amplification (see ANSI/ASME B46.1) The finishes required are given below. Other finishes may be furnished upon application. Raised face and large male and female: Either a serrated-concentric or serrated-spiral finish having from 45 to 55 grooves per inch (0.6 to 1mm pitch) shall be used. The cutting tool employed shall have an approximate 0.06" (1.6mm) or larger radius. The resultant surface shall have a 125 to 250 microinch roughness. tongue and groove and small male and female: The gasket contact shall not exceed 125 microinch roughness. ring joint: The side wall surface of gasket groove shall not exceed 63 microinch roughness.

other types

In addition to the ANSI flanges, the following types are carried in stock: Orifice flanges are used for measuring fluid flow in piping systems. Their design conforms to the recommendations of the American Gas Association’s Committee on Gas Measurement. Commonly furnished as either welding neck or slip-on type, they may also be ordered as screwed flanges. Orifice unions are available in Class 300 (PN 50) and heavier pressure ratings. Each Orifice flange is equipped with two radially-drilled, tapped holes for metering, and with jack-screws to facilitate separation of the joint for removal of the orifice metering plate. Orifice flanges, unless otherwise specified, are furnished in pairs as a flange union, complete with bolts, nuts and jack-screws - but without the orifice plate. Gaskets are supplied with raised face flange unions, but not for ring-joint faced flanges, which use an integral gasket and orifice plate. Light Weight Slip-on flanges, drilled to Class 125 ANSI Standards but of lighter construction than the regular slip-on type, are available for low-pressure systems. Large Diameter flanges, in sizes beyond the B16.5 range, are available for special installations. Dimensions given herein are those most commonly used; however, flanges and rolled rings for large diameter pipe or for vessels and tanks can readily be made to other specifications. Long Welding Necks are used primarily for outlets for vessels and tanks. Drilled to ANSI Standards, they are forged with long, heavy-wall, straight hubs, and finished with square cut ends.

•4•


material and manufacturing standards The manufacturing of forged steel flanges is governed by industry standards written by (1) the American Society for Testing and Materials (ASTM); (2) the American National Standards Institute (ANSI); (3) the Manufacturer’s Standardization Society of the Valve and Fittings Industry (MSS); (4) the American Petroleum Institute (API); (5) the Canadian Standards Association (CSA); (6) the American Society of Mechanical Engineers (ASME); and (7) the Pipe Fabrication Institute (PFI). They cover specifications for materials, methods of manufacture, dimensions and quality control procedures. WESTLUND forged steel flanges conform to all applicable standards.

ASTM specifications

ASTM specifications are, basically, materials specifications. They regulate approved raw materials from which flanges can be made - ingots, or blooms, billets, slabs or bars. In addition, they govern the methods of manufacture, quality control procedures and markings of forged steel flanges. ASTM specifications are divided into five categories: A105 - Carbon grades for high temperature service A181 - Carbon grades for general service * A182 - Alloy and stainless grades for high temperature service A350 - Carbon and alloy grades for low temperature service *WESTLUND flanges are available in a wide range of alloy and stainless steels, including grades F304, F304L, F316, F316L. Please refer to WESTLUND catalogue “Stainless Steel Flanges” for the popular Classes 150 and 300 (PN 20 and 50).

mss, api, awwa, ansi and csa standards

ANSI, MSS and API standards govern flange dimensions and tolerances. ASME/ANSI B16.5, titled “Steel Pipe Flanges and Flanged Fittings”, is the basic standard. It covers forged steel flanges, sizes NPS 1/2 (DN 15) through NPS 24 (DN 600). CSA standard CAN3-Z245 12-M96 covers the manufacture, dimensions, tolerances and material requirements for pipe line flanges. ASME/ANSI B16.36 covers Orifice flanges. The following MSS, API and AWWA standards are written to supplement B16.5: MSS SP-6: Flange facings MSS SP-9: Spot facing for bronze, iron and steel flanges MSS SP-25: Marking of flanges MSS SP-39: Bolts and nuts for flanges API6A: Wellhead equipment AWWA C207: Hub flanges The

following codes are not flange specifications, but they influences the manufacture of forged steel flanges: ASME: Boiler and Pressure Vessel Code ASME/ANSI B31.1: Power Piping ASME/ANSI B31.3: Petroleum and refinery piping ASME/ANSI B31.4: Liquid petroleum transportation piping systems ASME/ANSI B31.5: Refrigeration piping ASME/ANSI B31.8: Gas transmission and distribution piping systems ANSI/ASME B36.10M: Standard for wrought steel pipe ANSI/ASME B36.19M: Standard for stainless steel pipe ANSI/ASME B16.47: Large diameter pipe line flanges NPS 22 (DN 550) and NPS 26 (DN 650) through NPS 36 (DN900)

Metric equivalents

The International System (SI) NPS (Nominal Pipe Size) Operating Pressure Class 1 inch 1 pound, weight 1 pound, pressure 1 p.s.i., stress

metric equivalent of British units are shown throughout this catalogue. = DN* (Nominal Diameter) = PN* (Pressure Number) = 25.4 millimetres = 0.4536 kilograms = 0.06895 bars = 0.006895 megapascals (MPa)

*From the SI designations, Diamètre Nominal and Pression Nominale.

•5•


nps DN 1/2 15 3/4 20 1 25 1 1/4 32 1 1/2 40 2 50 2 1/2 65 3 80 3 1/2 90 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600

flange outside diameter O 3.50 89 3.88 98 4.25 108 4.62 117 5.00 127 6.00 152 7.00 178 7.50 191 8.50 216 9.00 229 10.00 254 11.00 279 13.50 343 16.00 406 19.00 483 21.00 535 23.50 595 25.00 635 27.50 700 32.00 815

flange thickness min. t .44 11.5 .50 13.0 .56 14.5 .62 16.0 .69 17.5 .75 19.5 .88 22.5 .94 24.0 .94 24.0 .94 24.0 .94 24.0 1.00 25.5 1.12 29.0 1.19 30.5 1.25 32.0 1.38 35.0 1.44 37.0 1.56 40.0 1.69 43.0 1.88 48.0 2

welding neck & raised socket face welding dia. b a 1.38 .62 34.9 15.8 1.69 .82 42.9 20.8 2.00 1.05 50.8 26.7 2.50 1.38 63.5 35.1 2.88 1.61 73.0 40.9 3.62 2.07 92.1 52.6 4.12 2.47 104.8 62.7 5.00 3.07 127.0 78.0 5.50 3.55 139.7 90.2 61.9 4.03 157.2 102.4 7.31 5.05 185.7 128.3 8.50 6.07 215.9 154.2 10.62 7.98 269.9 202.7 12.75 10.02 323.8 254.5 15.00 12.00 381.0 304.8 16.25 412.8 To be 18.50 469.9 specified 21.00 533.4 by 23.00 584.2 purchaser 27.25 692.2 3

bore slip-on & socket weld socket min. c .88 22.2 1.09 27.8 1.36 34.5 1.70 43.2 1.95 49.5 2.44 61.9 2.94 74.6 3.57 90.7 4.07 103.4 4.57 116.1 5.66 143.7 6.72 170.7 8.72 221.5 10.88 276.2 12.88 327.0 14.14 359.2 16.16 410.4 18.18 461.8 20.20 513.1 24.25 615.9

length tru hub lap joint min. d .90 22.9 1.11 28.2 1.38 34.9 1.72 43.7 1.97 50.0 2.46 62.5 2.97 75.4 3.60 91.4 4.10 104.1 4.60 116.8 5.69 144.5 6.75 171.4 8.75 222.2 10.92 277.4 12.92 328.2 14.18 360.2 16.19 411.2 18.20 462.3 20.25 514.3 24.25 615.9

welding neck f 1.88 47.6 2.06 52.4 2.19 55.6 2.25 57.1 2.44 61.9 2.50 63.5 2.75 69.8 2.75 69.8 2.81 71.4 3.00 76.2 3.50 88.9 3.50 88.9 4.00 101.6 4.00 101.6 4.50 114.3 5.00 127.0 5.00 127.0 5.50 139.7 5.69 144.5 6.00 152.4

slip-on, threaded & sock. weld G .62 16 .62 16 .69 17 .81 21 .88 22 1.00 25 1.12 29 1.19 30 1.25 32 1.31 33 1.44 36 1.56 40 1.75 44 1.94 49 2.19 56 2.25 57 2.50 64 2.69 68 2.88 73 3.25 83

2

lap joint H .62 16 .62 16 .69 17 .81 21 .88 22 1.00 25 1.12 29 1.19 30 1.25 32 1.31 33 1.44 36 1.56 40 1.75 44 1.94 49 2.19 56 3.12 79 3.44 87 3.81 97 4.06 103 4.38 111

1

Socket Welding Flanges, sizes NPS 3 1/2 (DN 90) and larger are not covered by ASME/ANSI B16.5. 2 Includes .06" (1.6 mm) raised face. 3 These dimensions correspond to inside diameters of pipe as given in ANSI/ASME B36.10M for Standard Wall Pipe. Thickness of Standard Wall is the same as Schedule 40 in size NPS 10 (DN 250) and smaller.

•6•

inches millimetres


class 150 (Pn20) flanges forged steel astm a-105 asme/ansi b16.5

1

drilling

diameter of hub depth of socket 1

nps DN 1/2 15 3/4 20 1 25 1 1/4 32 1 1/2 40 2 50 2 1/2 65 3 80 3 1/2 90 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600

no. of holes

4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 8 8 8 8 8 8 8 8 8 8 12 12 12 12 12 12 16 16 16 16 20 20 20 20

dia. of holes J .62 16 .62 16 .62 16 .62 16 .62 16 .75 20 .75 20 .75 20 .75 20 .75 20 .88 23 .88 23 .88 23 1.00 26 1.00 26 1.12 29 1.12 29 1.25 32 1.25 32 1.38 35

dia. of bolt circle K 2.38 60.3 2.75 69.8 3.12 79.4 3.50 88.9 3.88 98.4 4.75 120.6 5.50 139.7 6.00 152.4 7.00 177.8 7.50 190.5 8.50 215.9 9.50 241.3 11.75 298.4 14.25 361.9 17.00 431.8 18.75 476.2 21.25 539.7 22.75 577.8 25.00 635.0 29.50 749.3

L .38 10 .44 11 .50 13 .56 14 .62 16 .69 17 .75 19 .81 21 - - - - - - - - - - - - - - - - - - - - - - - -

at base m 1.19 30.2 1.50 38.1 1.94 49.2 2.31 58.7 2.56 65.1 3.06 77.6 3.56 90.5 4.25 107.9 4.81 122.2 5.31 134.9 6.44 163.5 7.56 192.1 9.69 246.1 12.00 304.8 14.38 365.1 15.75 400.0 18.00 457.2 19.88 504.8 22.00 558.8 26.12 663.6

at chamfer n .84 21.4 1.05 26.6 1.32 33.5 1.66 42.1 1.90 48.3 2.38 60.4 2.88 73.0 3.50 88.9 4.00 101.6 4.50 114.3 5.56 141.3 6.63 168.3 8.63 219.1 10.75 273.0 12.75 323.8 14.00 355.6 16.00 406.4 18.00 457.2 20.00 508.0 24.00 609.6

approximate weight lap joint fillet radius r .12 3 .12 3 .12 3 .19 5 .25 6 .31 8 .31 8 .38 10 .38 10 .44 11 .44 11 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13

slip-on, threaded & welding socket neck welding 1

2 0.9 2 0.9 3 1.4 3 1.4 4 1.8 6 2.7 8 3.6 10 4.5 12 5.4 15 6.8 19 8.6 24 10.9 39 17.7 52 23.6 80 36.3 110 50.0 140 64.0 150 68.0 180 81.6 260 118

1 .05 2 0.9 2 0.9 3 1.4 3 1.4 5 2.3 7 3.2 8 3.6 11 5.0 13 5.9 15 6.8 19 8.6 30 13.6 43 19.5 64 29.0 90 41.0 98 44.5 130 59.0 165 75.0 220 99.8

blind

lap joint

1 0.5 2 0.9 2 0.9 3 1.4 4 1.8 5 2.3 7 3.2 9 4.1 13 5.9 17 7.7 20 9.1 26 11.8 45 20.4 70 31.8 110 49.9 140 63.5 180 81.6 220 99.8 285 129.0 430 195.0

1 0.5 2 0.9 2 0.9 3 1.4 3 1.4 5 2.3 7 3.2 8 3.6 11 5.0 13 5.9 15 6.8 19 8.6 30 13.6 43 19.5 64 29.0 105 47.6 140 63.5 160 72.6 195 88.5 275 125.0

For bevel of Welding Neck, see page 48. Gasket dimensions - page 20. Bolting dimensions - page 22.

pounds kilograms

Flange facing dimensions - page 20.

•7•


nps

DN 1/2 15 3/4 20 1 25 1 1/4 32 1 1/2 40 2 50 2 1/2 65 3 80 3 1/2 90 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600

flange outside diameter O 3.75 95 4.62 117 4.88 124 5.25 133 6.12 156 6.50 165 7.50 191 8.25 210 9.0 229 10.0 254 11.0 279 12.5 318 15.0 381 17.5 445 20.5 520 23.0 585 25.5 650 28.0 710 30.5 775 36.0 915

flange thickness min. t .56 14.5 .62 16.0 .69 17.5 .75 19.5 .81 21.0 .88 22.5 1.00 25.5 1.12 29.0 1.19 30.5 1.25 32.0 1.38 35.0 1.44 37.0 1.62 41.5 1.88 48.0 2.00 51.0 2.12 54.0 2.25 57.5 2.38 60.5 2.50 63.5 2.75 70.0 2

welding neck & raised socket face welding dia. b a 1.38 .62 34.9 15.8 1.69 .82 42.9 20.8 2.00 1.05 50.8 26.6 2.50 1.38 63.5 35.1 2.88 1.61 73.0 40.9 3.62 2.07 92.1 52.6 4.12 2.47 104.8 62.7 5.00 3.07 127.0 77.9 5.50 3.55 139.7 90.1 6.19 4.03 157.2 102.3 7.31 5.05 185.7 128.2 8.50 6.07 215.9 154.1 10.62 7.98 269.9 202.7 12.75 10.02 323.8 254.5 15.00 12.00 381.0 304.8 16.25 412.8 To be 18.50 469.9 specified 21.00 533.4 by 23.00 584.2 purchaser 27.25 692.2 3

bore slip-on & socket weld socket min. c .88 22.2 1.09 27.8 1.36 34.5 1.70 43.3 1.95 49.6 2.44 61.9 2.94 74.6 3.57 90.7 4.07 103.4 4.57 116.1 5.66 143.7 6.72 170.7 8.72 221.5 10.88 276.2 12.88 327.0 14.14 359.2 16.16 410.4 18.18 461.8 20.20 513.1 24.25 615.9

length thru hub threaded lap counterjoint bore min. min. d e .90 .93 22.9 23.5 1.11 1.14 28.2 29.0 1.38 1.41 34.9 36.0 1.72 1.75 43.7 44.5 1.97 1.99 50.0 50.5 2.46 2.50 62.5 63.5 2.97 3.00 75.4 76 3.60 3.63 91.4 92 4.10 4.13 104.1 105 4.60 4.63 116.8 118 5.69 5.69 144.5 145 6.75 6.75 171.4 171 8.75 8.75 222.2 222 10.92 10.88 277.4 276 12.92 12.94 328.2 329 14.18 14.19 360.2 360 16.19 16.19 411.2 411 18.20 18.19 462.3 462 20.25 20.19 514.3 513 24.25 24.19 615.9 614

welding neck f 2.06 52.4 2.25 57.1 2.44 61.9 2.56 65.1 2.69 68.3 2.75 69.8 3.00 76.2 3.12 79.4 3.19 81.0 3.38 85.7 3.88 98.4 3.88 98.4 4.38 111.1 4.62 117.5 5.12 130.2 5.62 142.9 5.75 146.0 6.25 158.7 6.38 161.9 6.62 168.3

slip-on, threaded & sock. weld G .88 22 1.00 25 1.06 27 1.06 27 1.19 30 1.31 33 1.50 38 1.69 43 1.75 44 1.88 48 2.00 51 2.06 52 2.44 62 2.62 67 2.88 73 3.00 76 3.25 83 3.50 89 3.75 95 4.19 106

2

lap joint H .88 22 1.00 25 1.06 27 1.06 27 1.19 30 1.31 33 1.50 38 1.69 43 1.75 44 1.88 48 2.00 51 2.06 52 2.44 62 3.75 95 4.00 102 4.38 111 4.75 121 5.12 130 5.50 140 6.00 152

1

Socket Welding Flanges, sizes NPS 3 1/2 (DN 90) and larger are not covered by ASME/ANSI B16.5. 2 Includes .06" (1.6 mm) raised face. 3 These dimensions correspond to inside diameters of pipe as given in ANSI/ASME B36.10M for Standard Wall Pipe. Thickness of Standard Wall is the same as Schedule 40 in size NPS 10 (DN 250) and smaller.

•8•

inches millimetres


class 300 (Pn50) flanges 1

drilling

diameter of hub depth of socket 1

nps DN 1/2 15 3/4 20 1 25 1 1/4 32 1 1/2 40 2 50 2 1/2 65 3 80 3 1/2 90 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600 1

no. of holes

4 4 4 4 4 4 4 4 4 4 8 8 8 8 8 8 8 8 8 8 8 8 12 12 12 12 16 16 16 16 20 20 20 20 24 24 24 24 24 24

dia. of holes J .62 16 .75 20 .75 .20 .75 20 .88 23 .75 20 .88 23 .88 23 .88 23 .88 23 .88 23 .88 23 1.00 26 1.12 29 1.25 32 1.25 32 1.38 35 1.38 35 1.38 35 1.62 42

dia. of bolt circle K 2.62 66.7 3.25 82.5 3.50 88.9 3.88 98.4 4.50 114.3 5.00 127.0 5.88 149.2 6.62 168.3 7.25 184.1 7.88 200.0 9.25 234.9 10.62 269.9 13.0 330.2 15.25 387.3 17.75 450.8 20.25 514.3 22.50 571.5 24.75 628.6 27.00 685.80 32.00 812.80

L .38 10 .44 11 .50 13 .56 14 .62 16 .69 17 .75 19 .81 21 - - - - - - - - - - - - - - - - - - - - - - - -

at base m 1.50 38.1 1.88 47.6 2.12 53.8 2.50 63.5 2.75 69.9 3.31 84.1 3.94 100.0 4.62 117.5 5.25 133.3 5.75 146.0 7.00 177.8 8.12 206.4 10.25 260.3 12.62 320.7 14.75 374.6 16.75 425.5 19.00 482.6 21.00 533.4 23.12 587.4 27.62 701.7

Socket Welding Flanges, sizes NPS 3 1/2 (DN 90) and larger are not covered by ASME/ANSI B16.5.

at chamfer n .84 21.4 1.05 26.6 1.32 33.5 1.66 42.1 1.90 48.3 2.38 60.3 2.88 73.0 3.50 88.9 4.00 101.6 4.50 114.3 5.56 141.3 6.63 168.3 8.63 219.1 10.75 273.0 12.75 323.8 14.00 355.6 16.00 406.4 18.00 457.2 20.00 508.0 24.00 609.6

forged steel astm a-105 asme/ansi b16.5 approximate weight

lap joint fillet radius r .12 3 .12 3 .12 3 .19 5 .25 6 .31 8 .31 8 .38 10 .38 10 .44 11 .44 11 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13

slip-on, threaded & welding socket neck welding 2 2 0.9 0.9 3 3 1.4 1.4 4 3 1.8 1.4 5 4 2.3 1.8 7 6 3.2 2.7 9 7 4.1 3.2 12 10 5.4 4.5 15 13 6.8 5.9 18 17 8.2 7.7 25 22 11.3 10.0 32 28 14.5 12.7 42 39 19.0 17.7 67 58 30.4 26.3 91 81 41.3 36.7 140 115 63.5 52.2 180 165 81.6 74.8 250 190 113 86.2 320 250 145 113 400 315 181 143 580 475 263 215 1

blind 2 0.9 3 1.4 3 1.4 4 1.8 6 2.7 8 3.6 12 5.4 16 7.3 21 9.5 27 12.2 35 15.9 50 22.7 81 36.7 125 56.7 185 83.9 250 113 295 134 395 179 505 229 790 358

lap joint 2 0.9 3 1.4 3 1.4 4 1.8 6 2.7 7 3.2 10 4.5 13 5.9 17 7.7 22 10.0 28 12.7 39 17.7 58 26.3 91 41.3 140 63.5 190 86.2 250 113 295 134 370 168 550 249

For bevel of Welding Neck, see page 48. Gasket dimensions - page 20. Bolting dimensions - page 22.

pounds kilograms

Flange facing dimensions - page 20.

•9•


For sizes NPS 1/2 (DN 15) through NPS 3 1/2 (DN 90) use Class 600 (PN 100) flanges.

1

bore

nps

DN 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600

flange outside diameter O 10 254 11 279 12.5 318 15 381 17.5 445 20.5 520 23 585 25.5 650 28 710 30.5 775 36 915

flange thickness min. t 1.38 35.0 1.50 38.5 1.62 41.5 1.88 48.0 2.12 54.0 2.25 57.5 2.38 60.5 2.5 63.5 2.62 67.0 2.75 70.0 3 76.5 2

raised welding face neck dia. b a 6.19 157.2 7.31 185.7 8.5 215.9 10.62 269.9 To be 12.75 323.8 specified 15.00 381.0 by 16.25 412.8 purchaser 18.50 469.9 21 533.4 23 584.2 27.25 692.2

slip-on, min. c 4.57 116.1 5.66 143.7 6.72 170.7 8.72 221.5 10.88 276.2 12.88 327.0 14.14 359.2 16.16 410.4 18.18 461.8 20.20 513.1 24.25 616.0

length tru hub threaded lap counterjoint bore min. min. d e 4.60 4.63 116.8 118 5.69 5.69 144.5 145 6.75 6.75 171.4 171 8.75 8.75 222.2 222 10.92 10.88 277.4 276 12.92 12.94 328.2 329 14.18 14.19 360.2 360 16.19 16.19 411.2 411 18.20 18.19 462.3 462 20.25 20.19 514.3 513 24.25 24.19 616.0 614

welding neck f 3.5 88.9 4 101.6 4.06 103.2 4.62 117.5 4.88 123.8 5.38 136.5 5.88 149.2 6 152.4 6.5 165.1 6.62 168.3 6.88 174.6

slip-on, threaded G 2 51 2.12 54 2.25 57 2.69 68 2.88 73 3.12 79 3.31 84 3.69 94 3.88 98 4 102 4.5 114

2

lap joint H 2 51 2.12 54 2.25 57 2.69 68 4 102 4.25 108 4.62 117 5 127 5.38 137 5.75 146 6.25 159

1

Including Socket Welding Flanges Does not include .25" (6.4 mm) raised face.

2

inches

• 10 •

millimetres


class 400 (Pn 68) flanges forged steel astm a-105 asme/ansi b16.5

drilling

nps DN 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600

no. of holes

8 8 8 8 12 12 12 12 16 16 16 16 20 20 20 20 24 24 24 24 24 24

diameter of holes J 1 26 1 26 1 26 1.12 29 1.25 32 1.38 35 1.38 35 1.5 39 1.5 39 1.62 42 1.88 48

diameter of hub diameter of bolt circle K 7.88 200.0 9.25 234.9 10.62 269.9 13.0 330.2 15.25 387.3 17.75 450.8 20.25 514.3 22.5 571.5 24.75 628.7 27 685.8 32 812.8

at base m 5.75 146.0 7.0 177.8 8.12 206.4 10.25 260.3 12.62 320.7 14.75 374.7 16.75 425.5 19.0 482.6 21.0 533.4 23.12 587.4 27.62 701.7

at chamfer n 4.50 114.3 5.56 141.3 6.63 168.3 8.63 219.1 10.75 273.0 12.75 323.8 14.00 355.6 16.00 406.4 18.00 457.2 20.00 508.0 24.00 609.6

approximate weight lap joint fillet radius r .44 11 .44 11 .5 13 .5 13 .5 13 .5 13 .5 13 .5 13 .5 13 .5 13 .5 13

welding neck 35 15.8 43 19 57 25.5 89 40 126 57 177 80 233 105 294 132 360 162 445 200 640 288

slip-on, threaded 26 11.7 31 14 44 20 67 30 91 41 129 58 191 86 253 114 310 140 378 170 539 243

blind 33 15 44 20 61 27.5 100 45 155 70 226 102 310 140 398 179 502 226 621 279 936 421

lap joint 25 11.3 29 13 42 19 64 29 112 50 152 68 210 95 280 126 345 155 420 189 615 277

For bevel of Welding Neck, see page 48. Gasket dimensions - page 20. Bolting dimensions - page 22. Flange facing dimensions - page 20.

pounds kilograms

• 11 •


nps

DN 1/2 15 3/4 20 1 25 1 1/4 32 1 1/2 40 2 50 2 1/2 65 3 80 3 1/2 90 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600 1

2

flange outside diameter O 3.75 95 4.62 117 4.88 124 5.25 133 6.12 156 6.5 165 7.5 191 8.25 210 9.0 229 10.75 273 13.0 330 14.0 356 16.5 419 20.0 510 22.0 560 23.75 605 27.0 685 29.25 745 32.0 815 37.0 940

flange thickness min. t .56 14.5 .62 16.0 .69 17.5 .81 21.0 .88 22.5 1.0 25.5 1.12 29.0 1.25 32.0 1.38 35.0 1.5 38.5 1.75 44.5 1.88 48.0 2.19 55.5 2.5 63.5 2.62 66.5 2.75 70.0 3.0 76.5 3.25 83.0 3.5 89.0 4.0 102.0 2

welding neck & raised socket face welding dia. b a 1.38 34.9 1.69 42.9 2.0 50.8 2.5 63.5 2.88 73.0 3.62 92.1 4.12 104.8 5.0 127.0 5.5 To be 139.7 6.19 specified 157.2 7.31 by 185.7 8.5 purchaser 215.9 10.62 269.9 12.75 323.8 15.0 381.0 16.25 412.8 18.5 469.9 21.0 533.4 23.0 584.2 27.25 692.2 1

1

bore slip-on & sock. weld. socket min. c .88 22.2 1.09 27.8 1.36 34.5 1.70 43.3 1.95 49.6 2.44 61.9 2.94 74.6 3.57 90.7 4.07 103.4 4.57 116.1 5.66 143.7 6.72 170.7 8.72 221.5 10.88 276.2 12.88 327.0 14.14 359.2 16.16 410.4 18.18 461.8 20.20 513.1 24.25 615.9

threaded lap counterjoint bore min. min. d e .90 .93 22.9 23.5 1.11 1.14 28.2 29.0 1.38 1.41 34.9 36.0 1.72 1.75 43.7 44.5 1.97 1.99 50.0 50.5 2.46 2.50 62.5 63.5 2.97 3.00 75.4 76.0 3.60 3.63 91.4 92.0 4.10 4.13 104.1 105 4.60 4.63 116.8 118 5.69 5.69 144.5 145 6.75 6.75 171.4 171 8.75 8.75 22.22 222 10.92 10.88 277.4 276 12.92 12.94 328.2 329 14.18 14.19 360.2 360 16.19 16.19 411.2 411 18.20 18.19 462.3 462 20.25 20.19 514.3 513 24.25 24.19 615.9 614

length tru hub slip-on, threaded welding socket neck welding f G 2.06 .88 52.4 22 2.25 1.00 57.1 25 2.44 1.06 61.9 27 2.62 1.12 66.7 29 2.75 1.25 69.8 32 2.88 1.44 73.0 37 3.12 1.62 79.4 41 3.25 1.81 82.5 46 3.38 1.94 85.7 49 4.0 2.12 101.6 54 4.5 2.38 114.3 60 4.62 2.62 117.3 67 5.25 3.0 133.3 76 6.0 3.38 152.4 86 6.12 3.62 155.6 92 6.5 3.69 165.1 94 7.0 4.19 177.5 106 7.25 4.62 184.1 117 7.5 5.0 190.5 127 8.0 5.5 203.2 140 1

2

lap joint H .88 22 1.0 25 1.06 27 1.12 29 1.25 32 1.44 37 1.62 41 1.81 46 1.94 49 2.12 54 2.38 60 2.62 67 3.0 76 4.38 111 4.62 117 5.0 127 5.5 140 6.0 152 6.4 165 7.25 184

Socket Welding Flanges, sizes NPS 3 1/2 (DN 90) and larger are not covered by ASME/ANSI B16.5. Does not include .25" (6.4 mm) raised face.

inches

• 12 •

millimetres


class 600 (Pn 100) flanges 1

drilling

diameter of hub depth of socket 1

nps DN 1/2 15 3/4 20 1 25 1 1/4 32 1 1/2 40 2 50 2 1/2 65 3 80 3 1/2 90 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600

no. of holes

4 4 4 4 4 4 4 4 4 4 8 8 8 8 8 8 8 8 8 8 8 8 12 12 12 12 16 16 20 20 20 20 20 20 20 20 24 24 24 24

dia. of holes J .62 16 .75 20 .75 .20 .75 20 .88 23 .75 20 .88 23 .88 23 1.0 26 1.0 26 1.12 29 1.12 29 1.25 32 1.38 35 1.38 35 1.50 39 1.62 42 1.75 45 1.75 45 2.0 51

dia. of bolt circle K 2.62 66.7 3.25 82.5 3.5 88.9 3.88 98.4 4.5 114.3 5.0 127.0 5.88 149.2 6.62 168.3 7.25 184.1 8.5 215.9 10.5 266.7 11.5 292.1 13.75 349.2 17.0 431.8 19.25 488.9 20.75 527.0 23.75 603.2 25.75 654.0 28.5 723.9 33.0 838.2

L .38 10 .44 11 .50 13 .56 14 .62 16 .69 17 .75 19 .81 21 - - - - - - - - - - - - - - - - - - - - - - - -

at base m 1.5 38.1 1.88 47.6 2.12 54.0 2.5 63.9 2.75 69.8 3.31 84.1 3.94 100.0 4.62 117.5 5.25 133.3 6.0 152.4 7.44 188.9 8.75 222.2 10.75 273.0 13.5 342.9 15.75 400.0 17.0 431.8 19.5 495.2 21.5 546.1 24.0 609.6 28.25 717.5

at chamfer n .84 21.4 1.05 26.6 1.32 33.5 1.66 42.1 1.90 48.3 2.38 60.3 2.88 73.0 3.50 88.9 4.00 101.6 4.50 114.3 5.56 141.3 6.63 168.3 8.63 219.1 10.75 273.0 12.75 323.8 14.0 355.6 16.0 406.4 18.0 457.2 20.0 508.0 24.0 609.6

forged steel astm a-105 asme/ansi b16.5 approximate weight

lap joint fillet radius r .12 3 .12 3 .12 3 .19 5 .25 6 .31 8 .31 8 .38 10 .38 10 .44 11 .44 11 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13

slip-on, threaded & welding socket neck welding 2 2 0.9 0.9 4 3 1.8 1.4 4 4 1.8 1.8 6 5 2.7 2.3 8 7 3.6 3.2 12 9 5.4 4.1 18 13 8.2 5.9 23 16 10.4 7.3 26 21 11.8 9.5 42 37 19.0 16.8 68 63 31.0 28.6 81 80 36.7 36.3 120 115 54.4 52.2 190 170 86.2 77.1 225 200 102 90.7 280 230 127 104 390 330 177 150 475 400 215 181 590 510 268 231 830 730 376 331 1

blind 2 0.9 3 1.4 4 1.8 5 2.3 8 3.6 10 4.5 15 6.8 20 9.1 29 13.2 41 18.6 68 30.8 86 39.0 140 63.5 230 104 295 134 355 161 495 225 630 286 810 367 1250 567

lap joint 2 0.9 3 1.4 4 1.8 5 2.3 7 3.2 9 4.1 12 5.4 15 6.8 20 9.1 36 16.3 61 27.7 78 35.4 110 49.9 170 77.2 200 90.7 250 113 365 166 435 197 570 259 810 367

For bevel of Welding Neck, see page 48. Gasket dimensions - page 20. Bolting dimensions - page 22. Flange facing dimensions - page 20.

pounds kilograms

• 13 •


For sizes NPS 1/2 (DN 15) through NPS 2 1/2 (DN 65) use Class 1500 (PN 250) flanges.

1

bore

nps

DN 3 80 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600

flange outside diameter O 9.50 241 11.50 292 13.75 349 15.00 381 18.50 470 21.50 545 24.00 610 25.25 640 27.75 705 31.00 785 33.75 855 41.00 1040

flange thickness min. t 1.50 38.5 1.75 44.5 2.0 51.0 2.19 56.0 2.5 63.5 2.75 70.0 3.12 79.5 3.38 86.0 3.5 89.0 4.0 102.0 4.25 108.0 5.5 140.0 2

raised welding face neck dia. b a 5.00 127.0 6.19 157.2 q 7.31 185.7 8.50 215.9 10.62 To be 269.9 12.75 specified 323.8 15.00 by 381.0 16.25 purchaser 412.8 18.50 469.9 21.00 533.4 23.00 584.2 27.25 692.2

slip-on, min. c 3.57 90.7 4.57 116.1 5.66 143.7 6.72 170.7 8.72 221.5 10.88 276.2 12.88 327.0 14.14 359.2 16.16 410.4 18.18 461.8 20.20 513.1 24.25 615.9

length tru hub threaded lap counterjoint bore min. min. d e 3.60 3.63 91.4 92 4.60 4.63 116.8 118 5.69 5.69 144.5 145 6.75 6.75 171.4 171 8.75 8.75 222.2 222 10.92 10.88 277.4 276 12.92 12.94 328.2 329 14.18 14.19 360.2 360 16.19 16.19 411.2 411 18.20 18.19 462.3 462 20.25 20.19 514.3 513 24.25 24.19 615.9 614

welding neck f 4.00 101.6 4.50 114.3 5.00 127.0 5.50 139.7 67.38 161.9 7.25 184.2 7.88 200.0 8.38 212.7 8.50 215.9 9.00 228.8 9.75 247.6 11.50 292.1

slip-on, threaded G 2.12 54 2.75 70 3.12 79 3.38 86 4.00 102 4.25 108 4.62 117 5.12 130 5.25 133 6.00 152 6.25 159 8.00 203

2

lap joint H 2.12 54 2.75 70 3.12 79 3.38 86 4.50 114 5.00 127 5.62 143 6.12 156 6.50 165 7.50 191 8.25 210 10.50 267

1

Including Socket Welding Flanges Does not include .25" (6.4 mm) raised face.

2

inches

• 14 •

millimetres


class 900 (Pn 150) flanges forged steel astm a-105 asme/ansi b16.5

For sizes NPS 1/2 (DN 15) through NPS 2 1/2 (DN 65) use Class 1500 (PN 250) flanges. drilling diameter of hub diameter diameter of at at of bolt no. of base chamfer holes nps circle holes m n J DN K 3 8 1.00 7.50 5.00 3.50 80 8 26 190.5 127.0 88.9 4 8 1.25 9.25 6.25 4.50 100 8 32 234.9 158.7 114.3 5 8 1.38 11.00 7.50 5.56 125 8 35 279.4 190.5 141.3 6 12 1.25 12.50 9.25 6.63 150 12 32 317.5 234.9 168.3 8 12 1.50 15.50 11.75 8.63 200 12 39 393.7 298.4 219.1 10 16 1.50 18.50 14.50 10.75 250 16 39 469.9 368.3 273.0 12 20 1.50 21.00 16.50 12.75 300 20 39 533.4 419.1 323.8 14 20 1.62 22.00 17.75 14.00 350 20 42 558.8 450.8 355.6 16 20 1.75 24.25 20.00 16.00 400 20 45 615.9 508.0 406.4 18 20 2.00 27.00 22.25 18.00 450 20 51 685.8 565.1 457.2 20 20 2.12 29.50 24.50 20.00 500 20 54 749.3 622.3 508.0 24 20 2.62 35.50 29.5 24.00 600 20 67 901.7 749.3 609.6 1

approximate weight lap joint fillet radius r .38 10 .44 11 .44 11 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13

welding neck .31 14.1 51 23.1 86 39.0 110 49.9 175 79.4 260 118 325 147 400 181 495 225 680 308 830 376 1500 680

slip-on, threaded 31 14.1 53 24.0 83 37.6 110 49.9 170 77.1 245 111 325 147 400 181 425 193 600 272 730 331 1400 635

blind 31 14.1 54 24.5 87 39.5 115 52.2 200 90.7 290 132 415 188 520 236 600 272 850 386 1075 488 2025 918

lap joint 47 21.3 51 23.1 81 36.7 105 47.6 190 86.2 275 125 370 168 415 188 465 211 650 295 810 367 1550 703

For bevel of Welding Neck, see page 48. Gasket dimensions - page 20. Bolting dimensions - page 22. Flange facing dimensions - page 20.

pounds kilograms

• 15 •


nps

DN 1/2 15 3/4 20 1 25 1 1/4 32 1 1/2 40 2 50 2 1/2 65 3 80 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600 1

2

flange outside diameter O 4.75 121 5.12 130 5.88 149 6.25 159 7.00 178 8.50 216 9.62 244 10.50 267 12.25 311 14.75 375 15.50 394 19.00 483 23.00 585 26.50 675 29.50 750 32.50 825 36.00 915 38.75 985 46.00 1170

flange thickness min. t .88 22.5 1.00 25.5 1.12 29.0 1.12 29.0 1.25 32.0 1.50 38.5 1.62 41.5 1.88 48.0 2.12 54.0 2.88 73.5 3.25 83.0 3.62 92.0 4.25 108.0 4.88 124.0 5.25 133.5 5.75 146.5 6.38 162.0 7.00 178.0 8.00 203.5 2

welding neck & raised socket face welding dia. b a 1.38 34.9 1.69 42.9 2.00 50.8 2.50 63.5 2.88 73.0 3.62 92.1 4.12 104.8 5.00 127.0 To be 6.19 157.2 specified 7.31 185.7 by 8.50 215.9 purchaser 10.62 269.9 12.75 323.8 15.00 381.0 16.25 412.8 18.50 469.9 21.00 533.4 23.00 584.2 27.25 692.2 1

bore slip-on & sock. weld. socket min. c 0.88 22.2 1.09 27.8 1.36 34.5 1.70 43.3 1.95 49.6 2.44 61.9 2.94 74.6 - - - - - - - - - - - - - - - - - - - - - - - - 1

1

threaded lap counterjoint bore min. min. d e .90 .93 22.9 23.5 1.11 1.14 28.2 29.0 1.38 1.41 34.9 36.0 1.72 1.75 43.7 44.5 1.97 1.99 50.0 50.5 2.46 2.50 62.5 63.5 2.97 3.00 75.4 76.0 3.60 3.63 91.4 92.0 4.60 4.63 116.8 118 5.69 5.69 144.5 145 6.75 6.75 171.4 171 8.75 8.75 222.2 222 10.92 10.88 277.4 276 12.92 12.94 328.2 329 14.18 - 360.2 - 16.19 - 411.2 - 18.20 - 462.3 - 20.25 - 514.3 - 24.25 - 615.9 -

length tru hub slip-on, threaded, welding socket neck welding f G 2.38 1.25 60.3 32 2.75 1.38 69.8 35 2.88 1.62 73.0 41 2.88 1.62 73.0 41 3.25 1.75 82.5 44 4.00 2.25 101.6 57 4.12 2.50 104.8 64 4.62 2.88 117.5 73 4.88 3.56 123.8 90 6.12 4.12 155.6 105 6.75 4.69 171.4 119 8.38 5.62 212.7 143 10.00 6.25 254.0 159 11.12 7.12 282.6 181 11.75 - 298.4 - 12.25 - 311.1 - 12.88 - 327.0 - 14.00 - 355.6 - 16.00 - 406.4 -

2

1

1

lap joint H 1.25 32 1.38 35 1.62 41 1.62 41 1.75 44 2.25 57 2.50 64 2.88 73 3.56 90 4.12 105 4.69 119 5.62 143 7.00 178 8.62 219 9.50 241 10.25 260 10.88 276 11.50 292 13.00 330

Socket Welding and Slip-on Flanges, size NPS 3 1/2 (DN 80) and larger are not covered by ASME/ANSI B16.5. Does not include .25" (6.4 mm) raised face.

inches

• 16 •

millimetres


class 1500 (Pn 250) flanges forged steel astm a-105 asme/ansi b16.5

drilling

diameter of hub depth of socket 1

nps DN 1/2 15 3/4 20 1 25 1 1/4 32 1 1/2 40 2 50 2 1/2 65 3 80 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600

no. of holes

4 4 4 4 4 4 4 4 4 4 8 8 8 8 8 8 8 8 8 8 12 12 12 12 12 12 16 16 16 16 16 16 16 16 16 16 16 16

dia. of holes J .88 23 .88 23 1.00 26 1.00 26 1.12 29 1.00 26 1.12 29 1.25 32 1.38 35 1.62 42 1.50 39 1.75 45 2.00 51 2.12 54 2.38 61 2.62 67 2.88 74 3.12 80 3.62 92

dia. of bolt circle K 3.25 82.5 3.50 88.9 4.00 101.6 4.38 111.1 4.88 123.8 6.50 165.1 7.50 190.5 8.00 203.2 9.50 241.3 11.50 292.1 12.50 317.5 15.50 393.7 19.00 482.6 22.50 571.5 25.00 635.0 27.75 704.8 30.50 774.7 32.75 831.8 39.00 990.6

L .38 10 .44 11 .50 13 .56 14 .62 16 .69 17 .75 19 - - - - - - - - - - - - - - - - - - - - - - - -

at base m 1.50 38.1 1.75 44.4 2.06 52.4 2.50 63.5 2.75 69.8 4.12 104.8 4.88 123.8 5.25 133.3 6.38 161.9 7.75 196.8 9.00 228.6 11.50 292.1 14.50 368.3 17.75 450.6 19.50 495.3 21.75 552.4 23.50 569.9 25.25 641.3 30.00 762.0

at chamfer n .84 21.4 1.05 26.6 1.32 33.5 1.66 42.1 1.90 48.3 2.38 60.3 2.88 73.0 3.50 88.9 4.50 114.3 5.56 141.3 6.63 168.3 8.63 219.1 10.75 273.0 12.75 323.8 14.00 355.6 16.00 406.4 18.00 457.2 20.00 508.0 24.00 609.6

approximate weight lap joint fillet radius r .12 3 .12 3 .12 3 .19 5 .25 6 .31 8 .31 8 .38 10 .44 11 .44 11 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13

slip-on, threaded & socket welding welding neck 5 4 2.3 1.8 6 5 2.7 2.3 9 8 4.1 3.6 10 9 4.5 4.1 13 12 5.9 5.4 25 25 11.3 11.3 36 36 16.3 16.3 48 48 21.8 21.8 73 73 33.1 33.1 130 130 59.0 59.0 165 165 75 75 275 260 125 118 455 435 206 197 690 580 313 263 940 - 426 - 1250 - 567 - 1625 - 737 - 2050 - 930 - 3325 - 1510 - 1

1

blind 4 1.8 6 2.7 8 3.6 9 4.1 13 5.9 25 11.3 35 15.9 48 21.8 73 33.1 140 63.5 160 72.6 300 136 510 231 690 313 975 442 1300 590 1750 795 2225 1010 3625 1644

lap joint 4 1.8 5 2.3 8 3.6 9 4.1 12 5.4 25 11.3 35 16.0 47 21.3 75 34.0 140 63.5 170 77.1 285 129 485 220 630 286 890 404 1150 522 1475 669 1775 805 2825 1326

For bevel of Welding Neck, see page 48. Gasket dimensions - page 20. Bolting dimensions - page 22. Flange facing dimensions - page 20.

pounds kilograms

• 17 •


bore welding slip-on & threaded neck & flange sock. weld. raised lap countersocket outside socket face joint bore flange welding nps diameter thickness min. dia. min. min. b t DN O c a d e 1/2 5.25 1.19 1.38 0.88 .90 0.93 15 133 30.5 34.9 22.2 22.9 23.5 3/4 5.50 1.25 1.69 1.09 1.11 1.14 20 140 32.0 42.9 27.8 28.2 29.0 1 6.25 1.38 2.00 1.36 1.38 1.41 25 159 35.0 50.8 34.5 34.9 36.0 1 1/4 7.25 1.50 2.50 1.70 1.72 1.75 32 184 38.5 63.5 43.3 43.7 44.5 1 1/2 8.00 1.75 2.88 1.95 1.97 1.99 40 203 44.5 73.0 49.6 50.0 50.5 2 9.25 2.00 3.62 2.44 2.46 2.50 To be 50 235 51.0 92.1 61.9 62.5 63.5 2 1/2 10.50 2.25 4.12 2.94 2.97 3.00 specified 65 267 57.5 104.8 74.6 75.4 76 3 12.00 2.62 5.00 3.57 3.60 3.63 by 80 305 67.0 127.0 90.7 91.4 92 4 14.00 3.00 6.19 4.57 4.60 4.63 purchaser 100 356 76.5 157.2 116.1 116.8 118 5 16.50 3.62 7.31 5.66 5.69 5.69 125 419 92.5 185.7 143.7 144.5 145 6 19.00 4.25 8.50 6.72 6.75 6.75 150 483 108.0 215.9 170.7 171.4 171 8 21.75 5.00 10.62 8.72 8.75 8.75 200 552 127.0 269.9 221.5 222.2 222 10 26.50 6.50 12.75 10.88 10.92 10.88 250 675 165.5 323.8 276.2 277.4 276 12 30.00 7.25 15.00 12.88 12.92 12.94 300 760 184.5 381.0 327.0 328.2 329 Dimensions do not include .25" (6.4 mm) raised face. Class 2500 (PN 420) Socket Welding and Slip-on Flanges not covered by ANSI B16.5 2

2

1

2

length tru hub slip-on threaded welding socket neck welding f G 2.88 1.56 73.0 40 3.12 1.69 79.4 43 3.50 1.88 88.9 48 3.75 2.06 95.2 52 4.38 2.38 111.4 60 5.00 2.75 127.0 70 5.62 3.12 142.9 79 6.62 3.62 168.2 92 7.50 4.25 190.5 108 9.00 5.12 228.6 130 10.75 6.0 273.0 152 12.50 7.0 317.5 178 16.50 9.0 419.4 229 18.25 10.0 463.6 254

1

2

2

lap joint H 1.56 40 1.69 43 1.88 48 2.06 52 2.38 60 2.75 70 3.12 79 3.62 92 4.25 108 5.12 130 6.0 152 7.0 178 9.0 229 10.0 254

1

2

reducing flanges asme/ansi b16.5 — Hub dimensions shall be at least as large as those of the standard flanges of the size to which the reduction is being made, except that flanges reduced to a size smaller than those shown in the accompanying table may be used without hubs. For threaded flanges, tapped smaller than the reduced size in the table, Blind Flanges may be used. Flange thickness, outside diameter, drilling template and

facing dimensions, shall be the same as those of a standard flange of the nominal pipe size from which the reduction is being made. Reducing flanges are specified by giving firstly the size from which the reduction is made, followed by the reduced size. Example: NPS 6 x 4 Class 300 reducing threaded flange. (DN 150 x 100, PN 50 reducing threaded flange.) inches

• 18 •

millimetres


class 2500 (Pn 420) flanges* forged steel astm a-105 asme/ansi b16.5

1

drilling

nps DN 1/2 15 3/4 20 1 25 1 1/4 32 1 1/2 40 2 50 2 1/2 65 3 80 4 100 5 125 6 150 8 200 10 250 12 300

no. of holes

4 4 4 4 4 4 4 4 4 4 8 8 8 8 8 8 8 8 8 8 8 8 12 12 12 12 12 12

dia. of holes J .88 23 .88 23 1.00 26 1.12 29 1.25 32 1.12 29 1.25 32 1.38 35 1.62 42 1.88 48 2.12 54 2.12 54 2.62 67 2.88 74

diameter of hub dia. of bolt circle K 3.50 88.9 3.75 95.2 4.25 107.9 5.12 130.2 5.75 146.0 6.75 171.4 7.75 196.8 9.00 228.6 10.75 273.0 12.75 323.8 14.50 368.3 17.25 438.1 21.25 539.7 24.38 619.1

2

depth of socket

at base m 1.69 42.9 2.00 50.8 2.25 57.1 2.88 73.0 3.12 79.4 3.75 95.2 4.50 114.3 5.25 133.3 6.50 165.1 8.00 203.2 9.25 234.9 12.00 304.8 14.75 374.8 17.38 441.3

L .38 10 .44 11 .50 13 .56 14 .62 16 .69 17 .75 19.0 - - - - - - - - - - - - - -

at chamfer n .84 21.4 1.05 26.6 1.32 33.5 1.66 42.1 1.90 48.3 2.38 60.3 2.88 73.0 3.50 88.9 4.50 114.3 5.56 141.3 6.63 168.3 8.63 219.1 10.75 273.0 12.75 323.8

approximate weight lap joint fillet radius r .12 3 .12 3 .12 3 .19 5 .25 6 .31 8 .31 8 .38 10 .44 11 .44 11 .50 13 .50 13 .50 13 .50 13

slip-on, threaded & socket welding welding neck 7 7 3.2 3.2 8 8 3.6 3.6 12 11 5.4 5.0 17 16 7.7 7.3 25 22 11.3 10 42 38 19.0 17.2 52 55 23.6 24.9 94 83 42.6 37.6 145 125 65.8 56.7 245 210 111 95.3 380 325 172 147 580 485 263 220 1075 930 488 422 1525 1100 692 499 2

2

blind 7 3.2 8 3.6 11 5.0 17 7.7 23 10.4 39 17.7 56 25.4 86 39 135 61.2 225 102 345 156 530 240 1025 465 1300 590

lap joint 7 3.2 8 3.6 11 5.0 16 7.3 22 10 37 16.8 53 24 80 36.3 120 54.4 205 93.0 315 143 470 213 900 408 1100 499

* Class 2500 (PN 420) Socket Welding and Slip-on Flanges are not covered by ASME/ANSI B16.5. Bevel of Welding Neck, see page 48 Flange facing and gasket dimensions, see page 20. Bolting dimensions, see page 22.

class 150 — 2500 (pn 20 - 420)

Nominal Pipe Size 1 1 1/4 1 1/2 2 2 1/2 3

DN 25 32 40 50 65 80

pounds kilograms

Smallest Size of Reducing Outlet Requiring Hub Flanges 1/2 1/2 1/2 1 1 1/4 1 1/4

Nominal Pipe Size 3 1/2 4 5 6 8 10

DN 90 100 125 150 200 250

Smallest Size of Reducing Outlet Requiring Hub Flanges 1 1/2 1 1/2 1 1/2 2 1/2 3 1/2 3 1/2

Nominal Pipe Size 12 14 16 18 20 24

DN 300 350 400 450 500 600

Smallest Size of Reducing Outlet Requiring Hub Flanges 3 1/2 3 1/2 4 4 4 4

Reducing Flanges are generally supplied as Slip-on or Threaded; however Reducing Welding Neck flanges are available by special order.

• 19 •


flange facing and gasket dimensions raised face, flat face, lap joint gasket dimensions

cl. 150 1.88 48 2.25 57 2.62 67 3.00 76 3.38 86 4.12 105 4.88 124 5.38 137 6.38 162 6.88 175 7.75 197 8.75 222 11.00 279 13.38 340 16.12 410 17.75 451 20.25 515 21.62 550 23.88 605 28.25 718

cl. 300 2.12 54 2.62 67 2.88 73 3.25 83 3.75 95 4.38 111 5.12 130 5.88 149 6.50 165 7.12 181 8.50 216 9.88 251 12.12 308 14.25 362 16.62 422 19.12 486 21.25 540 23.50 595 25.75 655 30.5 775

flat ring type gasket (extending to insides of bolts) outside diameter cl. 400 cl. 600 cl. 900 2.12 2.12 2.50 54 54 64 2.62 2.62 2.75 67 67 70 2.88 2.88 3.12 73 73 79 3.25 3.25 3.50 83 83 89 3.75 3.75 3.88 95 95 98 4.38 4.38 5.62 111 111 143 5.12 5.12 6.50 130 130 165 5.88 5.88 6.62 149 149 168 6.38 6.38 - 162 162 - 7.00 7.62 8.12 178 194 206 8.38 9.50 9.75 213 241 248 9.75 10.50 11.38 248 267 289 12.00 12.62 14.12 305 321 359 14.12 15.75 17.12 359 400 435 16.50 18.00 19.62 419 457 498 19.00 19.38 20.50 483 492 520 21.12 22.25 22.62 537 565 575 23.38 24.12 25.12 595 615 640 25.50 26.88 27.50 648 685 700 30.25 31.12 33.00 770 790 839

Gasket Facing is indicated on the facing drawings by “GF”.

Dimensions conform to ASME/ANSI B16.5 and ANSI B16.21, where applicable.

*

A tolerance of ±0.16" (0.44 mm) is allowed on the inside and outside diameters of all facings.

For Ring Joint dimensions see page 30.

cl. 1500 2.50 64 2.75 70 3.12 79 3.50 89 3.88 98 5.62 143 6.50 165 6.88 175 - - 8.25 210 10.00 254 11.12 2.83 13.88 352 17.12 435 20.50 520 22.75 580 25.25 640 27.75 705 29.75 755 35.50 902

full face type outside diameter

flat ring or full face types inside diameter

Same as flange outside diameter, see pages 6 - 19.

DN 1/2 15 3/4 20 1 25 1 1/4 32 1 1/2 40 2 50 2 1/2 65 3 80 3 1/2 90 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600

Same as flange outside diameter, see pages 6 - 19.

nps

*flange facing raised face, flat lap joint face o. dia. o. dia. A O 1.38 35 1.69 43 2 51 2.5 64 2.88 73 3.62 92 4.12 105 5 127 5.5 140 6.19 157 7.31 185 8.5 216 10.62 270 12.75 324 15 381 16.25 413 18.5 470 51 21 533 23 584 27.25 692

0.84 21 1.06 27 1.31 33 1.66 42 1.91 49 2.38 60 2.88 73 3.5 89 4 102 4.5 114 5.56 141 6.62 168 8.62 219 10.75 273 12.75 324 14 356 16 407 18 457 20 508 24 610

cl. 2500 2.75 70 3.00 76 3.38 86 4.12 105 4.62 117 5.75 146 6.62 168 7.75 197 - - 9.25 235 11.00 279 12.50 318 15.25 387 18.75 476 21.62 550 - - - - - - - - - -

inches

• 20 •

millimetres


flange facing and gasket dimensions male & female, tongue & groove *flange facings dimensions outside diameter large male; large tongue

large female; large groove

inside diameter

large large tongue; groove; small small small groove tongue groove

gasket dimensions outside diameter inside diameter large male & female. large or large small small large small tongue & male & tongue & male & tongue & groove female groove female groove 1.38 0.72 1.38 0.84 1.00 35 18.3 35.0 21 25 1.69 .94 1.69 1.06 1.31 43 23.8 42.9 27 33 2.00 1.19 1.88 1.31 1.50 51 30.2 47.6 33 38 2.50 1.50 2.25 1.66 1.88 64 38.1 57.2 42 48 2.88 1.75 2.50 1.91 2.12 73 44.4 63.5 49 54 3.62 2.25 3.25 2.38 2.88 92 57.2 82.6 60 73 4.12 2.69 3.75 2.88 3.38 105 68.3 95.2 73 86 5.00 3.31 4.62 3.5 4.25 127 84.1 117.5 89 108 5.50 3.81 5.12 4 4.75 140 96.8 130.2 102 121 6.19 4.31 5.69 4.5 5.19 157 109.5 144.5 114 132 7.31 5.38 6.81 5.56 6.31 185 136.5 173.0 141 161 8.50 6.38 8.00 6.62 7.50 216 161.9 203.2 168 191 10.62 8.38 10.00 8.62 9.38 270 212.7 254.0 219 238 12.75 10.50 12.00 10.75 11.25 324 266.7 304.8 273 286 15.00 12.50 14.25 12.75 13.50 381 317.5 362.0 324 343 16.25 13.75 15.50 14 14.75 413 349.2 393.7 356 375 18.50 15.75 17.62 16 16.75 470 400.0 447.7 407 426 21.00 17.75 20.12 18 19.25 533 450.9 511.2 457 489 23.00 19.75 22.0 20 21.00 584 501.7 558.8 510 535 27.25 23.75 26.25 24 25.25 692 603.3 666.8 610 640

small small small male tongue female nps A b c d e f g h DN 1/2 1.38 0.72 1.38 1.44 0.78 1.44 1.00 0.94 15 35 18.3 35.0 36.5 19.9 36.5 25.4 23.8 3/4 1.69 .94 1.69 1.75 1.00 1.75 1.31 1.25 20 43 23.8 42.9 44.5 25.4 44.4 33.3 31.8 1 2.00 1.19 1.88 2.06 1.25 1.94 1.5 1.44 25 51 30.2 47.6 52.4 31.8 49.2 38.1 36.5 1 1/4 2.50 1.5 2.25 2.56 1.56 2.31 1.88 1.81 32 64 38.1 57.2 65.1 39.7 58.7 47.6 46.0 1 1/2 2.88 1.75 2.50 2.94 1.81 2.56 2.12 2.06 40 73 44.4 63.5 74.6 46.0 65.1 54.0 52.4 2 3.62 2.25 3.25 3.69 2.31 3.31 2.88 2.81 50 92 57.2 82.6 93.7 58.7 84.1 73.0 71.4 2 1/2 4.12 2.69 3.75 4.19 2.75 3.81 3.38 3.31 65 105 68.3 95.2 106.4 69.9 96.8 85.7 84.1 3 5.00 3.31 4.62 5.06 3.38 4.69 4.25 4.19 80 127 84.1 117.5 128.6 85.7 119.1 108.0 106.4 3 1/2 5.50 3.81 5.12 5.56 3.88 5.19 4.75 4.69 90 140 96.8 130.2 141.3 98.4 131.8 120.6 119.1 4 6.19 4.31 5.69 6.25 4.38 5.75 5.19 5.12 100 157 109.5 144.5 158.8 111.1 146.0 131.8 130.2 5 7.31 5.38 6.81 7.38 5.44 6.88 6.31 6.25 125 185 136.5 173.0 187.3 138.1 174.6 160.3 158.8 6 8.50 6.38 8.00 8.56 6.44 8.06 7.5 7.44 150 216 161.9 203.2 217.5 163.5 204.8 190.5 188.9 8 10.62 8.38 10.00 10.69 8.44 10.06 9.38 9.31 200 270 212.7 254.0 271.5 214.3 255.6 238.1 236.5 10 12.75 10.5 12.00 12.81 10.56 12.06 11.25 11.19 250 324 266.7 304.8 325.4 268.3 306.4 285.8 284.2 12 15.0 12.5 14.25 15.06 12.56 14.31 13.5 13.44 300 381 317.5 362.0 382.6 319.1 363.5 342.9 341.3 14 16.25 13.75 15.50 16.31 13.81 15.56 14.75 14.69 350 413 349.2 393.7 414.3 350.8 395.3 374.6 373.1 16 18.5 15.75 17.62 18.56 15.81 17.69 16.75 16.69 400 470 400.0 447.7 471.5 401.6 449.3 425.4 423.9 18 21.0 17.75 20.12 21.06 17.81 20.19 19.25 19.19 450 533 450.9 511.2 535.0 452.4 512.8 489.0 487.4 20 23.0 19.75 22.0 23.06 19.81 22.06 21.0 20.94 500 584 501.7 558.8 585.8 503.2 560.4 533.4 531.8 24 27.25 23.75 26.25 27.41 23.81 26.31 25.25 25.19 600 692 603.3 666.8 693.7 604.8 668.3 641.4 639.8 Gasket Facing is indicated on the facing drawings by “GF”. ∆ * A tolerance of ±0.16" (0.44 mm) is allowed on the inside and outside diameters of all facings. Dimensions conform to ASME/ANSI B16.5 and ANSI B16.21, where inches applicable.

millimetres

• 21 •

For Ring Joint dimensions see page 30.


bolt and stud dimensions* continued on page 23

class 300 (pn 50) flanges length

class 150 (pn 20) flanges length stud bolts .06 dia. of 1.6 bolts raised ring (inches) face joint 1/2 2.50 - 1/2 65 - 1/2 2.50 - 1/2 65 - 1/2 2.75 3.25 1/2 70 85 1/2 2.75 3.25 1/2 70 85 1/2 3.00 3.50 1/2 75 90 5/8 3.25 3.75 5/8 85 95 5/8 3.50 4.00 5/8 90 100 5/8 3.75 4.25 5/8 95 110 5/8 3.75 4.25 5/8 95 110 5/8 3.75 4.25 5/8 95 110 3/4 4.00 4.50 3/4 100 115 3/4 4.00 4.50 3/4 100 115 3/4 4.25 4.75 3/4 110 120 7/8 4.75 5.25 7/8 120 135 7/8 4.75 5.25 7/8 120 135 1 5.25 4.75 1 135 145 1 5.50 6.00 1 140 155 1 1/8 6.00 6.50 1 1/8 150 165 1 1/8 6.25 6.75 1 1/8 160 175 1 1/4 7.00 7.50 1 1/4 180 190

machine Bolts .06 1.6 raised no. of face bolts 2.00 4 50 4 2.25 4 55 4 2.25 4 55 4 2.50 4 65 4 2.50 4 65 4 2.75 8 70 8 3.00 8 75 8 3.25 8 85 8 3.25 8 85 8 3.25 8 85 8 3.25 8 85 8 3.50 12 90 12 3.75 12 95 12 4.00 16 100 16 4.25 16 110 16 4.50 20 115 20 4.75 20 120 20 5.00 24 125 24 5.50 24 140 24 6.00 24 155 24

dia. of bolts (inches) 1/2 1/2 5/8 5/8 5/8 5/8 5/8 5/8 3/4 3/4 5/8 5/8 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 7/8 7/8 1 1 1 1/8 1 1/8 1 1/8 1 1/8 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 1/2 1 1/2

stud bolts .06 1.6 raised ring face joint 2.75 3.00 70 75 3.00 3.50 75 90 3.25 3.75 85 95 3.25 3.75 85 95 3.75 4.25 95 110 3.50 4.25 90 110 4.00 4.75 100 120 4.25 5.00 110 125 4.50 5.25 115 135 4.50 5.25 115 135 4.75 5.50 120 140 5.00 5.75 130 145 5.50 6.25 140 160 6.25 7.00 160 180 6.75 7.50 175 190 7.00 7.75 180 195 7.50 8.25 190 210 7.75 8.50 195 215 8.25 9.00 210 230 9.25 10.25 235 260

class 400 (pn 64) flanges machine Bolts .06 1.6 raised no. of bolts face 2.25 4 55 4 2.50 4 6.5 4 2.75 4 70 4 2.75 4 70 4 3.00 4 75 4 3.00 8 75 8 3.50 8 90 8 3.75 8 95 8 3.75 8 95 8 4.00 8 100 8 4.25 8 110 8 4.25 12 110 12 4.75 12 120 12 5.50 16 140 16 6.00 16 155 16 6.25 20 160 20 6.50 20 165 20 6.75 24 175 24 7.25 24 185 24 8.00 24 205 24

length of stud bolts male & .25 female dia. of 6.4 bolts raised tongue & (inches) face groove 1/2 3.25 3.00 1/2 85 75 5/8 3.50 3.25 5/8 90 85 5/8 3.75 3.50 5/8 95 90 5/8 4.00 3.75 5/8 100 95 3/4 4.25 4.00 3/4 110 100 5/8 4.25 4.00 5/8 110 100 3/4 4.75 4.50 3/4 120 115 3/4 5.00 4.75 3/4 130 120 7/8 5.50 5.25 7/8 140 135 7/8 5.50 5.25 7/8 140 135 7/8 5.75 5.50 7/8 145 140 7/8 6.00 5.75 7/8 155 145 1 6.75 6.50 1 175 165 1 1/8 7.50 7.25 1 1/8 190 185 1 1/4 8.00 7.75 1 1/4 205 195 1 1/4 8.25 8.00 1 1/4 210 205 1 3/8 8.75 8.50 1 3/8 225 215 1 3/8 9.00 8.75 1 3/8 230 225 1 1/2 9.75 9.50 1 1/2 250 240 1 3/4 10.75 10.50 1 3/4 275 265

nps no. of DN bolts 1/2 4 15 4 3/4 4 20 4 1 4 25 4 1 1/4 4 32 4 1 1/2 4 40 4 2 4 50 4 2 1/2 4 65 4 3 4 80 4 3 1/2 8 90 8 4 8 100 8 5 8 125 8 6 8 150 8 8 8 200 8 10 12 250 12 12 12 300 12 14 12 350 12 16 16 400 16 18 16 450 16 20 20 500 20 24 20 600 20 * Length of Stud Bolt does not include the height of the points. Bolt sizes are in inches. Length of Male & Female and Tongue & Groove Stud Bolts are .25" (6.4 mm) less than those for the same size of .25" (6.4 mm) Raised Face Stud Bolts.

• 22 •

ring joint 3.00 75 3.50 90 3.75 95 4.00 100 4.25 110 4.50 115 5.00 130 5.25 135 5.75 145 5.75 145 6.00 155 6.25 160 7.00 180 7.75 195 8.25 210 8.50 215 9.00 230 9.25 235 10.00 255 11.25 285

inches millimetres


bolt and stud dimensions continued class 600 (pn 100) flanges

class 900 (pn 150) flanges

length of stud bolts

nps DN 1/2 15 3/4 20 1 25 1 1/4 32 1 1/2 40 2 50 2 1/2 65 3 80 3 1/2 90 4 100 5 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600

dia. of no. of bolts bolts (inches) 4 1/2 4 1/2 4 5/8 4 5/8 4 5/8 4 5/8 4 5/8 4 5/8 4 3/4 4 3/4 8 5/8 8 5/8 8 3/4 8 3/4 8 3/4 8 3/4 8 7/8 8 7/8 8 7/8 8 7/8 8 1 8 1 12 1 12 1 12 1 1/8 12 1 1/8 16 1 1/4 16 1 1/4 20 1 1/4 20 1 1/4 20 1 3/8 20 1 3/8 20 1 1/2 20 1 1/2 20 1 5/8 20 1 5/8 24 1 5/8 24 1 5/8 24 1 7/8 24 1 7/8

inches millimetres

.25 6.4 raised face 3.25 85 3.50 90 3.75 95 4.00 100 4.25 110 4.25 110 4.75 120 5.00 130 5.50 140 5.75 145 6.50 165 6.75 175 7.75 195 8.50 215 8.75 225 9.25 235 10.00 255 10.75 275 11.50 295 13.00 330

ring joint 3.00 75 3.50 90 3.75 95 4.00 100 4.25 110 4.50 115 5.00 125 5.25 135 5.75 145 6.00 155 6.75 175 7.00 180 7.75 195 8.75 225 9.00 230 9.50 240 10.25 260 11.00 280 11.75 300 13.25 335

class 1500 (pn 250) flanges

class 2500 (pn 420) flanges

length of stud bolts

length of stud bolts

length of stud bolts dia. of no. of bolts bolts (inches) 4 3/4 4 3/4 4 3/4 4 3/4 4 7/8 4 7/8 4 7/8 4 7/8 4 1 4 1 8 7/8 8 7/8 8 1 8 1 8 7/8 8 7/8 - - - - 8 1 1/8 8 1 1/8 8 1 1/4 8 1 1/4 12 1 1/8 12 1 1/8 12 1 3/8 12 1 3/8 16 1 3/8 16 1 3/8 20 1 3/8 20 1 3/8 20 1 1/2 20 1 1/2 20 1 5/8 20 1 5/8 20 1 7/8 20 1 7/8 20 2 20 2 20 2 1/2 20 2 1/2

.25 6.4 raised face 4.25 110 4.50 115 5.00 125 5.00 125 5.50 140 5.75 145 6.25 160 5.75 145 - - 6.75 175 7.50 190 7.75 195 8.75 225 9.25 235 10.00 255 10.75 275 11.25 285 12.75 325 13.50 345 17.25 440

ring joint 4.25 110 4.50 115 5.00 125 5.00 125 5.50 140 5.75 145 6.25 160 6.00 155 - - 7.00 180 7.75 195 7.75 195 9.00 230 9.50 240 10.25 260 11.25 285 11.75 300 13.50 345 14.25 360 18.00 455

dia. of no. of bolts bolts (inches) 4 3/4 4 3/4 4 3/4 4 3/4 4 7/8 4 7/8 4 7/8 4 7/8 4 1 4 1 8 7/8 8 7/8 8 1 8 1 8 1 1/8 8 1 1/8 - - - - 8 1 1/4 8 1 1/4 8 1 1/2 8 1 1/2 12 1 3/8 12 1 3/8 12 1 5/8 12 1 5/8 12 1 7/8 12 1 7/8 16 2 16 2 16 2 1/4 16 2 1/4 16 2 1/2 16 2 1/2 16 2 3/4 16 2 3/4 16 3 16 3 16 3 1/2 16 3 1/2

.25 6.4 raised face 4.25 110 4.50 115 5.00 125 5.00 125 5.50 140 5.75 145 6.25 160 7.00 180 - - 7.75 195 9.75 250 10.25 260 11.50 295 13.25 335 14.75 375 16.00 405 17.50 445 19.50 495 21.50 545 24.50 620

ring joint 4.25 110 450 115 5.00 125 5.00 125 5.50 140 5.75 145 6.25 160 7.00 180 - - 7.75 195 9.75 250 10.50 265 12.00 305 13.75 350 15.50 395 17.00 430 18.50 470 20.50 520 22.50 570 25.75 655

.25 dia. of 6.4 no. of bolts raised bolts (inches) face 4 3/4 5.25 4 3/4 135 4 3/4 5.25 4 3/4 135 4 7/8 5.75 4 7/8 145 4 1 6.25 4 1 160 4 1 1/8 7.00 4 1 1/8 180 8 1 7.25 8 1 185 8 1 1/8 8.00 8 1 1/8 205 8 1 1/4 9.00 8 1 1/4 230 - - - - - - 8 1 1/2 10.25 8 1 1/2 260 8 1 3/4 12.00 8 1 3/4 305 8 2 13.75 8 2 350 12 2 15.25 12 2 390 12 2 1/2 19.50 12 2 1/2 495 12 2 3/4 21.50 12 2 3/4 545

ring joint 5.25 135 5.25 135 5.75 145 6.50 165 7.25 185 7.50 190 8.25 210 9.25 235 10.75 275 12.75 325 14.50 370 16.00 405 20.50 520 22.50 570

* Length of Stud Bolt does not include the height of the points Bolt sizes are in inches. Length of Male & Female and Tongue & Groove Stud Bolts are .25" (6.4 mm) less than those for the same size of .25" (6.4 mm) Raised Face Stud Bolts.

• 23 •


flange thickness raised ring face joint t T

bore

length tru hub welding neck slip-on and threaded ∆

nps

DN

1 25 1 1/4 ■ ■ 32 1 1/2 40 2 50 2 1/2 65 3 80 4 100 5 ■ ■ 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600

flange outside diameter O 4.88 124 5.25 133 6.12 156 6.50 165 7.50 191 8.25 210 10.0 254 11.0 279 12.5 318 15.0 381 17.5 445 20.5 520 23.0 585 25.5 650 28.0 710 30.5 775 36.0 915

1.50 38.5 1.50 38.5 1.50 38.5 1.50 38.5 1.50 38.5 1.50 38.5 1.50 38.5 1.50 38.5 1.50 38.5 1.62 41.5 1.88 48.0 2.00 51.0 2.12 54.0 2.25 57.5 2.38 60.5 2.50 63.5 2.75 70.0

1.25 32.0 1.25 32.0 1.25 32.0 1.25 32.0 1.25 32.0 1.25 32.0 1.25 32.0 1.38 35.0 1.44 36.5 1.62 41.5 1.88 48.0 2.00 51.0 2.12 54.0 2.25 57.5 2.38 60.5 2.50 63.5 2.75 70.0

raised welding face neck diameter a b class 300 (PN 50) 2.00 50.80 2.50 63.50 2.88 73.05 3.62 92.10 4.12 104.80 5.00 127.00 6.19 157.20 7.31 185.70 8.50 215.90 10.62 269.90 12.75 323.90 15.00 381.00 16.25 412.80 18.50 469.90 21.00 533.40 23.00 584.20 27.25 692.20

1.05 26.6 1.38 35.1 1.61 40.9 2.07 52.5 2.47 62.7 3.07 77.9 4.03 102.3 5.05 128.2 6.07 154.1 7.98 202.7 10.02 254.5 12.00 304.8 13.25 336.6 15.25 387.4 17.25 438.2 19.25 489.0 23.25 590.6

c

raised face f

ring joint f

raised face G

ring joint g

1.36 34.5 1.70 43.2 1.95 49.5 2.44 62.0 2.94 74.5 3.57 90.5 4.57 116.0 5.66 143.8 6.72 171.0 8.72 221.0 10.88 276.0 12.88 327.0 14.14 359.0 16.16 410.0 18.18 462.0 20.20 513.0 24.25 616.0

3.25 82.6 3.31 84.1 3.38 85.8 3.38 85.8 3.50 88.9 3.50 88.9 3.62 92.1 4.00 101.6 3.94 100.0 4.38 111.2 4.62 117.5 5.12 130.2 5.62 142.9 5.75 146.1 6.25 158.8 6.38 162.0 6.62 168.3

3.00 76.2 3.06 77.8 3.12 79.4 3.12 79.4 3.25 82.6 3.25 82.6 3.38 85.7 3.88 98.4 3.88 98.4 4.38 111.1 4.62 117.5 5.12 130.2 5.62 142.9 5.75 146.1 6.25 158.8 6.38 161.9 6.62 168.3

1.88 48 1.81 46 1.88 48 1.94 49 2.00 51 2.06 52 2.12 54 2.12 54 2.12 54 2.44 62 2.62 67 2.88 73 3.00 76 3.25 83 3.50 89 3.75 95 4.19 106

1.62 41.3 1.56 39.7 1.62 41.3 1.69 42.9 1.75 44.5 1.81 46.0 1.88 47.6 2.00 50.8 2.06 52.4 2.44 61.9 2.62 66.7 2.88 73.0 3.00 76.2 3.25 82.6 3.50 88.9 3.75 95.3 4.19 106.4

slip-on

#ASME/ANSI B16.36 does not cover Class 300 Threaded Orifice Flanges in sizes above NPS 8 (DN 200). ■ Not included in ASME/ANSI B16.36. *Details of Ring Joint facings are given on page 30. For further details, refer to page 4 “Other types”. ∆ 0.06" (1.6 mm) Raised Face is included in Flange Thickness T, and length through Hub, F & G.

inches

• 24 •

millimetres


class 300 (Pn 50) forged orifice flanges astm a-105 asme/ansi b16.36

drilling

bolting length

nps DN

no. of holes

dia. of holes

dia. of bolt circle

bolt dia. (inches)

raised face

1 25 1 1/4 ■ ■ 32 1 1/2 40 2 50 2 1/2 65 3 80 4 100 5 ■ ■ 125 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20 500 24 600

4 4 4 4 4 4 8 8 8 8 8 8 8 8 8 8 12 12 12 12 16 16 16 16 20 20 20 20 24 24 24 24 24 24

0.69 18 0.69 17.5 0.81 18 0.69 18 0.81 21 0.81 21 0.81 21 0.88 23 0.88 23 1.00 26 1.12 29 1.25 32 1.25 32 1.38 35 1.38 35 1.38 35 1.62 42

3.50 89 3.88 99 4.50 114 5.00 127 5.88 149 6.62 168 7.88 200 9.25 235 10.62 270 13.00 330 15.25 387 17.75 451 20.25 514 22.50 572 24.75 629 27.00 686 32.00 813

5/8 5/8 5/8 5/8 3/4 3/4 5/8 5/8 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 7/8 7/8 1 1 1 1/8 1 1/8 1 1/8 1 1/8 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 1/2 1 1/2

4.00 102 4.00 102 4.25 108 4.00 102 4.25 108 4.25 108 4.25 108 4.25 108 4.25 108 4.50 115 5.50 140 5.50 140 6.00 153 6.50 165 6.50 165 7.00 178 7.50 191

at base m

ring joint class 300 (pn 50) 4.75 2.12 121 54.0 4.75 2.50 121 63.5 5.00 2.75 127 70 4.75 3.31 120 84 5.00 3.94 127 100 5.00 4.62 127 117 5.00 5.75 127 146 5.50 7.00 140 178 5.50 8.12 140 206 6.00 10.25 153 260 6.50 12.62 165 321 7.00 14.75 178 375 7.00 16.75 178 425.5 8.00 19.00 204 483 8.00 21.00 204 535 8.00 23.12 204 585 9.00 27.62 229 700

The tapped metering holes are drilled as follows: 1/2" for sizes NPS 4 (DN 100) and over 3/8" for sizes NPS 3 (DN 80) 1/4" for sizes NPS 1 1/2 (DN 65) and under.

pounds kilograms

diameter of hub

• 25 •

approximate weight welding neck

at chamfer n

raised face

1.32 33.5 1.66 42.2 1.90 48.5 2.38 60.5 2.88 73.0 3.50 89.0 4.50 114.0 5.56 141.2 6.63 168.0 8.63 219.0 10.75 273.0 12.75 324.0 14.00 356.0 16.00 406.0 18.00 457.0 20.00 508.0 24.00 610.0

18 8 21 9.5 28 12.5 33 15 43 19.5 48 21.5 68 30.5 78 35 100 45 155 70 220 99 330 149 425 191 590 266 750 338 910 410 1350 608

slip-on and threaded

ring joint

raised face

ring joint

20 9 23 10.5 30 13.5 36 16 46 21 52 23.5 73 33 89 40 115 52 180 81 255 115 380 171 485 218 660 297 830 374 1025 461 1500 675

15 7 17 7.5 24 11 27 12 36 16 42 19 60 27 69 31 94 42.5 135 61 200 90 280 125 395 178 465 209 610 275 740 336 1125 510

17 7.5 20 9 28 13 31 14 42 19 48 22 66 30 80 36 110 50 160 73 230 104 325 147 450 204 535 243 690 313 840 381 1300 590


class 400 (Pn 68)

flange thickness raised ring face joint t T 1.38 1.38 35.0 35.0 1.50 1.50 38.5 38.1 1.62 1.62 41.5 41.5 1.88 1.88 48.0 48.0 2.12 2.12 54.0 54.0 2.25 2.25 57.5 57.5

bore

length tru hub welding neck slip-on and threaded ∆

nps

DN 4 100 5 ■ ■ 125 6 150 8 200 10 250 12 300

flange outside diameter O 10 254 11 279 12.5 318 15 381 17.5 445 20.5 520

raised welding face neck diameter a b 6.19 157.2 7.31 As 185.7 8.50 specified 215.9 10.62 by 269.9 12.75 purchaser 323.9 15.00 381.0

slip-on c 4.57 116.1 5.66 143.8 6.72 170.7 8.72 221.5 10.88 276.4 12.88 327.2

raised face f 3.5 88.9 4.0 101.6 4.06 103.2 4.62 117.5 4.88 123.5 5.38 136.5

ring joint f 3.5 88.9 4 101.6 4.06 103.2 4.62 117.4 4.88 123.8 5.38 136.5

raised face G 2 50.8 2.12 54.0 2.25 57.2 2.69 68.3 2.88 73.0 3.12 79.4

ring joint g 2 50.8 2.12 54.0 2.25 57.2 2.69 68.3 2.88 73.0 3.12 79.4

class 600 (Pn 100)

flange thickness raised ring face joint t T 1.50 1.50 38.5 38.1 1.75 1.75 44.5 44.5 1.88 1.88 48.0 48.0 2.19 2.19 56.0 56.0 2.50 2.50 63.5 63.5 2.62 2.62 67.0 67.0

bore

length tru hub welding neck slip-on and threaded ∆

nps

DN 4 100 5 ■ ■ 125 6 150 8 200 10 250 12 300

flange outside diameter O 10.75 273 13.00 330 14.00 356 16.50 419 20.00 510 22.00 560

raised welding face neck diameter a b 6.19 157.2 7.31 As 185.7 8.50 specified 215.9 10.62 by 269.9 12.75 purchaser 323.9 15.00 381.0

slip-on c 4.57 116.1 5.66 143.8 6.72 170.7 8.72 221.5 10.88 276.4 12.88 327.2

raised face f 4.00 101.6 4.50 114.3 4.62 117.5 5.25 133.4 6.00 152.4 6.12 155.6

ring joint f 4.00 101.6 4.50 114.3 4.62 117.5 5.25 133.4 6.00 152.4 6.12 155.6

raised face G 2.12 54.0 2.38 60.5 2.62 66.7 3.00 76.2 3.38 85.7 3.62 92.1

ring joint g 2.12 54.0 2.38 60.5 2.62 66.7 3.00 76.2 3.38 85.7 3.62 92.1

∆ .25" (6.4 mm) Raised Face s not included in Flange Thickness T, and Length through Hub F & G. † Flanges size NPS 3 (DN80) and smaller are identical to Class 300 flanges, except for bolting steel specifications, compliance with which then permits their use for these higher Class ratings. ■ Not covered by ASME/ANSI B16.36. # Welding Neck Orifice Flanges in sizes NPS 14 through 24 (DN 350 through 600), as covered by ASME/ANSI B16.36, are available upon application. * Details of Ring Joint facings are given on page 30.

For further details, refer to page 4 “Other types”.

inches

• 26 •

millimetres


class 400 (Pn 68) class 600 (pn 100) forged orifice flanges #

astm a-105 asme/ansi b16.36 asme/ansi b16.36a

drilling

nps DN 4 100 5 ■ ■ 125 6 150 8 200 10 250 12 300

no. of holes

8 8 8 8 12 12 12 12 16 16 16 16

dia. of holes 1 26 1 26 1 26 1.12 29 1.25 32 1.38 35

bolting length dia. of bolt circle 7.88 200.0 9.25 235.0 10.62 269.7 13.0 330.2 15.25 387.3 17.75 450.8

bolt dia. (inches) 7/8 7/8 7/8 7/8 7/8 7/8 1 1 1 1/8 1 1/8 1 1/4 1 1/4

drilling

nps DN 4 100 5 ■ ■ 125 6 150 8 200 10 250 12 300

no. of holes

8 8 8 8 12 12 12 12 16 16 20 20

dia. of holes 1.00 26 1.13 29 1.13 29 1.25 32 1.38 35 1.38 35

raised face 5.5 140 5.75 146 6.25 159 6.75 172 7.5 191 8.0 205

ring joint 6.0 153 6.25 159 6.5 165 7.25 185 8.0 204 8.5 216

bolting length dia. of bolt circle 8.50 216 10.50 267 11.50 292 13.75 349 17.00 432 19.25 489

bolt dia. (inches) 7/8 7/8 1 1 1 1 1 1/8 1 1/8 1 1/4 1 1/4 1 1/4 1 1/4

raised face 6.00 152 5.50 140 7.00 178 7.75 197 8.75 222 9.00 229

ring joint 6.5 165 7.00 178 7.5 191 8.25 210 9.25 235 9.5 241

The tapped metering holes are drilled as follows: 1/2" for sizes NPS 4 (DN 100) and over.

pounds kilograms

• 27 •

diameter of hub at base m 5.75 146.1 7.0 177.8 8.12 206.4 10.25 260.4 12.62 320.7 14.75 374.6

at chamfer n 4.50 114.3 5.56 141.2 6.63 168.4 8.63 219.2 10.75 273.1 12.75 323.8

diameter of hub at base m 6.00 152 7.44 189 8.75 222 10.75 273 13.50 343 15.75 400

at point of welding n 4.50 114 5.56 141 6.63 168 8.63 219 10.75 273 12.75 324

approximate weight welding neck raised face 83 37 99 45 135 61 205 90 300 135 420 189

ring joint 92 41.5 110 50 145 65 225 101 325 146 445 200

slip-on and screwed raised face 65 29 75 34 110 50 165 74 235 106 330 149

ring joint 74 33.5 85 38 120 54 180 81 255 115 355 160

approximate weight welding neck raised face 97 44 115 52 195 89 285 129 450 204 540 245

ring joint 110 50 170 77 210 95 305 138 485 220 580 263

slip-on and threaded raised face 87 39 145 66 190 86 275 125 410 186 490 222

ring joint 98 44 160 72 205 92 295 133 445 200 530 239


class 900 (Pn 150)

For sizes 2 1/2 and smaller, use Class 1500 (pn 250)

flange thickness raised ring face joint t T 1.50 1.50 38.5 38.5 1.75 1.75 44.5 44.5 2.00 2.00 51.0 51.0 2.19 2.19 56.0 56.0 2.50 2.50 63.5 63.5 2.75 2.75 70.0 70.0 3.12 3.12 79.5 79.5

bore

length tHru hub welding neck slip-on and threaded ∆

nps

DN 3 80 4 100 5 ■ ■ 125 6 150 8 200 10 250 12 300

flange outside diameter O 9.50 241 11.50 292 13.75 350 15.00 381 18.50 470 21.50 546 24.00 610

raised welding face neck diameter a b 5.00 127.0 6.19 157.2 As 7.31 185.7 specified 8.50 215.9 by 10.63 270.0 purchaser 12.75 323.9 2 15.00 381.0

slip-on c 3.57 90.7 4.57 116.1 5.66 143.8 6.72 170.7 8.72 221.5 10.88 276.4 12.88 327.2

raised face f 4.00 101.6 4.50 114.3 5.00 127.0 5.50 139.7 6.38 161.9 7.25 184.2 7.88 200.0

ring joint f 4.00 101.6 4.50 114.3 5.00 127 5.50 139.7 6.38 161.9 7.25 184.2 7.88 200.0

raised face G 2.12 54.0 2.75 70.0 3.12 79.4 3.38 85.7 4.00 101.6 4.25 108.0 4.62 117.5

ring joint g 2.12 54.0 2.75 70.0 3.12 79.4 3.38 85.7 4.00 101.6 4.25 108.0 4.62 117.5

class 1500 (Pn 250)

nps

DN 1 25 1 1/4 ■ ■ 32 1 1/2 40 2 50 2 1/2 65 3 80 4 100 5 ■ ■ 125 6 150 8 200 10 250 12 300

flange outside diameter O 5.88 149 6.25 159 7.00 178 8.50 216 9.62 245 10.50 267 12.25 312 14.75 375 15.50 394 19.00 483 23.00 585 26.50 675

flange thickness raised ring face joint t T 1.50 1.50 38.5 38.5 1.38 1.38 34.9 34.9 1.50 1.50 38.5 38.5 1.50 1.50 38.5 38.5 1.62 1.62 41.5 41.5 1.88 1.88 48.0 48.0 2.12 2.12 54.0 54.0 2.88 2.88 73.0 73.0 3.25 3.25 83.0 83.0 3.62 3.62 92.5 92.5 4.25 4.25 108.0 108.0 4.88 4.88 124.0 124.0

bore raised welding face neck diameter a b 2.00 50.8 2.50 63.5 2.88 73.0 3.62 92.1 4.12 As 104.8 5.00 specified 127.0 6.19 by 157.2 7.31 purchaser 185.7 8.50 215.9 10.62 269.9 12.75 323.9 15.00 381.0

# Sizes NPS 14 (DN 350) and larger, on application. † Class 2500 (PN 400) Welding Neck Orifice Flanges, NPS 1 through 12 (DN 25 through 300), as covered by ASME/ANSI B16.36 are available upon application. ■ Not covered by ASME/ANSI B16.36. * Details of Ring Joint facings are given on page 30.

length thru hub welding neck slip-on and threaded slip-on c 1.36 34.5 1.70 43.2 1.95 49.5 2.44 62.0 2.94 74.7 3.57 90.7 4.57 116.1 5.66 143.8 6.72 170.7 8.72 221.5 10.88 276.4 12.88 327.2

raised face f 3.25 82.55 2.88 73.15 3.50 88.90 4.00 101.6 4.12 104.8 4.62 117.5 4.88 123.8 6.12 155.6 6.75 171.4 8.38 212.7 10.00 254.0 11.12 282.6

ring joint f 3.25 82.55 2.88 73.15 3.50 88.90 4.00 101.6 4.12 104.8 4.62 117.5 4.88 123.8 6.12 155.6 6.75 171.4 8.38 212.7 10.00 254.0 11.12 282.6

raised face G 1.88 47.6 1.88 47.6 1.88 47.6 2.25 57.2 2.50 63.5 2.88 73.0 3.56 90.5 4.12 104.8 4.69 119.1 5.62 142.9 6.25 158.8 7.12 181.0

ring joint g 1.75 44.5 1.75 44.5 1.75 44.5 2.25 57.2 2.50 63.5 2.88 73.0 3.56 90.4 4.12 104.8 4.69 119.1 5.62 142.9 6.25 158.8 7.12 181.0

For further details, refer to page 4 “Other types”. ∆ 0.25" (6.4 mm) Raised Face is not included in Flange Thickness T, and Length through Hub F & G.

• 28 •


class 900 (Pn 150) class 1500 (pn 250) forged orifice flanges †

astm a-105 asme/ansi b16.36

drilling

nps DN 3 80 4 100 5 ■ ■ 125 6 150 8 200 10 250 12 300

no. of holes

8 8 8 8 8 8 12 12 12 12 16 16 20 20

dia. of holes 1.00 26 1.25 32 1.38 36 1.25 32 1.50 39 1.50 39 1.50 39

bolting dia. of bolt circle 7.50 191 9.25 235 11.00 279 12.50 318 15.50 394 18.50 470 21.00 533

bolt dia. (inches) 7/8 7/8 1 1/8 1 1/8 1 1/4 1 1/4 1 1/8 1 1/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8

drilling

raised face 6.0 153 7.00 178 7.50 191 7.75 197 9.00 229 9.5 241 10.25 260

diameter of hub ring joint 6.5 165 7.5 191 8.00 204 8.25 210 9.5 241 10.0 254 10.75 273

bolting length

at base m 5.00 127 6.25 159 7.50 191 9.25 235 11.75 298 14.50 368 16.50 419

at point of welding n 3.50 89.0 4.50 114.0 5.56 141.3 6.63 168.0 8.63 219.0 10.75 273.0 12.75 324.0

diameter of hub

approximate weight welding neck raised face 75 34 125 57 205 93 260 118 420 191 610 277 760 345

raised face 6.00 153 5.50 140 6.25 159 6.00

ring joint 6.25 159 5.75 147 6.50 166 6.50

at base m 2.06 52 2.50 64 2.75 70 4.12

at point of welding n 1.32 33.5 1.66 42.2 1.90 48.5 2.38

raised face 29 13 31 14 38 17 63

50 8 26 165 7/8 2 1/2 8 1.12 7.50 1 65 8 29 191 1 3 8 1.25 8.00 1 1/8 80 8 32 203 1 1/8 4 8 1.38 9.50 1 1/4 100 8 35 241 1 1/4 8 1.62 11.50 1 1/2 5 ■ ■ 125 8 42 292 1 1/2 6 12 1.50 12.50 1 3/8 150 12 39 318 1 3/8 8 12 1.75 15.50 1 5/8 200 12 45 394 1 5/8 10 12 2.00 19.00 1 7/8 250 12 51 483 1 7/8 12 16 2.12 22.50 2 300 16 54 572 2 for further details, refer to page 4 “Other types”.

153 6.50 165 7.25 185 8.00 204 9.75 248 10.50 267 11.75 299 13.50 343 15.00 381

166 7.00 178 7.75 197 8.50 216 10.25 261 11.00 280 12.50 318 14.25 362 16.00 407

105 4.88 124 5.25 133 6.38 162 7.75 197 9.00 229 11.50 292 14.50 368 17.75 451

60.5 2.88 73.0 3.50 89.0 4.50 114.0 5.56 141.0 6.63 168.0 8.63 219.0 10.75 273.0 12.75 324.0

29 90 41 120 54 180 82 320 145 405 184 630 286 1100 499 1675 760

no. of holes

4 4 4 4 4 4 8

dia. of holes 1.00 26 1.00 26 1.12 29 1.00

dia. of bolt circle 4.00 102 4.38 111 4.88 124 6.50

inches

pounds

millimetres

kilograms

• 29 •

raised face 65 30 130 59 200 91 260 118 410 186 580 263 760 345

ring joint 74 33 145 65 215 97 285 128 435 196 620 279 820 360

approximate weight welding neck

bolt dia. (inches) 7/8 7/8 7/8 7/8 1 1 7/8

nps DN 1 25 1 1/4 ■ ■ 32 1 1/2 40 2

ring joint 84 38 140 64 225 102 290 132 450 204 660 299 820 372

slip-on and threaded

slip-on and threaded

ring joint 28 13 31 14 40 18 72

raised face 26 12 29 13 36 16 63

ring joint 26 12 29 13 38 17 71

33 100 45 135 61 195 88 345 157 440 200 730 331 1175 533 1825 828

29 90 41 120 54 180 82 320 145 405 184 600 272 1050 476 1475 664

32 100 45 135 61 195 88 340 153 435 196 680 305 1125 506 1550 698

The tapped metering holes are drilled as follows: 1/2" for sizes NPS 4 (DN 100) and over. 3/8" for sizes NPS 3 (DN 80). 1/4" for sizes NPS 2 1/2 (DN 65) and under.


ring joint dimensions

enlarged section of groove

asme/ansi b16.5 nominal pipe size

groove dimensions

ring class 150 300 400 600 900 1500 2500 pn 20 50 64 100 160 250 400 number nps 1/2 1/2 r11 dn 15 15 R11 nps 1/2 R12 dn 15 r12 nps 3/4 3/4 1/2 r13 dn 20 20 15 r13 nps 3/4 r14 dn 20 r14 nps 1 r15 dn 25 r15 nps 1 1 1 3/4 r16 dn 25 25 25 20 r16 nps 1 1/4 r17 dn 32 r17 nps 1 1/4 1 1/4 1 1/4 1 r18 dn 32 32 32 25 r18 nps 1 1/2 r19 dn 40 r19 nps 1 1/2 1/2 1 1/2 r20 dn 40 40 40 r20 nps 1 1/4 r21 dn 32 r21 nps 2 R22 dn 50 r22 nps 2 2 1 1/2 r23 dn 50 50 40 r23 nps 2 r24 dn 50 r24 nps 2 1/2 r25 dn 65 r25 nps 2 1/2 2 1/2 2 r26 dn 65 65 50 r26 nps 2 1/2 r27 dn 65 r27 nps 2 1/2 r28 dn 65 r28 nps 3 r29 dn 80 r29 nps (1) (1) r30 dn (1) (1) r30 nps 3 (1) 3 (1) 3 r31 dn 80 80 80 r31 nps 3 r32 dn 80 r32 2

1

3

For NPS 3 (DN 80) Lap Joint Stub Ends (ASME/ASNI B16.9) Class 300 & 600 (PN 50 & 100), Ring Number R30 is used instead of R31. 2 For sizes NPS 1/2 - NPS 3 1/2 (DN 15 - DN 90), use same data as Class 600 (PN 100). 3 For sizes NPS 1/2 - NPS 2 1/2 (DN 15 - DN 65) use same data as Class 1500 (PN 250). 4 Height of raised portion is equal to the depth of groove dimensions “E” but is not subjected to the tolerance for “E”. Former full-face contour may be used.

diameter of raised face k

pitch bott. dia. depth width radius p 1.344 34.14 1.562 39.67 1.688 42.88 1.750 44.45 1.875 47.62 2.000 50.80 2.250 57.15 2.375 60.32 2.562 65.07 2.688 68.28 2.844 72.24 3.250 82.55 3.250 82.55 3.750 95.25 4.000 101.60 4.000 101.60 4.250 107.95 4.375 111.12 4.500 114.30 4.625 117.48 4.875 123.82 5.000 127.00

e 0.219 5.56 0.250 6.35 0.250 6.35 0.250 6.35 0.250 6.35 0.250 6.35 0.250 6.35 0.250 6.35 0.250 6.35 0.250 6.35 0.312 7.92 0.250 6.35 0.312 7.92 0.312 7.92 0.250 6.35 0.312 7.92 0.312 7.92 0.375 9.52 0.250 6.35 0.312 7.92 0.312 7.92 0.375 9.52 4

f 0.281 7.14 0.344 8.74 0.344 8.74 0.344 8.74 0.344 8.74 0.344 8.74 0.344 8.74 0.344 8.74 0.344 8.74 0.344 8.74 0.469 11.91 0.344 8.74 0.469 11.91 0.469 11.91 0.344 8.74 0.469 11.91 0.469 11.91 0.531 13.49 0.344 8.74 0.469 11.91 0.469 11.91 0.531 13.49

300 150 400,600 900 1500 r 20 50,64,100 160 250 .03 2 .8 51.0 .03 2.38 .8 60.5 .03 2.5 .8 63.5 .03 2.62 .8 66.5 .03 2.50 .8 63.5 .03 2.75 2.81 .8 70.0 71.5 .03 2.88 .8 73.0 .03 3.12 3.19 .8 79.5 81.0 .03 3.25 .8 82.5 .03 3.56 3.62 .8 90.5 92.0 .03 .8 .03 4 .8 102 .03 4.25 .8 108 .03 4.88 .8 124 .03 4.75 .8 121 .03 5 .8 127 .03 5.38 .8 137 .06 1.5 .03 5.25 .8 133 .03 .8 .03 5.75 6.12 .8 146 156 .06 1.5

2500 400

2.56 65.0

2.88 73.0 3.25 82.5

4 102 4.5 114

5.25 133 5.88 149

6.62 168

tolerances E (depth) + 0.16 (+ 0.40 mm) - 0.00 (-0.00 mm) F (width) ± 0.008 (±0.20 mm) P (pitch) ± 0.005 (± 0.13 mm) R (radius) Max. 23˚ (angle) ± 1/2˚

inches

• 30 •

millimetres


ring joint dimensions continued

nominal pipe size

groove dimensions

ring class 150 300 400 600 900 1500 2500 pn 20 50 64 100 160 250 400 number nps 3 1/2 r33 dn 90 R33 nps 3 1/2 3 1/2 R34 dn 90 90 r34 nps 3 r35 dn 80 r35 nps 4 r36 dn 100 r36 nps 4 4 4 4 r37 dn 100 100 100 100 r37 nps 4 r38 dn 100 r38 nps 4 r39 dn 100 r39 nps 5 r40 dn 125 r40 nps 5 5 5 5 r41 dn 125 125 125 125 r41 nps 5 r42 dn 125 r42 nps 6 r43 dn 150 r43 nps 5 R44 dn 125 r44 nps 6 6 6 6 r45 dn 150 150 150 150 r45 nps 6 r46 dn 150 r46 nps 6 r47 dn 150 r47 nps 8 r48 dn 200 r48 nps 8 8 8 8 r49 dn 200 200 200 200 r49 nps 8 R50 dn 200 R50 nps 8 R51 dn 200 R51 nps 10 R52 dn 250 R52 nps 10 10 10 10 R53 dn 250 250 250 250 R53 nps 10 R54 dn 250 R54 nps 10 R55 dn 250 r55 2

3

pitch bott. dia. depth width radius p 5.188 131.78 5.188 131.78 5.375 136.52 5.875 149.22 5.875 149.22 6.188 157.18 6.375 161.92 6.750 171.45 7.125 180.98 7.500 190.50 7.625 193.68 7.625 193.68 8.312 211.12 8.312 211.12 9.000 228.60 9.750 247.65 10.625 269.88 10.625 269.88 11.000 279.40 12.000 304.80 12.750 323.85 12.750 323.85 13.500 342.90

for footnotes, refer to page 30

e 0.250 6.35 0.312 7.92 0.312 7.92 0.250 6.35 0.312 7.92 0.438 11.13 0.312 7.92 0.250 6.35 0.312 7.92 0.500 12.70 0.250 6.35 0.312 7.92 0.312 7.92 0.375 9.52 0.500 12.70 0.250 6.35 0.312 7.92 0.438 11.13 0.562 14.27 0.250 6.35 0.312 7.92 0.438 11.13 0.688 17.48 4

f 0.344 8.74 0.469 11.91 0.469 11.91 0.344 8.74 0.469 11.91 0.656 16.66 0.469 11.91 0.344 8.74 0.469 11.91 0.781 19.84 0.344 8.74 0.469 11.91 0.469 11.91 0.531 13.49 0.781 19.84 0.344 8.74 0.469 11.91 0.656 16.66 0.906 23.01 0.344 8.74 0.469 11.91 0.656 16.66 1.188 30.18

300 150 400,600 900 1500 r 20 50,64,100 160 250 .03 6.06 .8 154 .03 6.25 .8 159 .03 6.62 .8 168 .03 6.75 .8 171 .03 6.88 7.12 .8 175 181 .06 1.5 .03 7.62 .8 194 .03 7.62 .8 194 .03 8.25 8.5 .8 210 216 .06 1.5 .03 8.62 .8 219 .03 9 .8 229 .03 9.5 9.5 .8 241 241 .06 9.75 1.5 248 .06 1.5 .03 10.75 .8 273 .03 11.88 12.12 .8 302 308 .06 12.5 1.5 318 .06 1.5 .03 13 .8 330 .03 14 14.25 .8 356 362 .06 14.62 1.5 371 .09 2.4

2500 400

8 203

9.5 241

11 279

13.38 340

16.75 425

continued on page 32

inches millimetres

diameter of raised face k

• 31 •


ring joint dimensions

enlarged section of groove

continued

nominal pipe size

groove dimensions

ring class 150 300 400 600 900 1500 2500 pn 20 50 64 100 160 250 400 number nps 12 r56 dn 300 r56 nps 12 12 12 12 r57 dn 300 300 300 300 r57 nps 12 r58 dn 300 r58 nps 14 r59 dn 350 r59 nps 12 r60 dn 300 r60 nps 14 14 14 r61 dn 350 350 350 r61 nps 14 r62 dn 350 r62 nps 14 r63 dn 350 r63 nps 16 r64 dn 400 r64 nps 16 16 16 r65 dn 400 400 400 r65 nps 16 r66 dn 400 r66 nps 16 R67 dn 400 r67 nps 18 r68 dn 450 r68 nps 18 18 18 r69 dn 450 450 450 r69 nps 18 r70 dn 450 r70 nps 18 r71 dn 450 r71 nps 20 r72 dn 500 r72 nps 20 20 20 R73 dn 500 500 500 R73 nps 20 R74 dn 500 R74 nps 20 R75 dn 500 R75 nps 24 R76 dn 600 R76 nps 24 24 24 r77 dn 600 600 600 R77 nps 24 r78 dn 600 r78 nps 24 r79 dn 600 r79 2

3

diameter of raised face k

pitch bott. dia. depth width radius p 15.000 381.00 15.000 381.00 15.000 381.00 15.625 396.88 16.000 406.40 16.500 419.10 16.500 419.10 16.500 419.10 17.875 454.02 18.500 469.90 18.500 469.90 18.500 469.90 20.375 517.52 21.000 533.40 21.000 533.40 21.000 533.40 22.000 558.80 23.000 584.20 23.000 584.20 23.000 584.20 26.500 673.10 27.250 692.15 27.250 692.15 27.250 692.15

e 0.250 6.35 0.312 7.92 0.562 14.27 0.250 6.35 0.688 17.48 0.312 7.92 0.438 11.13 0.625 15.88 0.250 6.35 0.312 7.92 0.438 11.13 0.688 17.48 0.250 6.35 0.312 7.92 0.500 12.70 0.688 17.48 0.250 6.35 0.375 9.52 0.500 12.70 0.688 17.48 0.250 6.35 0.438 11.13 0.625 15.88 0.812 20.62 4

f 0.344 8.74 0.469 11.91 0.906 23.01 0.344 8.74 1.312 33.32 0.469 11.91 0.656 16.66 1.062 26.97 0.344 8.74 0.469 11.91 0.656 16.66 1.188 30.18 0.344 8.74 0.469 11.91 0.781 19.84 1.188 30.18 0.344 8.74 0.531 13.49 0.781 19.84 1.312 33.32 0.344 8.74 0.656 16.66 1.062 26.97 1.438 36.53

300, 150 400,600 900 1500 r 20 50,64,100 160 250 .03 16 .8 406 .03 16.25 16.5 .8 413 419 .06 17.25 1.5 438 .03 16.75 .8 425 .09 2.4 .03 18 .8 457 .06 18.38 1.5 467 .09 19.25 2.4 489 .03 19 .8 483 .03 20 .8 508 .06 20.62 1.5 524 .09 21.5 2.4 546 .03 21.5 8 546 .03 22.62 8 575 .06 23.38 1.5 594 .09 24.12 2.4 613 .03 23.5 .8 597 .06 25 1.5 635 .06 25.5 1.5 648 .09 26.5 2.4 673 .03 28 .8 711 .06 29.5 1.5 749 .09 30.38 2.4 772 .09 31.25 2.4 794

2500 400

19.5 495

for footnotes, refer to page 30

inches

• 32 •

millimetres


long welding necks

weights

length thru hub

nominal size and bore b 1.00 25.4 1.25 31.8 1.50 38.1 2.00 50.8 2.50 63.5 3.00 76.2 3.50 88.9 4.00 101.6 5.00 127.0 6.00 152.4 8.00 203.2 10.00 254.0 12.00 304.8 14.00 355.6 16.00 406.4 18.00 457.2 20.00 508.0 24.00 609.6

class 150 thru 600 pn 20 thru 100 f 9 229 9 229 9 229 9 229 9 229 9 229 9 229 12 305 12 305 12 305 12 305 12 305 12 305 12 305 12 305 12 305 12 305 12 305

class 900 thru 2500 pn 160 thru 400 f 9 229 9 229 9 229 9 229 12 305 12 305 - - 12 305 12 305 12 305 12 305 12 305 12 305 12 305 12 305 12 305 12 305 12 305

hub diameter class 150 pn 20 *m 2.00 50.8 2.38 60.3 2.62 66.7 3.25 82.6 3.75 95.3 4.25 108.0 4.88 123.8 5.50 139.7 6.50 165.1 7.75 196.9 9.75 247.7 12.00 304.8 14.38 365.1 16.00 406.4 18.00 457.2 20.00 508.0 22.00 558.8 26.25 666.8

class 150 pn 20

class 300 pn 50

class 400 pn 64

class 600 pn 100

class 900 pn 160

class 1500 pn 250

class 2500 pn 400

8 3.6 10 4.5 12 5.5 17 7.7 22 10 26 12 32 14.5 47 21.5 58 26.5 77 35 103 47 144 66 207 94 212 96 250 114 274 125 314 143 426 194

10 4.5 14 6.5 17 7.7 19 9 28 13 36 16.5 45 20.5 54 24.5 86 39 108 49 150 68 218 99 289 131 342 155 426 193 493 224 575 261 823 374

11 5 14 6.5 17 7.7 21 9.5 29 13 38 17.5 48 21.5 67 30 90 41 115 52 160 72 230 104 301 136 357 161 443 199 513 231 602 271 856 385

11 5 14 6.5 17 7.7 21 9.5 29 13 38 17.5 48 22 80 36.5 128 58 158 72 215 98 343 156 409 186 432 196 564 256 654 297 840 381 1100 499

15 7 18 8 23 10.5 44 20 72 32.5 65 29.5 - - 98 44 143 65 199 90 310 140 356 161 541 244 568 256 670 302 949 427 1040 468 1775 799

15 7 18 8 23 10.5 44 20 72 32.5 84 38 - - 118 53 195 88 235 106 366 165 594 268 872 393 1030 464 1335 601 1750 788 2130 959 3180 1431

20 9 30 13.5 38 17 55 25 85 38.5 125 57 185 84 300 135 450 203 600 270 1045 471 1420 639 -

specifications: Long Welding Necks conform to ASTM specification A-105. Except as shown above, Long Welding Necks conform dimensionally to ASME/ANSI Standard B16.5.

inches

pounds

millimetres

kilograms

*Dimension “M” is given here for Class 150 (PN 20) Long Welding Necks only. For Class 300 (PN 50) and higher pressure ratings, outside diameter of the neck is the same as dimension “M” of ANSI flanges of comparable pressure rating (see pages 8 to 18). Facing and Finish: see page 4. Gasket dimensions: see page 20. Bolting dimensions: see page 22.

• 33 •


large diameter forged steel flanges

class 125 Lw slip-on flanges 1

2

astm a181 class 60

3

drilling

nps

DN 26 650 28 700 30 750 32 800 34 36 900 38 40 1000 42 1100 44 46 48 1200 50 52 1300 54 1400 60 1500 66 72 1800 84 96 2400 1

flange outside diameter O 34.25 870 36.5 927 38.75 985 41.75 1061 43.75 1111 46 1169 48.75 1238 50.75 1289 53 1346 55.25 1404 57.25 1454 59.5 1511 61.75 1569 64 1626 66.25 1683 73 1854 80 2032 86.5 2197 99.75 2534 113.25 2877

flange bore thickness diameter T C 1.00 25.4 1.00 25.4 1.00 25.4 1.12 28.6 1.12 28.6 1.12 28.6 1.12 28.6 1.12 28.6 1.25 As 31.8 1.25 specified 31.8 1.25 by 3.8 1.38 purchaser 34.9 1.38 34.9 1.38 34.9 1.38 34.9 1.50 38.1 1.50 38.1 1.50 38.1 1.75 44.5 2.00 50.8 4

length thru hub G 1.75 44.5 1.75 44.5 1.75 44.5 1.75 44.5 1.75 44.5 1.75 44.5 1.75 44.5 1.75 44.5 1.75 44.5 2.25 57.2 2.25 57.2 2.50 63.5 2.50 63.5 2.50 63.5 2.50 63.5 2.75 69.9 2.75 69.9 2.75 69.9 3.00 76.2 3.25 82.6

diameter of hub at base M 28.50 723.9 30.50 774.7 32.50 825.5 34.75 882.7 36.75 933.5 38.75 984.3 40.75 1035.1 43.00 1092 45.00 1143 47.00 1194 49.00 1245 51.00 1295 53.00 1346 55.00 1397 57.00 1448 63.00 1600 69.00 1753 75.00 1905 87.50 2223 100.00 2540

Class 125LW Slip-on Flanges in pipe sizes NPS 6 to 96 (DN 150 to 2400) are identical with AWWA Class D Flanges, as shown on page 40, and have the same diameter and drilling as Class 125 Cast Iron Flanges, ANSI B16.1 These flanges are designed for use with full face gaskets, but ring gaskets extending to the inside edge of the bolt holes may also be used. 2 Blind Flanges are available on request. 3 Can also be furnished in A181 Class 70 and A105 or any other material that can be forged or rolled. 4 When specifying bore it is recommended that this dimension be .19" (4.88 mm) • 34 • larger than the nominal O.D. of the pipe.

no. of holes 24 24 28 28 28 28 28 28 32 32 32 32 32 32 36 36 36 36 40 40 40 40 44 44 44 44 44 44 44 44 52 52 52 52 60 60 64 64 68 68

diameter of holes j 1.38 35 1.38 35 1.38 35 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.88 48 1.88 48 1.88 48 1.88 48 1.88 48 1.88 48 2.12 54 2.38 61

bolt diameter 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 3/4 1 3/4 1 3/4 1 3/4 1 3/4 1 3/4 1 3/4 1 3/4 1 3/4 1 3/4 1 3/4 1 3/4 2 2 2 1/4 2 1/4

dia. of bolt circle K 31.75 806.5 34.00 863.6 36.00 914.4 38.50 977.9 40.50 1028.7 42.75 1085.9 45.25 1149.4 47.25 1200.2 49.50 1257.3 51.75 1314.5 53.75 1365.3 56.00 1422.4 58.25 1479.6 60.50 1536.7 62.75 1593.9 69.25 1759.0 76.00 1930.4 82.50 2095.5 95.50 2425.7 108.50 2755.9

approx. weight 123 56 141 64 151 68.5 207 94 218 99 233 106 261 118 283 128 332 151 353 160 364 165 425 193 455 206 470 213 510 231 645 293 760 345 845 383 1015 460 1660 753

NOTE: At the time of printing this catalogue the metric Pressure Number (PN) equivalent of the Class 125 pressure rating of these LW flanges had not been established, neither had the metric Nominal Diameter (DN) conversions for various NPS sizes.

inches

pounds

millimetres

kilograms


large diameter forged steel flanges

class 125 american standard welding neck & slip-on flanges 1

2

astm a181 class 60

3

bore dia. of flange raised welding outside flange dia. thickness face neck o b r t 34.25 2.00 29.25 870 50.8 743 36.5 2.06 31.25 927 52.4 794 38.75 2.12 33.75 985 54.0 857 41.75 2.25 35.75 1061 57.2 908 43.75 2.31 37.75 1111 58.7 959 46 2.38 40.25 1169 60.3 1022 48.75 2.38 42.25 1238 60.3 1073 50.75 2.50 44.25 1289 63.5 1124 53 2.62 47 As 1346 66.7 1194 55.25 2.62 49 specified 1404 66.7 1245 57.25 2.69 51 by 1454 68.3 1295 59.5 2.75 53.5 purchaser 1511 69.9 1359 61.75 2.75 55.5 1569 69.9 1410 64.0 2.88 57.5 1626 73.0 1461 66.25 3.00 59.75 1683 76.2 1518 73.0 3.12 66 1854 79.4 1676 80.0 3.38 73 2032 85.7 1855 86.5 3.50 79.5 2197 88.9 2019 99.75 3.88 92.5 2534 98.4 2350 113.25 4.25 105.5 2877 108.0 2680 5

nps

DN 26 650 28 700 30 750 32 800 34 - 36 900 38 - 40 1000 42 1100 44 - 46 - 48 1200 50 - 52 1300 54 1400 60 1500 66 - 72 1800 84 - 96 2400

4

slip-on c 26.25 666.8 28.25 717.6 30.25 768.4 32.25 819.2 34.25 870.0 36.25 920.8 38.25 971.6 40.25 1022.4 42.25 1073.2 44.25 1124.0 46.25 1174.8 48.25 1225.6 50.25 1276.4 52.25 1327.2 54.25 1378.0 60.25 1530.4 66.25 1682.8 72.25 1835.2 84.25 2140.0 96.25 2444.8

length thru hub welding neck slip-on f g 5.00 3.38 127.0 85.7 5.06 3.44 128.6 87.3 5.12 3.5 130.2 88.9 5.25 3.62 133.4 92.1 5.31 3.69 134.9 93.7 5.38 3.75 136.5 95.3 5.38 3.75 136.5 95.3 5.50 3.88 139.7 98.4 5.62 4.00 142.9 101.6 5.62 4.00 142.9 101.6 5.69 4.06 144.5 103.2 5.75 4.12 146.1 104.8 5.75 4.12 146.1 104.8 5.88 4.25 149.2 108.0 6.00 4.38 152.4 111.1 6.12 4.50 155.6 114.3 6.38 4.88 161.9 123.8 6.50 5.00 165.1 127.0 6.88 5.38 174.6 136.5 7.25 5.75 184.2 146.1

1

4

diameter of hub no. at point at of of base welding holes m n 28.50 26 24 723.9 660 24 30.75 28 28 781.1 711 28 32.75 30 28 831.9 762 28 35.00 32 28 889.0 813 28 37 34 32 939.8 864 32 39.25 36 32 997.0 914 32 41.75 38 32 1060.5 965 32 43.75 40 36 1111.3 1016 36 46.00 42 36 1168.4 1067 36 48.00 44 40 1219.2 1118 40 50.00 46 40 1270.0 1168 40 52.25 48 44 1327.2 1219 44 54.25 50 44 1378.0 1270 44 56.50 52 44 1435.1 1321 44 58.75 54 44 1492.3 1372 44 65.25 60 52 1657.4 1524 52 71.50 66 52 1816.1 1676 52 78.50 72 60 1993.9 1829 60 90.50 84 64 2298.7 2134 64 102.75 96 68 2609.9 2438 68

drilling dia. of holes j 1.38 35 1.38 35 1.38 35 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.88 48 1.88 48 1.88 48 1.88 48 1.88 48 1.88 48 2.12 54 2.38 61

approximate weight dia. of bolt welding circle neck slip-on k 31.75 262 233 806.5 118 105 34.00 291 275 863.6 131 124 36.00 341 300 914.4 154 135 38.50 412 370 977.9 186 167 40.50 439 410 1028.7 198 185 42.75 495 460 1085.9 223 207 45.25 573 525 1149.4 258 236 47.25 619 575 1200.2 279 259 49.50 715 660 1257.3 322 297 51.75 755 695 1314.5 340 313 53.75 805 730 1365.3 362 329 56.00 880 810 1422.4 396 365 58.25 915 840 1479.6 412 378 60.50 1020 925 1536.7 459 416 62.75 1110 1040 1593.9 500 468 69.25 1360 1275 1759.0 612 574 76.00 1770 1625 1930.4 797 731 82.50 2125 1950 2095.5 956 878 95.50 2825 2620 2425.7 1271 1179 108.50 3830 3295 2755.9 1724 1483

These flanges have the same pressure ratings, dimensions and drillings as Class 125 Cast When ordering Welding Necks, specify thickness and O.D. of pipe or vessel Iron Flanges, ASME/ANSI B16.1. Class 125 American Standard slip-on flanges are also the to which the flange is to be welded. 5 All sizes are regularly furnished with flat face. A .06" (1.6 mm) raised face same as AWWA Class E flanges. 2 Blind Flanges are available on request. can be furnished on request. 3 Can also be furnished in A181 Class 70 and A105 or any other material that can be forged or rolled. NOTE: At the time of printing this catalogue the metric Pressure Number (PN) equivalent of the Class 125 pressure rating of these flanges had not inches pounds been established, neither had the metric Nominal Diameter (DN) conversions for various NPS sizes.

millimetres

kilograms

• 35 •


large diameter forged steel flanges

class 250 american standard welding neck & slip-on flanges

1

2

astm a181-class 60

3

nps

flange outside flange diameter thickness DN O T

26 650 28 700 30 750 32 800 34 36 900 38 40 1000 42 1100 44 46 48 1200

38.25 972 40.75 10.35 43.0 1092 45.25 1150 47.5 1207 50 1270 52.25 1327 54.5 1384 57 1448 59.25 1505 61.5 1562 65 1651

bore B

2.81 71.4 2.94 74.6 3.00 76.2 3.12 79.4 3.25 As 82.6 3.38 specified 85.7 3.44 by 87.3 3.56 purchaser 90.5 3.69 93.7 3.75 95.3 3.88 98.4 4.00 101.6

length thru hub G 5.81 147.6 5.94 150.9 6.00 152.4 6.12 155.6 6.25 158.8 6.38 161.9 6.44 163.5 6.56 166.7 6.94 176.2 7.00 177.8 7.12 181.0 7.25 184.2

dia. of hub at dia. of point of raised welding face N A welding neck 30.50 26 32.44 774.7 660 823.9 33.00 28 34.94 838.2 711 887.5 35.25 30 37.19 895.4 762 944.6 37.50 32 39.44 952.5 813 1001.8 39.50 34 41.44 1003.3 864 1052.5 41.50 36 43.69 1054.1 914 1109.7 43.50 38 45.69 1104.9 965 1160.5 45.75 40 47.94 1162.1 1016 1217.6 47.75 42 50.44 1212.9 1067 1281.1 49.75 44 52.69 1263.7 1118 1338.3 51.75 46 54.94 1314.5 1169 1395.4 54.00 48 58.44 1371.6 1219 1484.3

dia. of hub at base M

no. of holes

drilling diameter dia. of of bolts holes j

dia. of bolt circle K

approx. weight

28 28 28 28 28 28 28 28 28 28 32 32 32 32 36 36 36 36 36 36 40 40 40 40

1.88 48 1.88 48 1.88 48 1.88 48 1.88 48 2.12 54 2.12 54 2.12 54 2.12 54 2.12 54 2.12 54 2.12 54

1 1 1 1 1 1 1 1 1 1

3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 2 2 2 2 2 2 2 2 2 2 2 2 2 2

34.50 876.3 37.00 939.8 39.25 997.0 41.50 1054.1 43.50 1104.9 46.00 1168.4 48.00 1219.2 50.25 1276.4 52.75 1339.9 55.00 1397.0 57.25 1545.2 60.75 1543.1

535 241 640 289 695 313 780 351 885 398 965 434 1040 468 1150 518 1340 603 1420 639 1525 686 1850 833

28 28 28 28 28 28 28 28 28 28 32 32 32 32 36 36 36 36 36 36 40 40 40 40

1.88 48 1.88 48 1.88 48 1.88 48 1.88 48 2.12 54 2.12 54 2.12 54 2.12 54 2.12 54 2.12 54 2.12 54

1 1 1 1 1 1 1 1 1 1

3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 2 2 2 2 2 2 3 2 2 2 2 2 2 2

34.50 876.3 37.00 939.8 39.25 997.0 41.50 1054.1 43.50 1104.9 46.00 1168.4 48.00 1219.2 50.25 1276.4 52.75 1339.9 55.00 1397.0 57.25 1454.2 60.75 1543.1

530 239 630 284 700 315 800 360 895 403 975 439 1070 482 1180 531 1310 590 1420 639 1510 680 1825 821

slip-on 26 650 28 700 30 750 32 800 34 36 900 38 40 1000 42 1100 44 46 48 1200 1

38.25 972 40.75 1035 43 1093 45.25 1150 47.5 1207 50 1270 52.25 1328 54.5 1385 57 1448 59.25 1505 61.5 1562 65 1651

2.81 71.4 2.94 74.6 3.00 76.2 3.12 79.4 3.25 82.6 3.38 85.7 3.44 87.3 3.56 90.5 3.69 93.7 3.75 95.3 3.88 98.4 4.00 101.6

26.25 666.8 28.25 717.6 30.25 768.4 32.25 819.2 34.25 870.0 36.25 920.8 38.25 971.6 40.25 1022.4 42.25 1073.2 44.25 1124.0 46.25 1174.8 48.25 1225.6

4.75 120.7 5.00 127.0 5.00 127.0 5.12 130.2 5.25 133.4 5.38 136.5 5.50 139.7 5.50 139.7 5.62 142.9 5.75 146.1 5.88 149.2 6.00 152.4

These flanges have the same pressure ratings, dimensions and drillings as Class 250 Cast Iron Flanges ASME/ANSI B16.1. 2 Blind Flanges are available upon application. 3 Can also be furnished in A181 Class 70, and A-105 or any other material that can be forged or rolled.

30.50 774.7 33.00 838.2 35.25 895.4 37.50 952.5 39.50 1003.3 41.50 1054.1 43.50 1104.9 45.75 1162.1 47.75 1212.9 49.75 1263.7 51.75 1314.5 54.00 1371.6

- - - - - - - - - - - - - - - - - - - - - - - -

32.44 823.9 34.94 887.5 37.19 944.6 39.44 1001.8 41.44 1052.5 43.69 1109.7 45.69 1160.5 47.94 1217.6 50.44 1281.1 52.69 1338.3 54.94 1395.4 58.44 1484.3

NOTE: At the time of printing this catalogue the metric Pressure Number (PN) equivalent of the Class 125 pressure rating of these LW flanges had not been established, neither had the metric Nominal Diameter (DN) conversions for inches pounds various NPS sizes.

• 36 •

millimetres

kilograms


large diameter forged steel flanges

class 75

1

pressure vessel flanges

welding neck & slip-on

2

For Nominal I.D. Vessels ASTM A181 - Class 60

4

nominal size (inside diameter)

flange outside flange diameter thickness O C

bore B 3

length thru hub Y

26 660 28 711 30 762 32 813 34 864 36 914 42 1067 48 1219 54 1372 60 1524 66 1676 72 1829

31.5 800 33.5 85 35.5 902 38.25 972 40.25 1023 42.25 1073 49 1245 55 1397 61.25 1556 67.25 1708 74 1880 80 2032

1.25 31.8 1.25 31.8 1.25 31.8 1.25 31.8 1.25 As 31.8 1.25 specified 31.8 1.25 by 31.8 1.25 purchaser 31.8 1.38 35.1 1.62 41.3 1.88 47.6 2.25 57.2

3.00 76.2 3.00 76.2 3.00 76.2 3.25 82.6 3.25 82.6 3.25 82.6 3.50 88.9 3.75 95.3 4.00 101.6 4.38 111.1 4.88 123.8 5.25 133.4

26 660 28 711 30 762 32 813 34 864 36 914 42 1067 48 1219 54 1372 60 1524 66 1676 72 1829

33 838 35 889 37 940 39.5 1004 41.5 1054 43.5 1105 50 1270 56 1423 62.5 1588 68.5 1740 75.5 1918 81.5 2070

1.25 31.8 1.25 31.8 1.25 31.8 1.25 31.8 1.25 As 31.8 1.25 specified 31.8 1.25 by 31.8 1.25 purchaser 31.8 1.38 34.9 1.62 41.3 1.75 44.5 2 50.8

2.25 57.2 2.25 57.2 2.25 57.2 2.50 63.5 2.50 63.5 2.50 63.5 2.75 69.9 2.88 73.0 3.12 79.4 3.62 92.1 4.00 101.6 4.50 114.3

dia. of hub at point of welding A welding neck 27.12 688.8 29.12 739.8 31.12 790.6 33.38 847.7 35.38 As 898.5 37.38 specified 949.3 43.75 by 1111.3 49.75 purchaser 1263.7 56.00 1422.4 62.00 1574.8 68.0 1727.2 74.00 1879.6 slip-0n 28.50 - 723.9 - 30.50 - 774.7 - 32.50 - 825.5 - 34.62 - 879.5 - 36.62 - 930.3 - 38.62 - 981.1 - 44.75 - 1136.6 - 50.75 - 1289.1 - 57.25 - 1454.2 - 63.25 - 1606.6 - 69.50 - 1765.3 - 75.50 - 1917.7 -

dia. of hub at base X

3

no. of holes

diameter of holes

dia. of bolts

dia. of bolt circle K

approx. weight

28.62 727.1 30.62 777.9 32.62 828.7 35.00 889.0 37.00 939.8 39.00 990.6 45.50 1155.7 51.50 1308.1 57.75 1466.9 63.75 1619.3 70.12 1781.2 76.12 1933.6

32 32 36 36 36 36 36 36 40 40 40 40 48 48 52 52 64 64 72 72 72 72 80 80

1 26 1 26 1 26 1.12 29 1.12 29 1.12 29 1.25 32 1.25 32 1.25 32 1.25 32 1.38 35 1.38 35

7/8 7/8 7/8 7/8 7/8 7/8 1 1 1 1 1 1 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/4 1 1/4 1 1/4 1 1/4

29.62 752.5 31.62 803.3 33.62 854.1 36.12 917.6 38.12 968.4 40.12 1019.2 46.75 1187.5 52.75 1339.9 59.00 1498.6 65.00 1651.0 71.50 1816.1 77.50 1968.5

95 43 105 47 112 51 141 64 153 69 165 74 205 92 245 110 305 137 410 185 575 259 720 324

30.00 762.0 32.00 812.8 34.00 863.6 36.25 920.8 38.25 971.6 40.25 1022.4 46.50 1181.1 52.50 1333.5 59.00 1498.6 65.00 1651.0 71.62 1819.2 77.62 1971.7

32 32 36 36 36 36 40 40 40 40 44 44 48 48 56 56 68 68 72 72 72 72 80 80

1 26 1 26 1 26 1.12 29 1.12 29 1.12 29 1.25 32 1.25 32 1.25 32 1.25 32 1.38 35 1.38 35

7/8 7/8 7/8 7/8 7/8 7/8 1 1 1 1 1 1 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/4 1 1/4 1 1/4 1 1/4

31.00 787.4 33.00 838.2 35.00 889.0 37.38 949.3 39.38 1000.1 41.38 1050.9 47.75 1212.9 53.75 1365.3 60.25 1530.4 66.25 1682.8 73.00 1854.2 79.00 2006.6

115 52 140 63 155 70 165 74 175 79 190 86 225 101 260 117 325 146 440 198 575 259 725 326

“Nominal Size” column, with pipe or vessel thickness in the 0.25" (6.4 mm) to 0.5" (12.7 mm) range.

1

Alternate designation: 50 lb PRESSURE AT 100˚F (38˚C).

2

Blind Flanges available upon application.

4

3

When ordering these flanges specify thickness and O.D. of the pipe or component with which they will be used. Pressure ratings are based on I.D. of pipe or vessel as listed in

drilling dia. of raised face R

• 37 •

These flanges can also be supplied in any other material that can be forged or rolled.


large diameter forged steel flanges

class 175 welding neck & slip-on flanges 5

1

astm A-105 & a181-class 60

4

nominal size 26 660 28 711 30 762 32 813 34 864 36 914 38 965 40 1016 42 1067 44 1118 46 1168 48 1219 50 1270 52 1321 54 1372 60 1524 66 1676 72 1829 84 2134 96 2438 3

length thru flange dia. of hub thickness dia. of hub at flange hub at point of outside welding welding dia. neck slip-on bore neck slip-on base welding X O C C B Y Y A 31.5 1.38 1.38 3.38 2.75 27.62 800 34.9 34.9 85.7 69.9 701.7 33.5 1.38 1.38 3.38 2.75 29.62 851 34.9 34.9 85.7 69.9 752.5 35.75 1.38 1.38 3.62 2.75 31.88 908 34.9 34.9 92.1 69.9 809.6 37.75 1.38 1.38 3.62 2.75 33.88 959 34.9 34.9 92.1 69.9 860.4 40.25 1.50 1.75 3.75 3.38 35.88 1023 38.1 44.5 95.3 85.7 911.2 42.25 1.50 1.75 3.75 3.38 37.88 1074 38.1 44.5 95.3 85.7 962.2 44.25 1.75 2.00 4.12 3.75 39.88 1124 44.5 50.8 104.8 95.3 1012.8 46.25 1.75 2.00 4.12 4.00 41.88 1175 44.5 50.8 104.8 101.6 1063.6 49 2.00 2.38 4.50 4.38 44.12 As As 1245 50.8 60.3 114.3 111.1 1120.8 51 2.00 2.38 4.50 4.38 46.12 specified specified 1296 50.8 60.3 114.3 111.1 1171.6 53 2.00 2.38 4.50 4.62 48.12 by by 1347 50.8 60.3 114.3 117.5 1222.4 55 2.25 2.62 4.88 4.88 50.12 purchaser purchaser 1397 57.2 66.7 123.8 123.8 1273.2 57 2.25 2.62 4.88 4.88 52.12 1448 57.2 66.7 123.8 123.8 1324.0 59.5 2.62 3.00 5.38 5.38 54.25 1512 66.7 76.2 136.5 136.5 1378.0 61.5 2.62 3.00 5.38 5.38 56.25 1562 66.7 76.2 136.5 136.5 1428.8 67.5 2.75 3.12 5.75 5.88 62.25 1715 69.9 79.4 146.1 149.2 1581.2 73.5 3.12 4.00 6.12 .688 68.50 1867 79.4 101.6 155.6 174.6 1739.9 80 3.62 5.00 6.62 8.00 74.50 2032 92.1 127.0 168.3 203.2 1892.3 94 3.00 5.00 7.00 8.50 88.00 2388 76.2 127.0 177.8 215.9 2235.2 106 3.5 5.00 7.50 9.00 100.0 2693 88.9 127.0 190.5 288.6 2540.0 2

2

drilling dia. of raised no. of holes face R 29.00 28 736.6 28 31.00 28 787.4 28 33.25 36 844.6 36 32.25 36 895.4 36 37.38 36 949.3 36 39.38 36 1000.1 36 41.38 36 1050.9 36 43.38 40 1101.7 40 45.75 40 1162.1 40 47.75 40 1212.9 40 49.75 40 1263.7 40 51.75 44 1314.5 44 53.75 44 1365.3 44 56.00 44 1422.4 44 58.00 44 1473.2 44 64.00 48 1625.6 48 70.00 56 1778.0 56 76.50 64 1943.1 64 90.12 72 2289.2 72 102.12 88 2594.0 88

dia. of holes

bolt dia.

.88 23 .88 23 .88 23 .88 23 1 26 1 26 1 26 1 26 1.12 29 1.12 29 1.12 29 1.12 29 1.12 29 1.25 32 1.25 32 1.25 32 1.25 32 1.25 32 1.38 35 1.38 35

3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 1 1 1 1 1 1 1 1 1 1 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/4 1 1/4 1 1/4 1 1/4

approx. weight dia. of bolt welding neck slip-on circle K 29.88 125 110 758.8 56 50 31.88 130 120 809.6 59 54 34.12 145 135 866.8 65 61 36.12 165 145 917.6 74 65 38.38 190 205 974.7 86 92 40.38 210 215 1025.5 95 97 42.38 235 255 1076.3 106 115 44.38 250 275 1127.1 113 124 46.88 345 370 1190.6 155 167 48.88 365 385 1241.4 164 173 50.88 380 410 1292.2 71 185 52.88 425 455 1343.0 191 205 54.88 455 475 1393.8 205 214 57.25 550 605 1454.2 248 272 59.25 590 625 1505.0 266 281 65.25 675 725 1657.4 304 326 71.25 825 1020 1809.8 371 459 77.75 1060 1400 1974.9 477 630 91.50 1550 2225 2324.1 698 1001 103.50 1975 2575 2628.9 889 1159

1

Blind Flanges are available upon application.

4

These flanges can also be furnished in any other material that can be forged or rolled.

5

Alternate designation, 150 lb. WSP. at 750˚F (399˚C).

2

When ordering, specify thickness and O.D. of pipe vessel to which flange is to be welded.

3

Sizes are INSIDE diameters of pipe or shell used with Welding Neck Flanges, and NOMINAL outside diameters of pipe or shell used with Slip-on Flanges.

• 38 •

inches

pounds

millimetres

kilograms


large diameter forged steel flanges

class 300 welding neck & slip-on flanges 5

1

4

nominal size 26 660 28 711 30 762 32 813 34 864 36 914 38 965 40 1016 42 1067 44 1118 46 1168 48 1219 52 1321 54 1372 60 1524 66 1676 72 1829 84 2134 96 2438 3

astm a-105 & A181- class 60

length thru flange dia. of hub thickness dia. of hub at flange hub at point of outside welding welding dia. neck slip-on bore neck slip-on base welding X O C C B Y Y A 32.75 2.50 2.50 5.00 4.50 27.88 832 63.5 63.5 127.0 114.3 708.0 34.75 2.50 2.50 5.00 4.50 29.88 883 63.5 63.5 127.0 114.3 758.8 37 2.62 2.62 5.25 4.75 32.12 940 66.7 66.7 133.4 120.7 816.0 39 2.75 2.75 5.50 5.00 34.12 991 69.9 69.9 139.7 127.0 866.8 41 2.88 2.88 5.75 5.12 36.12 1042 73.0 73.0 146.1 130.2 917.6 43.75 3.12 3.12 6.13 5.62 38.5 1112 79.4 79.4 155.6 142.9 977.9 45.75 3.12 3.12 6.13 5.62 40.5 1162 79.4 79.4 155.6 142.9 1028.7 47.75 3.25 3.25 6.25 5.88 42.5 1213 82.6 82.6 158.8 149.2 1079.5 As As 50 3.50 3.50 6.50 6.12 44.75 1270 88.9 88.9 165.1 155.6 1136.7 specified specified 52.75 3.75 3.75 6.75 6.75 46.75 1340 95.3 95.3 171.5 171.5 1187.5 by by 54.75 4.25 4.25 7.25 7.25 48.75 1391 108.0 108.0 184.2 184.2 1238.3 purchaser purchaser 56.75 4.25 4.25 7.25 7.25 50.75 1442 108.0 108.0 184.2 184.2 1289.1 61.5 4.25 - 7.50 - 55 1562 108.0 - 190.5 - 1397.0 63.5 4.50 4.75 7.75 8.25 57 1613 114.3 120.7 196.9 209.6 1447.8 69.5 4.50 5.00 8.00 8.50 63 1766 114.3 127.0 203.2 215.9 1600.2 77 4.00 - .50 - 70 1956 101.6 - 215.9 - 1778.0 83 4.00 - 9.00 - 76 2109 101.6 - 228.6 - 1930.4 96.5 5.00 - 10.00 - 89 2451 127.0 - 254.0 - 2260.6 109.25 6.25 - 11.25 - 101.25 2775 158.85 - 285.8 - 2571.8 2

2

drilling dia. of raised no. of holes face R 29.50 28 749.3 28 31.50 28 800.1 28 33.75 32 857.3 32 35.75 36 908.1 36 37.75 40 958.9 40 40.25 40 1022.4 40 42.25 40 1073.2 40 44.25 44 1224.0 44 46.50 48 1181.1 48 48.88 44 1241.4 44 50.88 48 1292.2 48 52.88 48 1343.0 48 57.25 52 1454.2 52 59.25 52 1505.0 52 65.25 60 1657.4 60 72.38 60 1838.3 60 78.38 72 1990.7 72 91.50 80 2324.1 80 103.88 84 2638.4 84

dia. of holes

bolt dia.

1.12 29 1.12 29 1.12 29 1.12 29 1.12 29 1.25 32 1.25 32 1.25 32 1.25 32 1.38 35 1.38 35 1.38 35 1.5 35 1.5 35 1.5 35 1.62 42 1.62 42 1.75 45 1.88 48

1 1 1 1 1 1 1 1 1 1 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 1/2 1 1/2 1 1/2 1 1/2 1 5/8 1 5/8 1 3/4 1 3/4

approx. weight dia. of bolt welding neck slip-on circle K 30.62 250 230 777.9 113 104 32.62 265 255 828.7 119 115 34.88 310 290 885.8 140 131 36.88 340 325 936.6 153 146 38.88 385 350 987.4 173 158 41.50 475 460 1054.1 214 207 43.50 520 485 1104.9 234 218 45.50 550 525 1155.7 248 236 47.75 650 625 1212.9 293 281 50.25 770 760 1276.4 347 342 52.25 895 880 1327.2 403 396 54.25 925 925 1378.0 416 416 58.75 1075 1492.3 484 60.75 1225 1160 1543.1 551 522 66.75 1325 1470 1695.5 596 662 74.00 1680 1879.6 756 80.00 1875 2032.0 844 93.25 2950 2368.6 1328 105.75 4300 2686.1 1935 -

1

Blind Flanges are available upon application.

4

These flanges can also be furnished in any other material that can be forged or rolled.

2

When ordering, specify thickness and O.D. of pipe vessel to which flange is to be welded.

5

Alternate designation, 300 lb. WSP. at 750˚F (399˚C).

3

Sizes are INSIDE diameters of pipe or shell used with Welding Neck Flanges, and nominal outside diameters of pipe or shell used with Slip-on Flanges.

inches

pounds

millimetres

kilograms

• 39 •


large diameter forged steel flanges

awwa c207-55 hub flanges

2

astm a181-class 60 flange thickness C

dn 6 150 8 200 10 250 12 300 14 350 16 400 18 450 20

flange outside dia. O 11 280 13.5 343 16 407 19 483 21 534 23.5 597 25 635 27.5

class b&d .56 14.3 .56 14.3 .69 17.5 .69 17.5 .75 19.1 .75 19.1 .75 19.1 .75

bore dia. class E P 1.00 25.4 1.25 31.8 1.19 30.2 1.25 31.8 1.38 34.9 1.44 36.5 1.56 39.7 1.69

500 22 550 24 600 26 650 28 700 30 750 32 800 36 900 40 1000 42 1100 48 1200 60 1500 72 1800 96 2400

699 29.5 750 32 813 34.25 870 36.5 927 38.75 985 41.75 1061 46 1169 50.75 1289 53 1347 59.5 1512 73 1855 86.5 2197 113.25 2877

19.1 1 25.4 1 25.4 1 25.4 1 25.4 1 25.4 1.12 28.6 1.12 28.6 1.12 28.6 1.25 31.8 1.38 34.9 1.5 38.1 1.5 38.1 2.0 50.8

42.9 1.81 As 46.0 1.88 specified 47.6 2.00 by 50.8 2.06 purchaser 52.4 2.12 54.0 2.25 57.2 2.38 60.3 2.50 63.5 2.62 66.7 2.75 69.9 3.12 79.4 3.50 88.9 4.25 108.0

nps

3

length thru hub Y

dia. of hub at base x

class b&d 1.25 31.8 1.25 31.8 1.25 31.8 1.25 31.8 1.25 31.8 1.25 31.8 1.25 31.8 1.25

class E 1.56 39.7 1.75 44.5 1.94 49.2 2.19 55.6 2.25 57.2 2.50 63.5 2.69 68.3 2.88

class b&d 7.56 192.1 9.69 246.1 12.00 304.8 14.38 365.1 15.75 400.1 18.00 457.2 19.88 504.8 22.00

class E 7.56 192.0 9.69 246.0 12.00 304.8 14.38 365.1 15.75 400.0 18.00 457.2 19.88 504.8 22.00

31.8 1.75 44.5 1.75 44.5 1.75 44.5 1.75 44.5 1.75 44.5 1.75 44.5 1.75 44.5 1.75 44.5 1.75 44.5 2.50 63.5 2.75 69.9 2.75 69.9 3.25 82.6

73.0 3.12 79.4 3.25 82.6 3.38 85.7 3.44 87.3 3.50 88.9 3.62 92.1 3.75 95.3 3.88 98.4 4.00 101.6 4.12 104.8 4.50 114.3 5.00 127.0 5.75 146.1

558.8 24.25 616.0 26.12 663.6 28.50 723.9 30.50 774.7 32.50 825.5 34.75 882.7 38.75 984.3 43.00 1092.2 45.00 1143.0 51.00 1295.4 63.00 1600.2 75.00 1905.0 100.0 2540.0

558.8 24.25 616.0 26.12 663.6 28.50 723.9 30.75 781.1 32.75 831.9 35.00 889.0 39.25 997.0 43.75 1111.3 46.00 1168.4 52.25 1327.3 65.25 1657.4 78.50 1993.9 102.75 2609.9

CLASS B FLANGES have a water service rating at atmospheric temperature of 86 psi. These flanges have the same outside diameter, bolt circle and number of bolts as ASME/ANSI B16.1 (25 psi cast-iron pipe flanges and flanged fittings). In sizes NPS 48 (DN 1200) and under they have the same bolts, and in sizes over NPS 48 (DN 1200) they use larger bolts than specified by this 25 psi standard. They also have the same outside diameter, bolt circle, and number of bolts as ASME/ANSI B16.1 (125 psi cast-iron pipe flanges and flanged fittings), but use smaller bolts. CLASS D FLANGES have a water service rating at atmospheric temperature;

dia. of holes

approx. weight

8 8 8 8 12 12 12 12 12 12 16 16 16 16 20

dia. of bolt circle k 9.50 241.3 11.75 298.5 14.25 362.0 17.00 431.8 18.75 476.3 21.25 559.8 22.75 577.9 25.00

class b .75 20 .75 20 .75 20 .75 20 .88 23 .88 23 .88 23 .88

class D&E .88 23 .88 23 1 26 1 26 1.12 29 1.12 29 1.25 32 1.25

class b&d 14 6.3 18 8 27 12 41 18.5 45 20 57 25.5 59 26.5 68

class E 19 9 32 14.5 42 19 65 29 86 39 92 42 118 53 153

20 20 20 20 20 24 24 28 28 28 28 28 28 32 32 36 36 36 36 44 44 52 52 60 60 68 68

635.0 27.25 692.2 29.50 749.3 31.75 806.5 34.00 863.6 36.00 914.4 38.50 977.9 42.75 1085.9 47.25 1200.2 49.50 1257.3 56.00 1422.4 69.25 1759.0 82.50 2095.5 108.5 2755.9

23 .88 23 .88 23 .88 23 .88 23 1 26 1 26 1 26 1 26 1.12 29 1.12 29 1.38 35 1.38 35 1.88 48

32 1.38 35 1.38 35 1.38 35 1.38 35 1.62 42 1.62 42 1.62 42 1.62 42 1.62 42 1.62 42 1.88 48 1.88 48 2.38 61

31 75 34 117 53 126 57 139 63 152 68 208 94 235 106 281 127 327 147 420 189 645 291 855 385 1730 779

69 177 80 212 96 235 106 273 123 310 140 370 167 460 207 527 259 660 297 800 360 1275 574 1950 878 3250 1463

no. of holes

sizes NPS 6 to NPS 12 (DN 150 to DN 300) inclusive, 175 psi; sizes larger than NPS 12 (DN 300) 150 psi. These flanges have the same diameter and drilling as Class 125 cast-iron flanges. (ASME/ANSI B16.1). CLASS E FLANGES have a water service rating at atmospheric temperature of 275 psi. These flanges have the same diameter and drilling as Class 125 cast-iron flanges (ASME/ANSI B16.1). In sizes NPS 24 (DN 600) and smaller they also match ASME/ANSI B16.5 150 psi standard for steel flanges. All Flanges: Carbon steel bolts should be used. Cloth-inserted rubber gaskets .06" (1.6 mm) thick should be used and should extend from the I.D. of flange to at least the inside edge of the bolt holes.

1

Can also be furnished in A181 CLASS 70 and A-105, or any other material that can be forged or rolled.

3

2

Ring and Blind flanges to match AWWA Hub flanges are available upon application.

• 40 •

For sizes other than those shown full information is available upon request.


large diameter forged steel flanges

pipe line flanges class 150 (PN 20) welding neck & blind astm a-105

2

nps

flange flange outside thickness dia. (min.) C O 34.25 2.69 870 68.5 36.50 2.81 925 71.5 38.75 2.94 985 74.5 41.75 3.18 1060 81.0 43.75 3.25 1110 82.5 46.00 3.56 1170 90.5 48.75 3.44 1240 87.4 50.75 3.56 1290 90.5 53.00 3.81 1345 97.0 55.25 4.00 1405 102.0 57.25 4.06 1455 103.0 59.50 4.25 1510 108.0 61.75 4.38 1570 111.0 64.00 4.56 1625 116.0 66.25 4.75 1685 121.0 68.75 4.88 1745 124.0 71.00 5.06 1805 129.0 73.00 5.19 1855 132.0 2

dn 26 650 28 700 30 750 32 800 34 36 900 38 40 1000 42 1100 44 46 48 1200 50 52 1300 54 1400 56 58 60 1500

length thru hub Y 4.75 121 4.94 125 5.38 137 5.69 144 5.88 149 6.18 157 6.19 157 6.44 164 6.75 171 7.00 178 7.31 186 7.56 192 8.00 203 8.25 210 8.50 216 9.00 229 9.25 235 9.44 240 1

hub dia. at base X 26.62 675 28.62 725 30.75 780 32.75 830 34.75 380 36.75 935 39.00 990 41.00 1040 43.00 1090 45.00 1145 47.12 1195 49.12 1250 51.25 1300 53.25 1355 55.25 1405 57.38 1455 59.38 1510 61.38 1560

hub dia. at point of welding A 26.00 660 28.00 711 30.00 762 32.00 813 34.00 863 36.00 914 38.00 965 40.00 1016 42.00 1067 44.00 1118 46.00 1168 48.00 1219 50.00 1270 52.00 1321 54.00 1372 56.00 1422 58.00 1473 60.00 1524

drilling raised face dia. R 29.50 749 31.50 800 33.75 857 36.00 914 38.00 965 40.25 1022 42.25 1073 44.25 1124 47.00 1194 49.00 1245 51.00 1295 53.50 1359 55.50 1410 57.50 1460 59.50 1511 62.00 1575 64.00 1626 66.00 1676

1

Includes .06" (1.5mm) raised face.

2

Materials covered in this Standard are as in ASME/ANSI B16.5 except nickel based alloys are excluded.

3

Bore diameter as specified by Purchaser.

inches

pounds

millimetres

kilograms

• 41 •

no. of bolt holes

dia. of bolt holes

dia. of bolt circle

24 24 28 28 28 28 28 28 32 32 32 32 32 32 36 36 36 36 40 40 40 40 44 44 44 44 44 44 44 44 48 48 48 48 52 52

1.38 35 1.38 35 1.38 35 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.62 41 1.88 48 1.88 48 1.88 48 1.88 48 1.88 48 1.88 48

31.75 806 34.00 863 36.00 914 38.50 978 40.50 1029 42.75 1086 45.25 1150 47.25 1200 49.50 1257 51.75 1314 53.75 1365 56.00 1422 58.25 1480 60.50 1537 62.75 1594 65.00 1651 67.25 1708 69.25 1759

fillet radius (min.) r .38 10 .44 11 .44 11 .44 11 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13

approx. weight welding blind neck 300 136 315 143 360 163 435 197 465 211 520 236 778 353 831 377 966 438 1058 480 1131 513 1248 566 1351 613 1508 684 1667 756 1817 824 2006 910 2108 956

677 307 833 378 963 437 1200 544 1342 609 1540 698 1780 807 1992 903 2332 1058 2656 1205 2903 1317 3276 1486 3605 1635 4043 1834 4521 2051 4981 2259 5540 2513 6000 2722


large diameter forged steel flanges

welding neck & blind class 300 (pn 50)

3

asme b16.47 series a astm a-105 2

flange thickness

3

nps

dn 26 650 28 700 30 750 32 800 34 36 900 38 40 1000 42 1100 44 46 48 1200 50 52 1300 54 1400 56 58 60 1500

flange outside welding dia. neck O C 38.25 3.12 970 79.5 40.75 3.38 1035 85.5 43.00 3.62 1090 92.0 45.25 3.88 1150 98.5 47.50 4.00 1205 102 50.00 4.12 1270 105 46.00 4.25 1170 108 48.75 4.50 1240 114 50.75 4.69 1290 119 53.25 4.88 1355 124 55.75 5.06 1415 129 57.75 5.25 1465 133 60.25 5.50 1530 140 62.25 5.69 1580 144 65.25 6.00 1660 152 67.25 6.06 1710 154 69.25 6.25 1760 159 71.25 6.44 1810 164

blind E 3.31 84.0 3.56 90.5 3.75 95.0 3.94 100 4.12 105 4.38 111 4.25 108 4.50 114 4.69 119 4.88 124 5.06 129 5.25 133 5.50 140 5.69 144 6.00 152 6.06 154 6.25 159 6.44 164

length thru hub Y 7.25 184 7.75 197 8.25 210 8.75 222 9.12 232 9.50 241 7.12 181 7.62 194 7.88 200 8.12 206 8.50 216 8.81 224 9.12 232 9.38 238 9.94 252 10.25 260 10.50 267 10.75 273 1

hub dia. at base X 28.38 720 30.50 775 32.56 825 34.69 880 36.88 935 39.00 990 39.12 995 41.25 1050 43.25 1100 45.25 1150 47.38 1205 49.38 1255 51.38 1305 53.38 1355 55.50 1410 57.62 1465 59.62 1515 61.62 1565

hub dia. at point of welding A 26.00 660 28.00 711 30.00 762 32.00 813 34.00 863 36.00 914 38.00 965 40.00 1016 42.00 1067 44.00 1118 46.00 1168 48.00 1219 50.00 1270 52.00 1321 54.00 1372 56.00 1422 58.00 1473 60.00 1524

drilling raised face dia. R 29.50 749 31.50 800 33.75 857 36.00 914 38.00 965 40.25 1022 40.50 1029 42.75 1086 44.75 1137 47.00 1194 49.00 1245 51.25 1314 53.50 1359 55.50 1410 57.75 1467 59.75 118 62.00 1575 64.00 1626

no. of bolt holes

dia. of bolt holes

dia. of bolt circle

28 28 28 28 28 28 28 28 28 28 32 32 32 32 32 32 32 32 32 32 28 28 32 32 32 32 32 32 28 28 28 28 32 32 32 32

1.75 44 1.75 44 1.88 48 2.00 51 2.00 51 2.12 54 1.62 41 1.75 44 1.75 44 1.88 48 2.00 51 2.00 51 2.12 54 2.12 54 2.38 60 2.38 60 2.38 60 2.38 60

34.50 876 37.00 940 39.25 997 41.50 1054 43.50 1105 46.00 1168 43.00 1092 45.50 1156 47.50 1206 49.75 1264 52.00 1321 54.00 1372 56.25 1429 58.25 1480 61.00 1549 63.00 1600 65.00 1651 67.00 1702

fillet radius (min.) r .38 10 .44 11 .44 11 .44 11 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13 .50 13

approx. weight welding blind neck 615 279 750 340 858 390 960 435 1110 504 1223 560

1116 506 1362 618 1590 721 1862 845 2134 968 2586 1173

1

Includes .06" (1.5 mm) raised face.

2

Materials covered in this Standard are as in ASME/ANSI B16.47 except nickel based alloys are excluded.

3

Bore diameter as specified by Purchaser.

• 42 •

inches

pounds

millimetres

kilograms


large diameter forged steel flanges

pipe line flanges class 400 (pn 68) welding neck & blind

3

asme b16.47 series a astm a-105 2

flange thickness

1

nps

dn 26 650 28 700 30 750 32 800 34 36 900 38 40 1000 42 1100 44 46 48 1200 50 52 1300 54 1400 56 58 60 1500

flange outside welding dia. neck O C 38.25 3.50 970 89.0 40.75 3.75 1035 95.0 43.00 4.00 1090 102 45.25 4.25 1150 108 47.50 4.38 1205 111 50.00 4.50 1270 114 47.50 4.88 1205 124 50.00 5.12 1270 130 52.00 5.25 1320 133 54.50 5.50 1385 140 56.75 5.75 1440 146 59.50 6.00 1510 152 61.75 6.19 1570 157 63.75 6.38 1620 162 67.00 6.69 1700 170 69.00 6.88 1755 175 71.00 7.00 1805 178 74.25 7.31 1885 186

blind E 3.88 98.5 4.12 105 4.38 111 4.56 116 4.81 122 5.06 129 4.88 124 5.12 130 5.25 133 5.50 140 5.75 146 6.00 152 6.25 159 6.44 164 6.75 171 6.94 176 7.12 181 7.44 189

length thru hub Y 7.62 194 8.12 206 8.62 219 9.12 232 9.50 241 9.88 251 8.12 206 8.50 216 8.81 224 9.18 233 9.62 244 10.12 257 10.56 268 10.88 276 11.38 289 11.75 298 12.06 306 12.56 319 1

hub dia. at base X 28.62 725 30.81 785 32.94 835 35.00 890 37.19 945 39.38 1000 39.50 1005 41.50 1055 43.62 1110 45.62 1160 47.75 1215 49.88 1265 52.00 1320 54.00 1370 56.12 1425 58.25 1480 60.25 1530 62.38 1585

hub dia. at point of welding A 26.00 660 28.00 711 30.00 762 32.00 813 34.00 863 36.00 914 38.00 965 40.00 1016 42.00 1067 44.00 1118 46.00 1168 48.00 1219 50.00 1270 52.00 1321 54.00 1372 56.00 1422 58.00 1473 60.00 1524

drilling raised face dia. R 29.50 749 31.50 800 33.75 857 36.00 914 38.00 965 40.25 1022 40.5 1035 43.00 1092 45.00 1143 47.25 1200 49.50 1257 51.50 1308 53.62 1362 55.62 1413 57.88 1470 60.12 1527 62.12 1527 64.38 1527

no. of bolt holes

dia. of bolt holes

dia. of bolt circle

28 28 28 28 28 28 28 28 28 28 32 32 32 32 32 32 32 32 32 32 36 36 28 28 32 32 32 32 28 28 32 32 32 32 32 32

1.88 48 2.00 51 2.12 54 2.12 54 2.12 54 2.12 54 1.88 48 2.00 51 2.00 51 2.12 54 2.12 54 2.38 60 2.38 60 2.38 60 2.62 67 2.62 67 2.62 68 2.88 73

34.50 876 37.00 940 39.25 997 41.50 1054 43.50 1105 46.00 1168 44.00 1118 46.25 1175 48.25 1226 50.50 1283 52.75 1340 55.25 1403 57.50 1460 59.50 1511 62.25 1581 64.25 1632 66.25 1683 69.00 1753

1

Does not include .25" (6.5mm) raised face.

2

Material covered in this Standard are as in ASME/ANSI B16.5 except nickel based alloys are excluded.

3

Bore diameter as specified by Purchaser.

4

These flanges can also be supplied in any material that can be forged or rolled.

inches

pounds

millimetres

kilograms

• 43 •

fillet radius (min.) r .44 11 .50 13 .50 13 .50 13 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14

approx. weight welding blind neck 769 349 902 409 1025 465 1188 539 1340 608 1520 689

1226 556 1483 673 1760 798 2036 924 2374 1077 2756 1250


large diameter forged steel flanges

pipe line flanges class 600 (pn 100)

3

welding neck & blind ansi/asme b16.47 series a astm a-105 2

flange thickness

3

nps

dn 26 650 28 700 30 750 32 800 34 36 900 38 40 1000 42 1100 44 46 48 1200 50 52 1300 54 1400 56 58 60 1500

flange outside welding dia. neck O C 40.00 4.25 1015 108 42.25 4.38 1075 111 44.50 4.50 1130 114 47.00 4.62 1195 117 49.00 4.75 1245 121 51.75 4.88 1315 124 50.00 6.00 1270 152 52.00 6.25 1320 159 55.25 6.62 1405 168 57.25 6.81 1455 173 59.50 7.06 1510 179 62.75 7.44 1595 189 65.75 7.75 1670 198 67.75 8.00 1720 203 70.00 8.25 1780 210 73.00 8.56 1855 217 75.00 8.75 1905 222 78.50 9.19 1995 233

blind E 4.94 125 5.19 132 5.50 140 5.81 148 6.06 154 6.38 162 6.12 156 6.38 162 6.75 171 7.00 178 7.31 186 7.69 195 8.00 203 8.25 210 8.56 217 8.88 225 9.12 232 9.56 243

length thru hub Y 8.75 222 9.25 235 9.75 248 10.25 260 10.62 270 11.12 283 10.00 254 10.38 264 11.00 279 11.38 289 11.81 300 12.44 316 12.94 329 13.25 337 13.75 349 14.25 362 14.56 370 15.31 389 1

hub dia. at base X 29.44 748 31.62 803 33.94 862 36.12 917 38.31 973 40.62 1032 40.25 1022 42.25 1073 44.28 1125 46.50 1181 48.62 1235 50.75 1289 52.88 1343 54.88 1394 57.00 1448 59.12 1502 61.12 1552 63.38 1610

hub dia. at point of welding A 26.00 660 28.00 711 30.00 762 32.00 813 34.00 863 36.00 914 38.00 965 40.00 1016 42.00 1067 44.00 1118 46.00 1168 48.00 1219 50.00 1270 52.00 1321 54.00 1372 56.00 1422 58.00 1473 60.00 1524

drilling raised face dia. R 29.50 749 31.50 800 33.75 857 36.00 914 38.00 965 40.25 1022 41.50 1054 43.75 1111 46.00 1168 48.25 1226 50.25 1276 52.50 1283 54.50 1384 56.50 1435 58.75 1492 60.75 1543 63.00 1600 65.25 1657

no. of bolt holes

dia. of bolt holes

dia. of bolt circle

28 28 28 28 28 28 28 28 28 28 28 28 28 28 32 32 28 28 32 32 32 32 32 32 28 28 32 32 32 32 32 32 32 32 28 28

2.00 51 2.12 54 2.12 54 2.38 60 2.38 60 2.38 60 2.38 60 2.38 60 2.62 67 2.62 67 2.62 67 2.88 73 3.12 79 3.12 79 3.12 79 3.38 86 3.38 86 3.62 92

36.00 914 38.00 965 40.25 1022 42.50 1080 44.50 1130 47.00 1194 45.75 1162 47.75 1213 50.50 1283 52.50 1327 54.75 1391 57.50 1467 60.00 1524 62.00 1575 64.25 1632 66.75 1695 68.75 1746 71.75 1822

fillet radius (min.) r .50 13 .50 13 .50 13 .50 13 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .56 14 .62 16 .62 16 .69 17

approx. weight welding blind neck 963 437 1120 508 1232 559 1500 680 1580 717 1750 794

1734 786 1029 916 2398 1088 2815 1277 3206 1454 3744 1698

1

Includes .25" (6.5 mm) raised face.

2

Materials covered in this Standard are as in ASME/ANSI B16.5 except nickel based alloys are excluded.

3

Bore diameter as specified by Purchaser.

• 44 •

inches

pounds

millimetres

kilograms


large diameter forged steel flanges

pipe line flanges class 900 (pn 150)

2

3

welding neck & blind ansi/asme b16.47 series a astm a-105 4

flange thickness

3

nps

dn 26 650 28 700 30 750 32 800 34 36 900 38 40 1000 42 1100 44 46 48 1200

flange outside welding dia. neck O C 42.75 5.50 1085 140 46.00 5.62 1170 143 48.50 5.88 1230 149 51.75 6.25 1315 159 55.00 6.50 1395 165 57.50 6.75 1460 171 57.50 750 1460 190 59.50 7.75 1510 197 61.50 8.12 1560 206 64.88 8.44 1650 214 68.25 8.88 1735 225 70.25 9.19 1785 233

blind E 6.31 160 6.75 171 7.18 183 7.62 194 8.06 205 8.44 214 8.50 216 8.81 224 9.12 232 9.56 243 10.06 256 10.38 264

length thru hub Y 11.25 286 11.75 298 12.25 311 13.00 330 13.75 349 14.25 362 13.88 352 14.31 364 14.62 37 15.38 391 16.18 411 16.50 419 1

hub dia. at base X 30.50 775 32.75 832 35.00 889 37.25 946 39.62 1006 41.88 1064 42.75 1073 44.38 1127 46.31 1176 48.62 1235 50.88 1292 52.88 1343

hub dia. at point of welding A 26.00 660 28.00 711 30.00 762 32.00 813 34.00 864 36.00 914 38.00 965 40.00 1016 42.00 1067 44.00 1118 46.00 1168 48.00 1219

drilling raised face dia. R 29.50 749 31.50 800 33.75 857 36.00 914 38.00 965 40.25 1022 43.25 1099 45.75 1162 47.75 1213 50.00 1270 52.50 1334 54.50 1384

1

Does not include .25" (6.5 mm) raised face.

2

Materials covered in this Standard are as in ASME/ANSI B16.5, except nickel based alloys are excluded.

3

Bore diameter as specified by Purchaser.

inches

pounds

millimetres

kilograms

• 45 •

no. of bolt holes

dia. of bolt holes

dia. of bolt circle

20 20 20 20 20 20 20 20 20 20 20 20 20 20 24 24 24 24 24 24 24 24 24 24

2.88 73 3.12 79 3.12 79 3.38 86 3.62 92 3.62 92 3.62 92 3.62 92 3.62 92 3.88 98 4.12 105 4.12 105

37.50 952 40.25 1022 42.75 1086 45.50 1156 48.25 1226 50.75 1289 50.75 1289 52.75 1340 54.75 1391 57.62 1464 60.50 1537 62.50 1588

fillet radius (min.) r .44 11 .50 13 .50 13 .50 13 .56 14 .56 14 .75 19 .81 21 .81 21 .88 22 .88 22 .94 24

approx. weight welding blind neck 1614 732 1894 859 2196 996 2628 1192 3100 1407 3535 1603

2423 1099 3012 1366 3564 1617 4286 1944 5207 2362 6003 2723


large diameter steel flanges

class 150 (pn 20) and class 300 (pn 50) welding neck astm a-105

2

flange flange diameter thickness DN O C 3

nps

26 650 28 700 30 750 32 800 34 850 36 900 42 1100 48 1200 54 1400 60 1500 4

30.94 786 32.94 837 34.94 887 37.06 941 39.56 1005 41.62 1057 48.25 1226 54.81 1392 61.00 1549 67.94 1726

1.62 41.3 1.75 44.4 1.75 44.4 1.81 46.0 1.94 49.2 2.06 52.4 2.31 58.7 2.56 65.1 2.81 71.4 3.00 76.2

raised face dia. R

bore B

28.00 711.2 30.00 762.0 32.00 812.8 34.00 As 863.6 36.25 specified 920.8 38.25 by 971.6 44.50 Customer 1130.3 50.75 1289.0 56.75 1441.4 63.00 1600.2

hub dia. at point of welding A 26.06 662.0 28.06 712.8 30.06 763.6 32.06 814.4 34.06 865.2 36.06 916.0 42.12 1070.0 48.12 1222.4 54.12 1374.8 60.12 1527.2

drilling length thru hub Y

fillet radius r

no. of holes

dia. of holes

dia. of bolt circle K

approx. weight

3.50 88.9 3.75 95.2 3.94 100.0 4.25 108.0 4.34 110.3 4.62 117.5 5.25 133.4 5.88 149.2 6.38 161.9 7.06 179.4

.38 9.5 .38 9.5 .38 9.5 .38 9.5 .38 9.5 .38 9.5 .44 11.1 .44 11.1 .44 11.1 .56 14.3

36 36 40 40 44 44 48 48 40 40 44 44 48 48 44 44 56 56 52 52

.88 22.2 .88 22.2 .88 22.2 .88 22.2 1.00 25.4 1.00 25.4 1.12 28.6 1.25 31.8 1.25 31.8 1.38 34.9

29.31 744.5 31.31 795.3 33.31 846.1 35.44 900.1 37.69 957.3 39.75 1009.6 46.12 1171.6 52.56 1335.1 58.75 1492.2 65.44 1662.1

139 63 163 74 176 80 203 92 249 113 284 129 406 184 509 231 632 287 855 388

5.69 144.5 5.88 149.2 6.22 158.0 6.62 168.3 6.81 173.0 7.12 181.0 8.06 204.8 8.81 223.8 9.44 239.7 10.69 271.5

.56 14.3 .56 14.3 .56 14.3 .62 15.9 .62 15.9 .62 15.9 .62 15.9 .62 15.9 .62 15.9 .69 17.5

32 32 36 36 36 36 32 32 36 36 32 32 36 36 40 40 48 48 40 40

1.38 34.9 1.38 34.9 1.50 38.1 1.62 41.3 1.62 41.3 1.75 44.4 1.88 47.6 2.00 50.8 2.00 50.8 2.38 60.3

31.62 803.3 33.75 857.2 36.25 920.8 38.50 977.9 40.62 1031.9 42.88 1089.0 49.00 1244.6 55.75 1416.0 62.12 1578.0 69.44 1736.7

399 181 447 203 590 268 727 330 787 357 893 405 1252 568 1611 731 1979 898 2890 1311

3

hub dia. at base X class 150 26.94 684.2 28.94 735.0 31.00 787.4 33.06 839.8 35.12 892.2 37.19 944.6 43.38 1101.7 49.50 1257.3 55.62 1412.9 61.81 1570.0 class 300

26 650 28 700 30 750 32 800 34 850 36 900 42 1100 48 1200 54 1400 60 1500 4

34.12 867 36.25 921 39.00 991 41.50 1054 43.62 1108 46.12 1172 52.50 1334 59.50 1511 65.88 1673 73.94 1878

3.50 88.9 3.50 88.9 3.69 93.7 4.06 103.2 4.06 103.2 4.06 103.2 4.69 119.1 5.06 128.6 5.38 136.5 5.94 150.8

29.00 736.6 31.00 787.4 33.25 844.6 35.50 As 901.7 37.50 specified 952.5 39.75 by 1009.6 46.00 Customer 1168.4 52.25 1327.2 58.25 1479.6 65.00 1651.0

1

Also available in Class 75. Particulars upon request.

2

Materials covered in this Standard are the same as ASME/ANSI B16.5 except nickel base alloys are excluded.

26.19 665.2 28.19 716.0 30.25 768.4 32.25 819.2 34.25 870.0 36.25 920.8 42.31 1074.7 48.31 1227.1 54.31 1379.5 60.31 1531.9

27.62 701.7 29.75 755.6 32.00 812.8 34.00 863.6 36.12 917.6 38.00 965.2 44.00 1117.6 50.31 1277.9 56.50 1435.1 62.94 1598.6

Materials extracted from API STANDARD 605, Second Edition, October 1978, Large Diameter Carbon Steel Flanges (Nominal Pipe Size 26 to 60, inclusive; Classes 75, 150 and 300) Tables 3, B-2 and B-3, reprinted by courtesy of the American Petroleum Institute.

3

Flange Thickness C and Length through Hub Y includes .06" (1.6 mm) raised face.

for details of welding bevel, refer to page 48.

• 46 •

inches

pounds

millimetres

kilograms


identification

WESTLUND flanges, where the size and design permits, are marked with the following identification data in accordance with asme/ansi b16.5: Trade Mark or name Nominal size Primary service pressure B16 (ANSI designation) Material designation Heat code

forged flange tolerances Millimetres in brackets

welding neck & sock. weld

slip-on & sock. weld.

threaded

lap joint

blind

± .06 (1.6) ±.12 (3.2)

±.06 (1.6) ±.12 (3.2)

±.06 (1.6 ±.12 (3.2)

±.06 (1.6) —.12 (3.2)

±.06 (1.6) ±.12 (3.2)

Bore NPS 10 (DN 250) & less ±.03 (0.8) NPS 12 - 18 (DN 300 - 450) ±.06 (1.6) NPS 20 (DN 500) & over + .12 (3.2)2 —.06 (1.6)

+.03 (0.8) —0 +.06 (1.6) —0 +.06 (1.6)4 —0

+.03 (0.8) —0 +.06 (1.6) —0 +.06 (1.6) —0

+.03 (0.8) —0 +.06 (1.6) —0 +.06 (1.6) —0

— — — — — —

Flange Thickness NPS 18 (DN 450) & less)

+.12 (3.2) —0

+.12 (3.2) —0

+.12 (3.2) —0

+.12 (3.2) —0

+.12 (3.2) —0

NPS 20 (DN 500) & over

+.19 (4.8) —0

+19 (4.8) —0

+.19 (4.8) —0

+.19 (4.8) —0

+.19 (4.8) —0

Raised Face Diameter

±.03 (0.8) ±.02 (0.5)

±.03 (0.8) ±.02 (0.5)

±.03 (0.8) ±.02 (0.5)

— —

±.03 (0.8) ±.02 (0.5)

±.06 (1.6) ±.03 (0.8) .03 (0.8) max. .06 (1.6) max. — — — ±.09 (2.4) -.06 (1.6) ±.12 (3.2)

±.06 (1.6) ±.03 (.08) .03 (0.8) max. .06 (1.6) max. — — — ±.09 (2.4) -.06 (1.6) ±.12 (3.2)

±.06 (1.6) ±.03 (0.8) .03 (0.8) max. .06 (1.6) max. — — — ±.09 (2.4) -.06 (1.6) ±.12 (3.2)

±.06 (1.6) ±.03 (0.8) .03 (0.8) max. .06 (1.6) max. — — — ±.09 (2.4) -.06 (1.6) ±.12 (3.2)

±.06 (1.6) ±.03 (0.8) — — — — — — — —

Diameter of Hub at Bevel NPS 5 (DN 125) & less

+.09 (2.4) -.03 (0.8)

— —

— —

— —

— —

NPS 6 (DN 150) & over

+.16 (4.0) ±.03 (0.8)

— —

— —

— —

— —

dimension Outside Diameter 1

Flange O.D. 24 or less (609.6) Flange O.D. over 24 (609.6)

2

2

.06 (1.6) raised face .25 (6.4) raised face

Drilling Bolt circle Bolt hole spacing Eccentricity NPS 2 1/2 (DN 65) & less NPS 3 (DN 80) & larger Length Thru Hub NPS 4 & less ±.06 (Welding Neck Flanges) NPS 5 to 10 +.06 -.12 NPS 12 & larger +.12 -.18 Diameter of Hub at Base NPS 12 (DN 300) & less NPS 14 (DN 350) & over) 3

1

Thickness of Hub at Bevel

All sizes of welding neck

4

4

Minimum, —12 1/2& of matching nominal pipe wall thickness

1

These tolerances not covered by ASME/ANSI B16.5.

2

Welding Neck and Socket Welding small bore.

3

Between bolt circle diameter and machined facing diameter.

4

Socket Welding Socket.

• 47 •


welding bevels - (weld neck flanges no backing rings)

ASME/ANSI B16.5, ASME B16.47

ASME/ANSI B16.5, ASME B16.47

Nominal pipe wall thickness T = 0.88 (22.2 mm) max. For wall thickness less than 0.19 in. (4.8) mm) for carbon and ferritic alloy steel, and 0.125 in. (3.2 mm) austenitic alloy steel, ends may be cut square or slightly chamfered at manufacturer’s option.

T = more than 0.88" (22.4 mm)

Although great care has been taken in compiling the information contained in this catalogue, WESTLUND does not accept responsibility for the consequences of any errors, nor for the effects of any subsequent changes made by the various sources of data.

Catalogue Section 3

W-FSF

• 48 •

Forged Steel Flanges  

Forged steel flanges product catalog

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