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