Appendix A - Body/bonnet bolting torques

APPENDIX A

INDICATIVE BONNET BOLTING (BOLTED BONNET*) TORQUE NM

TABLE A

STUD SIZE inch-TPI

1/4-20 UNC 5/16-18 UNC

B7/B7M/B16/L7/L7M/ L43/660 Cl.A/UNS N07718/UNS 09925 B8 Cl.2/B8C Cl.2/B8M Cl.2/B8T Cl.2/XM-19 UNS N06625 Gr 1

Bolting Material

7 7 5 15 15 10

3/8-16 UNC 7/16-14 UNC 1/2-13 UNC 9/16-12 UNC 5/8-11 UNC 3/4-10 UNC 7/8-9 UNC 1-8 UNC 1.1/8-8 UN 1.1/4-8 UN 1.3/8-8 UN 1.1/2-8 UN 1.5/8-8 UN 25 25 15 40 40 25 60 60 40

90 90

60 120 120 80 215 215 145 345 315 230 520 475 345 725 625 510 1000 880 715 1460 975 975 1925 1285 1285 2480 1655 1655

1.3/4-8 UN

* Consult APV for pressure seal bonnet 3140 2090 2090

Note:

(1) Torque tolerance ±10%. (2) For temperatures above 750°F (400°C) use 75% of the torque values. In high temperature services, there is a possibility of creep in the bonnet studs. Regular checking of the bonnet - studs for tightness, would help prevent leakage through the bonnet gasket. (3) Above torque values are with the bolts lubricated. (4) Values above are based on 30,000 psi (206.85 Mpa) bolting stress and lubricated with heavy graphite and oil mixture or a copper based anti-seize grease. (5) Do not exceed by more than 25% of values stated when emergency torquing is required. (6) All bolts shall be torqued in the pattern as shown in Figure 2 on next page to ensure uniform gasket loading. (7) Optimum torque can vary depending on type of body gasket but do not increase torque more than 10% above those shown. (8) Consult us for other bolt material. (9) Most B8M and B8 bolts are class 1 so do not assume class 2 unless you are sure.

Note For ‘pressure seal’ bonnet consult APV for torques (where bolting is applicable). Bolt tensions shown must be decreased by 25% when other or no lubrication used. Non lubricated bolts can have an efficiency of less than 50% the torque of values stated. Indicative torques are shown only, different body gasket systems, different sizes & classes, etc., will have different torque requirements. Furthermore, other stud grades can have much lower torques depending if class 1 or class 2 and or above variables.

APPENDIX A - CONT.

BOLT TIGHTENING SEQUENCE EXAMPLE

FIGURE 2

TABLE B

When torque wrenches are not available or suitable, the use of standard wrenches and guidelines will apply to avoid over torque or damage to the valve. (Never use impact wrench)

UNC BOLT SIZE LENGTH OF WRENCH

3/8” 1/2” 9/16” 5/8” 3/4” 7/8” 1” 1 1/8” 1 1/4”

125mm (5”) 150mm (6”) 225mm (9”) 300mm (12”) 450mm (18”) 600mm (24”) 750mm (30”) 900mm (36”) 1050mm (42”)

APPENDIX A - CONT.

TABLE C

Size Cv Value for API 594/BS 1868 Swing Check Valve Units (gal/min)/(lbf/in2)0.5

mm inch 150LB 300LB 600LB 900LB 1500LB 2500LB

50 2 123.9 123.9 123.9 105.0 105.0 68.1 80 3 281.8 281.8 281.8 259.3 239.4 159.6 100 4 524.1 524.1 521.4 482.7 425.5 267.1 150 6 1234.6 1234.6 1234.6 1140.7 988.2 259.3 200 8 2281.5 2281.5 2213.5 2021.0 1751.1 1180.7 250 10 3573.7 3573.7 3404.3 3137.6 2729.9 300 12 5340.4 5340.4 5104.7 4569.4 3975.9 350 14 6511.0 6511.0 6142.9 5565.3 4794.4 400 16 8624.9 8624.9 8068.6 7268.9 6267.6 450 18 11472.8 11155.6 9575.4 500 20 14304.0 13964.2 12884.7 600 24 20866.1 20419.8 18682.8 750 30 33735.6

TABLE D

Size Cracking Pressure for API 594/BS 1868 Swing Check Valve Units kPa (Psi)

mm inch 150LB 300LB 600LB 900LB 1500LB 2500LB

50 2 1.93 (0.28) 2.00 (0.29) 2.20 (0.32) 4.75 (0.69) 5.10 (0.74) 7.10 (1.03) 80 3 2.27 (0.33) 2.48 (0.36) 2.82 (0.41) 3.17 (0.46) 4.34 (0.63) 8.54 (1.24) 100 4 1.79 (0.26) 1.93 (0.28) 1.72 (0.25) 2.76 (0.40) 4.48 (0.65) 7.10 (1.03) 150 6 1.24 (0.18) 1.17 (0.17) 2.07 (0.30) 3.58 (0.52) 3.72 (0.54) 8.54 (1.24) 200 8 1.52 (0.22) 1.52 (0.22) 2.27 (0.33) 3.93 (0.57) 4.82 (0.70) 10.54 (1.53) 250 10 1.31 (0.19) 1.31 (0.19) 2.14 (0.31) 4.13 (0.60) 5.79 (0.84) 300 12 1.45 (0.21) 1.45 (0.21) 2.82 (0.41) 4.00 (0.58) 6.13 (0.89) 350 14 2.07 (0.30) 2.14 (0.31) 3.31 (0.48) 3.86 (0.56) 9.78 (1.42) 400 16 1.72 (0.25) 1.72 (0.25) 3.24 (0.47) 4.96 (0.72) 9.65 (1.40) 450 18 1.65 (0.24) 2.14 (0.31) 3.58 (0.52) 5.51 (0.80) 500 20 1.86 (0.27) 2.27 (0.33) 600 24 1.79 (0.26) 2.89 (0.42)

APPENDIX A - CONT.

TABLE E

Size Cv Value for API 6D Swing Check Valve Units (gal/min)/(lbf/in2)0.5

mm inch 150LB 300LB 600LB 900LB 1500LB 2500LB

50 2 124 124 124 124 124 101 80 3 282 282 282 282 282 200 100 4 523 523 523 523 523 398 150 6 1236 1236 1236 1236 1141 947 200 8 2283 2283 2283 2283 2085 1815 250 10 3574 3574 3574 3574 3217 2804 300 12 5347 5347 5347 5347 4801 4098 350 14 6528 6528 6528 6034 5813 4969 400 16 8609 8609 8609 8084 7533 6451 450 18 11478 11478 11478 10807 9960 8459 500 20 14307 14307 14307 13386 12441 10605 600 24 20898 20898 20898 19576 17968

TABLE F

Size Cracking Pressure for API 6D Swing Check Valve Units kPa (Psi)

mm inch 150LB 300LB 600LB 900LB 1500LB 2500LB

50 2 2.55 (0.37) 2.55 (0.37) 2.55 (0.37) 2.27 (0.33) 3.79 (0.55) 4.82 (0.70) 80 3 1.72 (0.25) 1.72 (0.25) 2.69 (0.39) 2.00 (0.29) 2.82 (0.41) 5.37 (0.78) 100 4 1.72 (0.25) 1.72 (0.25) 1.45 (0.21) 2.55 (0.37) 2.82 (0.41) 3.58 (0.52) 150 6 0.96 (0.14) 0.96 (0.14) 1.58 (0.23) 2.89 (0.42) 2.82 (0.41) 4.82 (0.70) 200 8 1.31 (0.19) 1.31 (0.19) 1.86 (0.27) 3.24 (0.47) 3.86 (0.56) 250 10 1.10 (0.16) 1.10 (0.16) 1.65 0.24) 3.17 (0.46) 4.48 (0.65) 300 12 1.10 (0.16) 1.10 (0.16) 2.34 (0.34) 2.27 (0.33) 4.48 (0.65) 350 14 1.65 (0.24) 1.38 (0.20) 2.48 (0.36) 400 16 1.38 (0.20) 1.72 (0.25) 2.76 (0.40) 450 18 1.72 (0.25) 2.55 (0.37) 2.55 (0.37) 500 20 2.55 (0.37) 1.72 (0.25) 2.69 (0.39) 600 24 1.72 (0.25)