Appendix Operation and Maintenance Manual
Standard tightening torques
Series Pipe diam. X Thread Z Nm ft/lb Nm ft/lb
mm inch UN/UNF Steel Stainless steel
4 6 1/4 7/17-20 15 11.06 30 22.13
5 8 5/16 1/2-20 20 14.75 40 29.5
6 10 3/8 9/16-18 30 22.13 60 44.25
8 12 1/2 3/4-16 60 44.25 115 84.82
10 14, 15,
16
5/8 7/8-14 75 55.32 145 106.95
12 18, 20 3/4 1 1/16-12 110 81.13 180 132.76
16 22 7/8 1 5/16-12 135 99.57 225 165.95
16 25 1 1 5/16-12 175 129.07 255 188.08
28 1 5/8-12 260 191.77 295 217.58
20 30, 32 1 1/4 1 5/8-12 260 191.77 295 217.58
35 1 7/8-12 340 250.77 345 254.46
24 38 1 1/2 1 7/8-12 340 250.77 345 254.46
28 42 2 1/4-12 380 280.27 400 295.02
32 2 2 1/2-12 450 331.9 470 346.65
Tab. 56: Standard torques for triple lock flange joints
Information
To tighten the screwed socket, proceed like following:
u Hold screwed socket instead.
u Unscrew union nut until noticeable resistance (without wrench extension).
u Tighten union nut according torque above.
8.4.12 Standard torques for VSTI screw plugs
Fig. 106: VSTI screw plugs
Thread Nm ft/lb Thread Nm ft/lb
M 10 x 1 10 7.38 M 26 x 1,5 100 73.76
M 12 x 1,5 20 14.75 M 27 x 2 120 88.51
M 14 x 1,5 30 22.13 R 3/4” 120 88.51
M 16 x 1,5 40 29.5 M 30 x 1,5 120 88.51
M 18 x 1,5 50 36.88 M 33 x 2 200 147.51
M 20 x 1,5 60 44.25 M 38 x 1,5 280 206.52
170
© 2018 by Kohler Co. All rights reserved.
KD83V16 33521030601_0_1 EN_US
2018-07
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