Appendix Operation and Maintenance Manual
Standard tightening torques
8.4.4 Standard torques for metric flange joints
Fig. 101: Flange joints overview
Information
u Tightening torques applied to mating material: steel.
u Tightening torques tolerances in the table: + 10 %.
u Before screwing, lubricate thread with engine oil.
8.4.5 Standard torques for metric thread unions L series (up to 500 bar/
7252 Psi)
Pipe
diam. X
Thread Y Form A with
sealing ring
Form B with
sealing edge
Form E with flat
sealing
Form F with O-
ring
Nm ft/lb Nm ft/lb Nm ft/lb Nm ft/lb
6 M 10 x 1,0 9 6.64 18 13.28 18 13.28 15 11.06
8 M 12 x 1,5 20 14.75 30 22.13 25 18.44 25 18.44
10 M 14 x 1,5 35 25.81 45 33.19 45 33.19 35 25.81
12 M 16 x 1,5 45 33.19 65 47.94 55 40.57 40 29.5
15 M 18 x 1,5 55 40.57 80 59 70 51.63 45 33.19
18 M 22 x 1,5 65 47.94 140 103.26 125 92.2 60 44.25
22 M 26 x 1,5 90 66.38 190 140.14 180 132.76 100 73.76
28 M 33 x 2,0 150 110.63 340 250.77 310 228.64 160 118.01
35 M 42 x 2,0 240 177.01 500 368.78 450 331.9 210 154.89
42 M 48 x 2,0 290 213.89 630 464.66 540 398.28 260 191.77
Tab. 46: Standard torques for metric thread unions L series, part 1 – see figure above
Pipe diam. X Thread Y WH TH SWVE
Nm ft/lb Nm ft/lb Nm ft/lb
6 M 10 x 1,0 18 13.28 18 13.28 18 13.28
164
© 2018 by Kohler Co. All rights reserved.
KD83V16 33521030601_0_1 EN_US
2018-07
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