Appendix
Service and Repair Manual
Standard tightening torques
Serie
Pipe diam. X
Thread Z
Tightening torque
mm
inch
UN/UNF
Steel
Stainless
steel
10
14, 15, 16
5/8
7/8-14
75 Nm
55 ft-lb
145 Nm
107 ft-lb
12
18, 20
3/4
1 1/16-12
110 Nm
81 ft-lb
180 Nm
133 ft-lb
16
22
7/8
1 5/16-12
135 Nm
100 ft-lb
225 Nm
166 ft-lb
16
25
1
1 5/16-12
175 Nm
129 ft-lb
255 Nm
188 ft-lb
28
1 5/8-12
260 Nm
192 ft-lb
295 Nm
218 ft-lb
20
30, 32
1 1/4
1 5/8-12
260 Nm
192 ft-lb
295 Nm
218 ft-lb
35
1 7/8-12
340 Nm
251 ft-lb
345 Nm
254 ft-lb
24
38
1 1/2
1 7/8-12
340 Nm
251 ft-lb
345 Nm
254 ft-lb
28
42
2 1/4-12
380 Nm
280 ft-lb
400 Nm
295 ft-lb
32
2
2 1/2-12
450 Nm
332 ft-lb
470 Nm
347 ft-lb
Tab. 75: 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 to torque above.
5.3.9 Standard torques for VSTI screw plugs for steel
According to DIN EN ISO 6149-2 / ISO 11926-2, metric threading.
Information
Tolerances of the indicated tightening torques: 10 %.
Always lubricate the thread before tightening these parts (engine oil).
Fig. 350: VSTI screw plugs with ED seal (left), with o-ring (right)
288
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KD83V16 33525088901_2_1 EN_US
2021-07
