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INTRODUCTION
Unions with seal at 37°
Table 12
Thread Wrench Torque Nm ±10%
7/16” - 20 14 13
1/2” - 20 16 19
9/16” - 18 17 28
3/4” - 16 22 47
7/8” - 14 27 76
1 1/16” - 12 32 110
36 110
1 3/16” - 12 36 138
1 5/16” - 12 38 155
1 5/8” - 12 50 215
1 7/8” - 12 60 290
2 1/2” - 12 75 345
Union for pipes with eye mounting
These torques refer to tightening of unions with new copper sealing washers.
Table 13
One-way pipe unions Three-way pipe unions Four-way pipe unions
Thread Wrench Torque Nm
±10%
Wrench Torque Nm
±10%
Wrench Torque Nm
±10%
M8x1 - 12 14 - -
M8x1.25 13 14
M10x1 - - 14 20 14 20
M10x1.25 13 20 - - - -
M12x1.25 17 30 - - - -
M12x1.5 - - 17 30 17 30
M14x1.5 19 40 19 40 19 40
M16x1.5 22 48 22 48 22 48
M18x1.5 22 58 24 58 24 58
M20x1.5 27 65 - - - -
M22x1.5 - - 27 73 27 73
M24x1.5 32 80 - - - -
M26x1.5 - - 32 95 32 95
M28x1.5 36 110 - - - -
M30x1.5 - - 36 130 36 130
M35x2 41 180 - - - -
M38x1.5 - - 46 200 46 200
M42x2 50 250 - - - -
M45x1.5 - - 55 280 55 280
M50x2 60 320 - - - -
M52x1.5 - - 60 320 60 320
M65x2 - - 75 450 75 450
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