Pipe Thread Installation Torque Table Chart

Fluids, Piping and Hydraulic Design Data

Brass and steel Pipe thread (NPT) installation procedure and torque specification table and chart.

T.F.F.T = Assembly turns from finger tight with pipe thread sealant or teflon tape applied.

Pipe Thread Size
NPTF
T.F.F.T.
1/8 - 27 2 - 3
1/4 - 18 2 - 3
3/8 - 18 2 - 3
1/2 -14 2 - 3
3/4 - 14 2 - 3
1 - 11 1/2  
1 - 11 1/4  1.5 - 2.5
1  - 11 1/2 1.5 - 2.5
2  - 11 1/2 1.5 - 2.5

Torque

Size In-lbs Newtons-m
1/16" 5.0 0.57
1/8" 7.0 0.79
1/4" 16 1.81
3/8" 23 2.60
1/2" 30 3.39
3/4" 54 6.10
1" 78 8.81

 

Pipe Thread Illustration

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