When To Use Torque Limits
When a torque value is not specified in an individual Work Package (WP), use the procedures in this WP to
determine proper torque limits and use of adapters with torque wrenches.
How To Use Adapters With Torque Wrenches
When an adapter is necessary due to space or type of fitting being torqued, it must be determined how the
adapter changes the amount of force applied. If the adapter increases or decreases the distance from the drive of
the torque wrench to the fitting being torqued, an equation must be used to compensate for the difference.
The following abbreviations apply to the procedures below:
DT = Desired Torque
LT = Length of Torque Wrench
AL = Adapter Length
AT = Applied Torque
If the adapter used decreases the distance between the center of the torque wrench handle and the
center of the drive, first find the desired torque for the fitting, then calculate as follows:
Figure 1. Torque Wrench Drive Centerline.
Multiply DT by LT.
Subtract AL from LT.
Divide the first answer by the second answer to find AT.