Insulation Kits Torque
Make sure that the insulation kit you received is undamaged and contains the materials and parts you requested;
Check that the flange faces and fully threaded bolts are clean and lubricated;
Use the torque wrench.PDF Download
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Please use calibrated torque wrench or other tool which have control functions.
Be installed in accordance with the recommended torque;
Tighten the nut always in accordance with the symmetrical cross drawing. (See table 1#)
The 5 steps should be followed:
a. Initial tighten all nuts by hand, the big nut can use small wrench;
b. Tighten each nuts by 30% of recommended torque;
c. Tighten each nuts by 60% of recommended torque;
d. Tighten each nuts by 100% of recommended torque;
e. Tighten all nuts in clockwise direction to make sure all the nuts reach required torque.
Recommended Bolt Torque Chart (Table 1#)
|Nominal Diameter of Bolt||Torque Value|
> Recommended bolt torque is based on deriving a minimum gasket seating stress of 7,500 psi;
> Bolt torque values listed assume a lubricated stud bolt resulting in a 0.16 friction factor;
> Recommended torque values are based on using weld-neck (integral) flanges;
> Different sealing loads. 30 psi bolt stress may exceed the design allowable stress levels for certain stud bolt materials.