Technical training
Basic Technical Training Standard / V9 2024-06-24
Figure 9.1 – Illustration of a typical counter support/ counter wrench/ backup wrench
10. Torquing Procedures
One and two-stage torquing in this scenario must follow the below steps:
1) Loosely mount all nuts and bolts in the joint and using, for example an electrical torque wrench or rattle gun. 2) 1-stage: using an electrical torque wrench with reaction arm, tighten the nut to the value specified in table 2.1, mark the nut and bolt according to the procedure described in section 8 of this manual. Always tighten and mark before going to next bolt/nut!
Bolt
1-stage tightening
1
Value 1 of the given torque setting set by the scenario
2
Value 2 of the given torque setting set by the scenario
3
Value 3 of the given torque setting set by the scenario
Table 2.1: 1-Stage tightening specifications
If you set the torque value at less than 70% of the 2-stage tightening process, then you will not have to loosen the bolts for the next step, saving time.
Note
3) 2-stage: using hydraulic torquing tools, tighten all of the nuts to the % of the final torque value specified in table 3.1. Mark the nut and bolt according to the procedure described in section 8 of this manual. Always tighten and mark before going to next bolt/nut!
2-stage tightening specifications
Bolt
Stage 1
Stage 2
70 % of the given torque setting set by the scenario 70 % of the given torque setting set by the scenario
100 % of the given torque setting set by the scenario 100 % of the given torque setting set by the scenario
1
2
Table 3.1: 2-stage tightening specifications
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