Technical training
Basic Technical Training Standard / V9 2024-06-24
Figure 8.1 – Photograph of 1-stage marking
Description of 2-stage marking:
IMPORTANT!
Always tight and mark before going to next bolt/stud
Training provider: insert photo of 2-stage marking
Figure 8.2 – Photograph of 2-stage marking
9. Securing Bolts During Tensioning
In some instances, it may be necessary to secure bolts or studs during tightening activities to prevent unintended rotation of components. Only correct tools, such as a stud thread holder/bolt fixation tool should be used for this task. Never use a non-purpose tool as it may damage the bolts or studs, or even WTG.
Figure 9.1 – Photographic example of a correctly secured stud thread holder/bolt fixation tool
10. Tensioning Procedures
Two-stage tightening is used on some joints to reduce the need for re-tightening during service. Any bolts that need loosening or replacing must be re-tightened using two-stage tightening if they were originally two-stage tightened.
When tightening using two stages it is crucial to follow the specific values given in the work instruction.
Two-stage tensioning in this scenario must follow the below steps:
1) Loosely mount all nuts and bolts in the joint and using, for example with your hand.
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