Technical training
Basic Technical Training Standard / V9 2024-06-24
8. Marking for Bolts
Marking is a visual indication that a bolt has been tightened to specification. Therefore, bolts may NEVER be marked prior to tightening, marking must follow the below process:
IMPORTANT!
Always tight and mark before going to next bolt/stud
Description of 1-stage marking
Training provider: please fill in the marking procedure to be used in training.
Training provider: insert photo of 1-stage marking
Figure 8.1 – Photograph of 1-stage marking
Description of 2-stage marking:
IMPORTANT!
Training provider: please fill in the marking procedure to be used in training.
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 Torquing
In some instances, it may be necessary to secure bolts or nuts during tightening to prevent unintended rotation of components. Only correct tools, such as a counter support/counter wrench/backup wrench should be used for this task. Never use a spanner or other non-purpose tool as it may damage the nut, bolt, or even WTG.
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