The use of temporary attachments may be used for purpose of assembly, installation by tacking weld. Tacking weld may require a written procedure for application, tack welder may be required a qualified welder.
The method should be used in such a way that the can be easiest removed without any damage occurring to the members.
MATERIALS
All materials used for the temporary attachments should be compatible with parent material.
Stainless steel tools for stainless steel or non-ferrite material.
Carbon steel for carbon steel only.
REMOVE ATTACHMENT
All temporary attachment shall be carefully removed after used, where removal is carried out by
· Air-arc gouging,
· Arc gouging, or
· Flame cutting.
The cut shall be made clear of any parent material such as that 3.0 mm of the temporary attachment.
INSPECTION
100% inspection on the affected area of the parent material shall be carried out.
Visual inspection
Surface detection by MT or PT.
If any imperfections are found e.g. undercut or under flushing these areas shall be blended smooth or dressed by welding.
Base material thickness should be verified by the used of ultrasonic inspection or suitable depth gauge.
IMPOTANT: Removal of temporary attachments by hammering or bending is not permitted.
The method should be used in such a way that the can be easiest removed without any damage occurring to the members.
All materials used for the temporary attachments should be compatible with parent material.
Stainless steel tools for stainless steel or non-ferrite material.
Carbon steel for carbon steel only.
REMOVE ATTACHMENT
All temporary attachment shall be carefully removed after used, where removal is carried out by
· Air-arc gouging,
· Arc gouging, or
· Flame cutting.
The cut shall be made clear of any parent material such as that 3.0 mm of the temporary attachment.
100% inspection on the affected area of the parent material shall be carried out.
Visual inspection
Surface detection by MT or PT.
If any imperfections are found e.g. undercut or under flushing these areas shall be blended smooth or dressed by welding.
Base material thickness should be verified by the used of ultrasonic inspection or suitable depth gauge.
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