Separate WPS for Weld Repair(Pwht weld)

By gpnaban2000 Date 01-04-2008 19:00

We are using grater than 19 mm thk material in piping fabrication.As per B31.3 we done PWHT on this weld joint.If repair on weld joint any separate WPS require to repair the weld as per sec IX and B31.3 or we can use same original WPS.Kindly explain.

By js55

Date 01-04-2008 19:39

You do not need a seperate WPS for repairs under ASME. However, if your doing ASME you are probably being audited by ASME and therefore I would be surprised if the auditors did not require you to address the weld repair process in some manner in either your manuals, or a General specification, of some other form of documentation as suits you. And this documentation would refer to the WPS you intend to use.
The language will pertain to excavation, inspection, PWHT, etc., or other details which may be alloy specific.

By js55

Date 01-04-2008 19:40

And uh, if not audited, I would highly recommend some form of documentation and/or instructions, as to the repair process.