Assum, base metal is qualified by SMAW process, if detect of defect weld joint, i can use original WPS Smaw to repair or shall be run a new PQR to repair ?
No you can use the same WPS to repair the defects .
But one thing to remind is that whether the defects found is major or minor if they are major you have to wait for clients opinion.
There are two options that need to clarify with your Client and submit for approval before applying.
- Using an original WPS, as @Aravind_km advice.
- Using the repaired WPS for partical weld or full weld which depending on project requirement. Below photo for mock-up repair partial penetration weld.