
Review of welding procedures (WPS) and welder qualifications, combined with non-destructive testing witnessing (RT, UT, PT, MT) to verify weld integrity without destructive intervention, protecting structural and pressure-boundary integrity before the joint is covered or put into service.
The inspector reviews the WPS, PQR and welder qualifications, then witnesses fit-up, visual inspection and the specified NDT (RT, UT, MT, PT) at the stages where a defect can still be seen and repaired. Because welds carry the structural and pressure-boundary load, verifying them before the joint is coated or put into service is central to the whole inspection.
Key Highlights
- Welding Procedure Specification (WPS) and welder qualification review
- NDT witnessing: RT, UT, PT and MT
- Visual weld inspection against approved acceptance criteria
- Weld traceability and documentation control