WPS, PQR and welder qualification explained
In welding work, the WPS describes how a weld is to be made under a qualified procedure, while the PQR records the parameters and test results used to qualify that procedure. Welder qualification demonstrates the person’s ability within a defined range.
Key takeaway
WPS, PQR and welder qualification are related but not interchangeable. Construction code, applicable edition, materials, processes, positions and variables determine qualification ranges.
Control points
Identify the contractually applicable code and edition.
Confirm the WPS is supported by the required procedure qualification.
Check process, materials, thickness, diameter and position ranges.
Verify preheat, consumables, gases and essential parameters.
Confirm the welder is qualified for the required range.
Maintain traceability between weld, welder, WPS and inspection records.
Common mistakes
Frequently asked questions
Does a WPS prove that a procedure is qualified?
A WPS provides welding instructions. Qualification must be demonstrated under the applicable code, commonly through a PQR or another mechanism allowed by that code.
Can a qualified welder weld any joint?
No. Qualification is limited by variables and ranges defined by the applicable code.
Does AXYALE issue welder qualifications?
No. AXYALE explains documentation and supervision principles; it does not replace code- or client-required tests and qualifications.