The main differences between a PQR and a WPS

A WPS and PQR are mandatory documents when welds need to comply to a standard.

  • A WPS has the welding parameters explained in the context of instructions to allow for the welder to reproduce the product with a particular quality and standard.

  • A PQR uses these welding parameters as a checklist to see if the standard is met or not.

My understanding is correct or not?

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I have posted this article at The difference between PQR and WPS accordance with ASME IX?

Procedure specification record (PQR) true recorded during the welding of the test coupon.

Welding procedure specification (WPS) : is a written qualified welding procedure, development from PQR and applies all essential / supplementary / non-essential variables