What is a WPS and a PQR?
Welding Procedure Specification (WPS)
A Welding Procedure Specification (WPS) is the formal written document describing welding procedures, which provides direction to the welder or welding operators for making sound and quality production welds as per the code requirements . The purpose of the document is to guide welders to the accepted procedures so that repeatable and trusted welding techniques are used.
A WPS is developed for each material alloy and for each welding type used. Specific codes and/or engineering societies are often the driving force behind the development of a company's WPS.
A WPS is a legal copyrighted document which is supported by a Procedure Qualification Record (PQR).
Procedure Qualification Record (PQR)
A Procedure Qualification Record (PQR) is a record of a test weld performed and tested to ensure that the procedure will produce a good weld. Individual welders are certified with a test which records all the information that was used to weld the test piece it shows they have the understanding and demonstrated ability to work within the specified WPS.