Posted by: heatsschoolofweldingtechnology | December 3, 2008

Purpose of the Welding Procedure Specification (WPS)


The purpose of the WPS is clearly stated in ASME IX QW-100.1

QW-100.1

The purpose of the Welding Procedure Specification (WPS) and Procedure Qualification Record (PQR) is to determine that the weldment proposed for construction is capable of providing the required properties for its intended application. It is presupposed that the welder or welding operator performing the welding procedure qualification test is a skilled workman. That is, the welding procedure qualification test establishes the properties of the weldment, not the skill of the welder or the welding operator. In addition to this general requirement, special considerations for notch toughness are required by orher Section of the Code. Briefly, a WPS lists the variables, both essential and nonessential, and the acceptable ranges of these variables when using the WPS. The WPS is intended to provide direction for the welder/welding operator. The PQR lists what was used in qualifying the WPS and the test results.

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