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Selection of the base material typically is the responsibility of the design engineer, but beyond that, the welding engineer, or other person in charge of writing the WPS, has a wide range of options when it comes to the many essential variables. Many welding processes may be used.

A SWPS is similar to a prequalified WPS in that a fabricator can obtain it and use it without having to qualify it by testing, unless otherwise stated in the contract documents. The main difference is that a fabricator can purchase a SWPS from the AWS and they are good to go.

A welding procedure specification (WPS) is a written document providing direction to the welder (or welding operator). It contains all the necessary parameters viz. joints, base metals, filler metals, positions, preheat, PWHT, gas etc. (including ranges, if any) under which the welding process must be performed.

With that said, who truly is the one to determine the range of approval of a WPS? Most, if not all, codes and specification require the approval by the responsible engineer, welding engineer, expert, supervisor, or welding coordinator (definition depending on the applicable code / specification).

A Welding Procedure Specification, or WPS, is a formal written document describing standard welding procedures. Like a recipe for welders, these procedures provide clear direction for your welders to make quality products that are up to code and industry standards.

A single PQR can cost anywhere between $1,000 and $3,000 depending on the level of testing required. Since prequalified WPS are exempt from testing the savings can be significant, especially when multiple welding procedures are required. Quality – the use of prequalified welding procedures can improve weld quality.

There are essentially four steps to writing a complete welding procedure specification WPS. What Do You Need to Complete Your Weld. ... Add essential information to the Preliminary Welding Procedure Specification pWPS. ... Welding Procedure Qualification Record PQR. ... Create one final Weld Procedure Specification.