Close-up of a metallic surface with white, pink, and red paint or substance.

Weld Procedure Development (WPS/PQR)

Stack of six metal doughnut-shaped objects with a ruler measuring approximately 150 millimeters placed beside them.

Weld Procedure Development (WPS/PQR) establishes and documents the specific methods, materials, and parameters required to produce welds that meet quality and code requirements. The Welding Procedure Specification (WPS) provides welders with step-by-step instructions—such as joint design, base metals, filler metals, preheat, welding process, and parameters—while the Procedure Qualification Record (PQR) contains test results that verify the procedure produces acceptable mechanical and metallurgical properties. Together they ensure repeatable, certified weld quality and compliance with industry standards.

We develop qualifications and documented procedures for steel, aluminum, and stainless steel. We have experience working with a wide range of material thicknesses, from 1–50 mm (0.04–2.0 in).

How do we develop a welding procedure specification for thick steel structures?


We begin with a technical review of materials, joint design, anticipated service conditions, and any post-weld treatments. Great Lakes Welding Consultants selects appropriate base and filler metals, joint geometry, preheat/interpass/post-weld heat-treatment requirements, welding sequecnce and welding processes. We execute procedure qualification testing (PQR), produce a detailed WPS, and validate it with mechanical testing and production trials. Finally, we refine the WPS based on test results and shop feedback to ensure robust field performance.