Who should prepare and qualify a welding procedure?

Who should prepare and qualify a welding procedure?

• A. The engineer
• B. The owner
• C. The contractor or fabricator
• D. The AHJ

Answer: (C)

Welding procedures for standpipe and hose system joints are put in place by the party who will actually perform the welding and maintain control over the fabrication process. The contractor or fabricator develops the welding procedure specification (WPS) and then has it qualified through the required tests to prove that the welds will meet the specified performance on the materials and thickness involved. This includes choosing the welding process, filler material, joint design, preheat and interpass temperatures, and any post-weld treatments, and it requires documenting the procedure qualification record (PQR) to demonstrate capability. The engineer designs the system and may specify codes or acceptance criteria, but the on-site welding details and their qualification belong to the contractor or fabricator, since they own and perform the welding. The AHJ reviews and approves compliance with the codes, but does not typically prepare the WPS themselves, and the owner oversees the project rather than handling the welding procedure qualification.

Welding procedures for standpipe and hose system joints are put in place by the party who will actually perform the welding and maintain control over the fabrication process. The contractor or fabricator develops the welding procedure specification (WPS) and then has it qualified through the required tests to prove that the welds will meet the specified performance on the materials and thickness involved. This includes choosing the welding process, filler material, joint design, preheat and interpass temperatures, and any post-weld treatments, and it requires documenting the procedure qualification record (PQR) to demonstrate capability. The engineer designs the system and may specify codes or acceptance criteria, but the on-site welding details and their qualification belong to the contractor or fabricator, since they own and perform the welding. The AHJ reviews and approves compliance with the codes, but does not typically prepare the WPS themselves, and the owner oversees the project rather than handling the welding procedure qualification.