Welding
Welding procedure and welder qualification standards.
ASME Section IX
ASMEWelding, Brazing, and Fusing Qualifications
ASME BPVC Section IX establishes the rules for qualifying welding, brazing, and fusing procedures (WPS/PQR) and the performance of welders and operators. It is referenced by the construction codes (B31.3, B31.1, Section VIII) as the common qualification framework, so that a joint welded to a qualified procedure by a qualified welder has known, defensible integrity.
AWS D1.1
AWSStructural Welding Code — Steel
Welding requirements for statically and cyclically loaded structural steel — pipe supports, structures, and pipe racks. Covers design, qualification, workmanship, and inspection of welded connections.
AWS D10.12
AWSGuide for Welding Mild Steel Pipe
A practical guide (not a code) for welding low-carbon (mild) steel pipe, covering processes, joint preparation, and technique for non-critical piping.
ISO 15614
ISOSpecification and Qualification of Welding Procedures
Welding procedure specification and qualification by procedure test (the European/ISO system). Part 1 covers arc and gas welding of steels and nickel alloys.
ISO 9606
ISOQualification Testing of Welders
Welder performance qualification testing (the ISO/European system). Part 1 covers fusion welding of steels.
API 1104
APIWelding of Pipelines and Related Facilities
Welding and NDE acceptance for gas and arc welding of transmission and distribution pipelines, including in-service repair; the pipeline counterpart of ASME Section IX.
API RP 577
APIWelding Processes, Inspection, and Metallurgy
Guidance on welding processes, materials behavior, discontinuities, inspection, and welding documentation.