CSA W59-18 Welded steel construction.
3 General requirements
3.1 Qualification requirements
3.1.1 Contractor
When mandated in the contract or in the governing design Standard*, all contractors performing work under this Standard shall comply with CSA W47.1 for welded fabrications.
* Examples: CSA S6 and CSA S16.
3.1.2 Welding processes
This Standard covers the following processes:
a) shielded metal arc welding (SMAW);
b) submerged arc welding (SAW);
c) gas metal arc welding (GMAW);
d) gas tungsten arc (GTAW);
e) flux-cored arc welding (FCAW);
f) metal-cored arc welding (MCAW);
g) electroslag welding (ESW);
h) electrogas welding (EGW); and
i) stud welding (SW).
Filler metals and allied materials for the various processes shall conform to the requirements set forth in CSA W48, except for stud welding, which shall conform to the requirements of Clause of this Standard. Joint details may depart from those prescribed in Clause 10, only if the contractor has the proposed joint and joint welding procedure qualified in accordance with the requirements of CSA W47.1. A combination of the welding processes listed in Clause may be used to weld a joint deemed as prequalified under the requirements of Clause 10. In such instances, the joint geometry shall meet the provisions of Clause 10 for both processes; when this occurs, the joint shall be deemed as prequalified and, therefore, shall be approved for use without performing welding procedure qualification tests. 3.1.4 Selection oftype ofgroove and welding procedures Unless otherwise specified in the contract documents, the selection of the type of groove, the geometry of preparation, the welding process, and the related welding procedures shall be the responsibility of the contractor’s engineer. 3.2 Base metal 3.2.1 General Steel base metal to be welded under this Standard shall conform to the requirements of the CSA or ASTM Standards listed in Clauses 3.2.2 and 3.2.3 or other recognized specifications of equivalent welding quality as determined by the contractor’s engineer and approved by the engineer. Equivalent welding quality shall be established on the basis of composition and carbon equivalent. Carbon equivalent shall be determined in accordance with the International Institute of Welding formula: CE IIW = C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15
CSA W59 pdf download.