This part includes ideas on the subject of the qualification of welding and brazing systems as required through different Code Sections for part manufacture. It additionally covers ideas in terms of the qualification and requalification of welders, brazers, and welding and brazing operators so that they may well practice welding or brazing as required through different Code Sections within the manufacture of elements. Welding and brazing information disguise crucial and nonessential variables particular to the welding or brazing procedure used
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Extra info for 2007 BPVC Section IX - Welding and Brazing Qualifications
1 shall be cross-sectioned as closely as possible through the centerline of the weld. A minimum of 1 in. (25 mm) shall be provided for examination of each longitudinal specimen. The transverse specimens shall be of sufficient length to include weld, the heat-affected zone, and portions of the unaffected base material. Cross-sections shall be smoothed and etched with a suitable etchant (see QW-470), and examined at a minimum magnification of 25X. The dimensions of the fusion zone and penetration of each weld of the transverse specimens shall be measured to the nearest hundredth of an inch and recorded.
These conditions include the base metals that are permitted, the filler metals that must be used (if any), preheat and postweld heat treatment requirements, etc. ” When a WPS is to be prepared by the manufacturer or contractor, it must address, as a minimum, the specific variables, both essential and nonessential, as provided in Article II for each process to be used in production welding. 2 In performance qualification, the basic criterion established for welder qualification is to determine the welder’s ability to deposit sound weld metal.
4(b). When following a WPS that has more than one welding process, filler metal, or set of variables, each process, filler metal, or set of variables may be used individually or in different combinations, provided (1) the essential, nonessential, and required supplementary essential variables associated with the process, filler metal, or set of variables are applied 14 2007 SECTION IX (2) the base metal and deposited weld metal thickness limits of QW-451 for each process, filler metal, or set of variables are applied (b) For GTAW, SMAW, GMAW, PAW, and SAW, or combinations of these processes, a PQR for a process recording a test coupon that was at least 1⁄2 in.
2007 BPVC Section IX - Welding and Brazing Qualifications by ASME