This part comprises principles in terms of the qualification of welding and brazing methods as required by means of different Code Sections for part manufacture. It additionally covers principles on the subject of the qualification and requalification of welders, brazers, and welding and brazing operators so they could practice welding or brazing as required via different Code Sections within the manufacture of parts. Welding and brazing facts conceal crucial and nonessential variables particular to the welding or brazing method used
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Additional resources for 2007 BPVC Section IX - Welding and Brazing Qualifications
Each specimen of the set shall be tested and meet the requirements of QW-153. 4 Full-Section Specimens for Pipe. 1(e) may be used for testing pipe with an outside diameter of 3 in. (75 mm) or less. QW-152 Tension Test Procedure The tension test specimen shall be ruptured under tensile load. The tensile strength shall be computed by dividing the ultimate total load by the least cross-sectional area of the specimen as calculated from actual measurements made before the load is applied. 2 Reduced Section — Pipe.
B) Contents of the WPS. The completed WPS shall describe all of the essential, nonessential, and, when required, supplementary essential variables for each welding process used in the WPS. These variables are listed in QW-250 through QW-280 and are defined in Article IV, Welding Data. 2. The manufacturer or contractor may include any other information in the WPS that may be helpful in making a Code weldment. (c) Changes to the WPS. Changes may be made in the nonessential variables of a WPS to suit production requirements without requalification provided such changes are documented with respect to the essential, nonessential, and, when required, supplementary essential variables for each process.
Collectively, all of the specimens required to represent the full thickness of the weld at one location shall comprise a set. 1 Tensile Strength. Minimum values for procedure qualification are provided under the column heading “Minimum Specified Tensile, ksi” of table QW/QB-422. In order to pass the tension test, the specimen shall have a tensile strength that is not less than (a) the minimum specified tensile strength of the base metal; or (b) the minimum specified tensile strength of the weaker of the two, if base metals of different minimum tensile strengths are used; or 4 2007 SECTION IX (c) the minimum specified tensile strength of the weld metal when the applicable Section provides for the use of weld metal having lower room temperature strength than the base metal; (d) if the specimen breaks in the base metal outside of the weld or weld interface, the test shall be accepted as meeting the requirements, provided the strength is not more than 5% below the minimum specified tensile strength of the base metal.