This part includes principles on the subject of the qualification of welding and brazing approaches as required by way of different Code Sections for part manufacture. It additionally covers ideas on the subject of the qualification and requalification of welders, brazers, and welding and brazing operators so that they may well practice welding or brazing as required via different Code Sections within the manufacture of parts. Welding and brazing facts hide crucial and nonessential variables particular to the welding or brazing procedure used
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Extra resources for 2007 BPVC Section IX - Welding and Brazing Qualifications
The mockup welds shall be sectioned through the center of the tube for macro-examination. The four exposed surfaces shall be smoothed and etched with a suitable etchant (see QW-470) to give a clear definition of the weld and heat-affected zone. Using a minimum of 10X magnification, the exposed cross sections of the weld shall confirm (a) minimum leak path dimension required by the design (b) no cracking (c) complete fusion of the weld deposit into the tubesheet and tube wall face (d) complete penetration of the weld deposit to within 1 ⁄64 in.
Pipe with its axis inclined at 45 deg to horizontal and rotated during welding so that the weld metal is deposited from above and at the point of deposition the axis of the weld is horizontal and the throat vertical. 6, illustration (a). QW-142 Special Examinations for Welders Radiographic examination may be substituted for mechanical testing of QW-141 for groove-weld performance qualification as permitted in QW-304 to prove the ability of welders to make sound welds. 2 Horizontal Positions 2F and 2FR (a) Position 2F.
2007 SECTION IX PART QW WELDING ARTICLE I WELDING GENERAL REQUIREMENTS QW-100 toughness qualification of the WPS, the applicable supplementary essential variables must be addressed in the WPS. The purpose for qualification of a WPS is to determine that the weldment proposed for construction is capable of providing the required properties for its intended application. Welding procedure qualification establishes the properties of the weldment, not the skill of the welder or welding operator. The Procedure Qualification Record (PQR) documents what occurred during welding the test coupon and the results of testing of the coupon.