Navigating the Test Requirements for Weld （导航测试要求焊缝）.pdf

Navigating the Test Requirements for Weld Procedure Qualifications by Franco du Plessis OVERVIEW • Welding codes and standards • Procedure documentation • Qualification process flow • Types of testing • Test requirements • Conclusion WELDING CODES AND STANDARDS PROCEDURE DOCUMENTATION Qualification requires the formulation of three universally recognized documents: • pWPS – Preliminary Welding Procedure Specification. • WPQR – Welding Procedure Qualification Record. • WPS – Welding Procedure Specification. OVERVIEW OF THE pWPS pWPS – Preliminary Welding Procedure Specification. • Produced by the companies welding engineer or responsible welding coordinator. • A reference document used by the welder to complete the welding procedure qualification test piece. • Containing key variables of the welding procedure to be qualified. • Dimensions • Joint configuration • Consumable type • Current • Voltage • Travel speed • Based on knowledge and / or past experience. pWPS EXAMPLE OVERVIEW OF THE WPQR WPQR – Welding Procedure Qualification Record. • Is a set of documents comprising the WPS detailing: • The actual welding parameters recorded during the qualification testing as noted on the pWPS. • Results of any non-destructive and destructive tests. • Material certification for the test piece. • The range of the qualification if all tests are satisfactory. • Based on the range of qualification a single WPQR may be used to qualify a various number of WPS’. • Essentially the WPQR is a documentary evidence to prove that the welding parameters used in the qualification test piece do not adversely effect the mechanical properties of the material. WPQR EXAMPLE OVERVIEW OF THE W