Welding Procedures and Qualifications for NACE MR0175/ISO 15156 Compliance

This page provides answers to inquiries related to welding procedures and qualifications to meet NACE MR0175/ISO 15156, Part 2, and NACE TM0177.

Do I Need to Test Welding Procedures Qualified in Accordance with A.2.1.4 with NACE TM0177?

The first question concerns the necessity of testing welding procedure qualifications in accordance with NACE TM0177 if they are already qualified in accordance with NACE MR0175/ISO 15156, Part 2, Item A.2.1.4. The answer confirms that if the WPSs are qualified in accordance with A.2.1.4, testing them in accordance with NACE TM0177 is not necessary.

What Are the Results of Testing Welding Procedures Qualified to Conform to NACE MR0175/ISO 15156 with NACE TM0177?

The second question asks what kind of results would occur if testing WPSs in accordance with NACE TM0177, which have already been qualified to conform to NACE MR0175/ISO 15156. The answer explains that testing welds in accordance with A.2.1.4 is an optional activity to confirm resistance to cracking, and the results could be used to confirm the adequacy of hardness control specified in A.2.1.4 or to define alternative weld hardness control requirements to prevent sulfide stress cracking.

This question pertains to NACE MR0175/ISO 15156-1 Clause 7, and the reference cited is ISO 15156 Maintenance Panel Inquiry #2005-08 Q1, Q2, and Q3.