How often should welding procedure qualifications be re-evaluated?

Welding procedure qualifications should be re-evaluated whenever there is a significant change in process or materials. This ensures that the welding procedures remain effective and safe under the new conditions. Changes can include alterations in the base materials being used, variations in the welding process (such as different techniques or equipment), or modifications in the design of the welded structure.

Re-evaluating the welding procedures under these circumstances is critical because these factors can impact the mechanical properties of the weld, the performance of the materials involved, and ultimately the integrity of the pipeline or facility. Regularly updating and confirming the validity of the welding procedures in response to significant changes helps ensure the continued safety and reliability of the welding operation.