What is one instance where requalification of a PQR/WPS is not needed when using FCAW?

When it comes to the requalification of a Procedure Qualification Record (PQR) or a Welding Procedure Specification (WPS) in the context of FCAW (Flux-Cored Arc Welding), the rules specified in AWS D1.1 provide guidance on when requalification is necessary. The change in travel speed by 10% is considered an allowable adjustment within the parameters of the existing PQR/WPS without necessitating requalification.

This is primarily because minor variations in travel speed, as long as they remain within the specified limits of the original procedure, do not significantly affect the mechanical properties or the integrity of the weld. The code allows for these types of adjustments to enable welders to adapt to varying conditions on the shop floor or project site while maintaining the assurance that the weld quality will remain consistent.

In contrast, changes that significantly alter the welding process parameters, such as increasing welding speeds (beyond 10%) or changing the electrode type, would require requalification since they can potentially lead to differences in weld quality and performance that the original procedure may not cover. Therefore, understanding the nuances of these parameters is crucial for ensuring compliance with the welding code while maintaining flexibility in welding operations.