Is PQR require for qualifying WPS?

Yes, PQR (Procedure Qualification Record) is required for qualifying a WPS (Welding Procedure Specification). The PQR documents the results of welding tests performed to validate that the proposed welding procedure can produce welds meeting specified requirements. By establishing the parameters and performance of the welding process, the PQR ensures that the WPS can reliably produce welds of the desired quality and performance under specified conditions.