Which document supports the WPS elements in welding practices?

The Procedure Qualification Record (PQR) is integral to welding practices because it serves as a documented record that verifies that the welding procedures outlined in the Welding Procedure Specification (WPS) produce welds that meet the specified mechanical properties and requirements. The PQR contains essential data related to the welding process, including details about the materials, the specific welding parameters used, and the results of mechanical testing performed on the welds.

This document essentially acts as evidence that the procedures specified in the WPS are capable of yielding welds that meet the performance criteria required. Thus, the PQR supports the WPS elements by providing the necessary validation that the procedures are not just theoretical but have been demonstrated to produce satisfactory weld quality in practice.

In contrast, other options like the procedure manual, quality assurance plan, and welding handbook may provide guidance and general information about welding practices but do not necessarily focus on the qualification and performance validation as the PQR does.