WPS & WPQR

Introduction

In the world of welding, two documents play a crucial role in ensuring quality and consistency: the Welding Procedure Specification (WPS) and the Procedure Qualification Record (PQR). These documents are essential for inspection companies to understand and monitor the welding process.

Welding Procedure Specification (WPS)

A WPS is a document that describes how welding is to be carried out in production. It allows welders to consistently produce welds that meet desired requirements without any rework. The WPS outlines the specific procedures that will be used to weld a particular joint. It includes details such as the joint design, welding materials, parameters, and technique5.

Procedure Qualification Record (PQR)

The PQR is a document that records the results of actually welding a joint using the specified procedures outlined in the WPS. It is required when it is necessary to demonstrate that your company has the ability to produce welds possessing the correct mechanical and metallurgical propertie. The PQR is essentially a checklist to ensure that the instructions in the WPS were satisfactorily met.

Standards: EN, ASME, and AWS

The WPS and PQR must be qualified in accordance with the requirements of an appropriate welding procedure standard, such as EN (European Norm), ASME (American Society of Mechanical Engineers), and AWS (American Welding Society). These standards define the procedure qualification process, including the format and function of a WPS and a PQR, the different types of WPSs, essential and nonessential variables for various welding procedures, and the information included on a PQR.

Conclusion

Understanding the WPS and PQR is crucial for inspection companies to ensure the quality and consistency of welding operations. By adhering to the guidelines set by EN, ASME, and AWS, companies can ensure that their welding procedures meet the highest standards of quality and safety.

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