PQR/WPS Preparation

Welding Procedure Specification (WPS) and Procedure Qualification Record (PQR) Preparation:

Welding Procedure Specification (WPS):

A Welding Procedure Specification (WPS) is a critical document that outlines the procedures and parameters for welding operations. It provides detailed guidance on welding variables to ensure that the welds meet the required quality and mechanical properties. Each WPS is tailored to specific material alloys and welding techniques, and it is developed based on relevant codes and engineering standards.

Procedure Qualification Record (PQR):

A Procedure Qualification Record (PQR) documents the welding data used to create a test coupon. The PQR demonstrates that the welding process produces welds with the correct mechanical and metallurgical properties. It is an essential component in validating the effectiveness of the WPS.

PQR/WPS Preparation Process:

1. Develop a Welding Procedure Specification (WPS): Create a detailed WPS based on industry standards such as ASME Sec IX, ISO 15609, or AWS D1.1. This document outlines the welding parameters and procedures to be used.

2. Conduct Welding and Inspection: Weld a test piece following the specifications outlined in the WPS. A certified welding inspector, such as an AWS Certified Welding Inspector (CWI), witnesses the welding process and records the welding data, including current settings and pre-heat conditions.

3. Perform Testing: The test piece undergoes both Destructive Testing (DT) and Non-Destructive Testing (NDT), including radiographic and mechanical tests, as specified by the welding procedure standard. These tests are conducted in a qualified laboratory, with the Inspection Body potentially witnessing the tests and reviewing radiographs.

4. Document and Endorse: If the test results are successful, complete the necessary documentation. The test body’s surveyor reviews, signs, and endorses the documents, validating the procedure.

ARTISTIC WELDING

INDUSTRIAL WELDING

Architectural Welding

Stainless Steel Welding

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When to Schedule PQR/WPS Preparation

Effective scheduling of PQR/WPS preparation is crucial to ensure optimal outcomes and compliance with industry standards. Consider the following:

New Project Initiation

Schedule PQR/WPS preparation at the start of a new project to establish welding procedures that meet specific project requirements and ensure quality from the beginning.

Material Change

Perform PQR/WPS preparation whenever there is a change in material types or grades to ensure that the welding procedures are appropriate for the new materials.

Regulatory Updates

Conduct PQR/WPS preparation when industry standards or regulations are updated to ensure that your welding procedures remain compliant.

Quality Improvement Initiatives

Schedule PQR/WPS preparation as part of quality improvement initiatives to refine existing welding procedures and enhance overall welding quality.

Common Questions

Most Popular Questions.

Find answers to frequently asked questions about our inspection services, including processes, benefits, and scheduling tips.

Why is PQR/WPS preparation important?

PQR/WPS preparation ensures that welding procedures are standardized, compliant with industry standards, and capable of producing high-quality welds.

What testing is required for a PQR?

A PQR requires both Destructive and Non-Destructive Testing, including radiographic and mechanical tests, to ensure that the welds meet the specified properties.

What is a Welding Procedure Specification (WPS)?

A WPS is a detailed document that outlines the welding procedures and parameters needed to achieve high-quality welds. It ensures consistency and compliance with industry standards.

What is a Procedure Qualification Record (PQR)?

A PQR is a record of the welding data used to produce a test coupon. It verifies that the welding process produces welds with the required mechanical and metallurgical properties.