What is a Welding PQR? A Complete Guide

A Welding Procedure Qualification Record (PQR) is a formal document that records the results of a test weld, proving that a specific welding procedure produces a joint strong enough for its intended use. In simple terms, it is the evidence that a welding method actually works. If your projects demand compliance and safety, a properly tested PQR is one of the most important documents your business can hold, and our qualification services are built to help you get it right first time.

Understanding what a PQR is, why it matters, and how it fits alongside related documents will help you stay compliant, win contracts and avoid costly rework. If you would like tailored guidance, you can get in touch with our team to discuss your requirements.

What a PQR Actually Is

A PQR captures the real, measured outcome of a qualification test. Before any welding takes place on a critical component, a preliminary welding procedure is drafted. A test piece is then welded under controlled, witnessed conditions using that procedure. The test weld is subjected to rigorous inspection, and the results are documented in the PQR.

Put simply, the PQR is the proof document. It does not tell a welder how to work day to day. Instead, it confirms that the parameters used during the test produced a sound, defect-free weld that meets the required mechanical and metallurgical standards.

Once a procedure passes, the PQR becomes the factual foundation that a Welding Procedure Specification (WPS) is built upon. Without a qualified PQR behind it, a WPS is only a proposal rather than a proven method.

Why a PQR Matters

A PQR is far more than paperwork. It underpins safety, compliance and commercial credibility, particularly in regulated industries where weld failure carries serious consequences.

Safety and Structural Integrity

The core purpose of a PQR is to prove that a weld can withstand its intended operational conditions. Qualification testing measures properties such as tensile strength, ductility and impact resistance. In sectors like rail, marine, aerospace and structural engineering, this evidence directly supports the integrity of the finished product.

Compliance and Insurance

Many primary contractors and insurers require documented proof that welding procedures meet recognised codes. A verified PQR demonstrates due diligence and shows that your processes have been independently tested rather than simply assumed to be fit for purpose.

Winning Work

Increasingly, large organisations will not award tenders to suppliers who cannot demonstrate compliance. Holding correctly qualified procedures signals professionalism and gives clients confidence in your capabilities.

In short: a PQR protects your people, your projects and your reputation.

What Is Recorded in a PQR?

A PQR captures the essential variables and results from the qualification test. While the exact detail depends on the applicable standard, a typical record includes:

• Welding process used, such as MIG, TIG or MMA
• Base material type, grade and thickness
• Filler materials and consumables used during the test
• Key welding parameters, including current, voltage and travel speed
• Joint design and welding position
• Preheat and interpass temperatures where relevant
• Test results from both non-destructive and destructive testing

The results section is critical. Non-destructive testing checks for surface and internal defects, while destructive testing physically examines the weld through methods such as tensile, bend and impact tests. Only when the sample passes all required checks is the procedure considered qualified.

How a PQR Is Created

Producing a reliable PQR follows a clear, structured process. Understanding these stages helps clarify why independent oversight matters so much.

1. Draft a preliminary procedure. A proposed method is prepared, setting out the intended variables and approach.
2. Weld the test piece. A welder produces a test coupon under controlled conditions, following the preliminary procedure precisely.
3. Witness the test. An independent surveyor observes the welding to verify that it genuinely follows the stated parameters.
4. Inspect and test the sample. The coupon undergoes non-destructive and destructive testing against the relevant standard.
5. Document the results. The verified outcomes are recorded in the PQR, confirming whether the procedure is qualified.

Independent witnessing is what gives a PQR its weight. Anyone can claim a procedure works, but a witnessed, tested and documented record provides objective proof that stands up to scrutiny from auditors, insurers and clients.

PQR vs WPS vs Welder Qualification

These three terms are often confused, yet they serve very different purposes. Getting them straight is one of the most useful things you can do when managing welding compliance.

To summarise the relationship: the PQR is the proof, the WPS is the instruction derived from that proof, and the welder qualification confirms that the person carrying out the work is competent to do so. A robust quality system usually needs all three.

Standards Commonly Involved

The correct standard depends on your industry, material and location. As an experienced provider, we regularly guide businesses through the codes that apply to procedure qualification, including:

• BS EN ISO 15614 (all parts) for the specification and qualification of welding procedures for metallic materials
• BS EN ISO 15613 for qualification based on a pre-production welding test
• ASME Boiler and Pressure Vessel Code (BPVC) Section IX for welding, brazing and fusing qualifications
• BS ISO 17779 for the specification and qualification of brazing procedures

Choosing the right standard from the outset avoids wasted testing and ensures your documentation is recognised wherever your work takes you. If you are unsure which applies, a short conversation with a specialist can save considerable time and expense.

Why Use an Expert Provider

Qualification testing is precise work, and small errors can invalidate an entire procedure. Working with a knowledgeable partner ensures your PQR is produced correctly, efficiently and to the appropriate standard.

Rambaldini Welding provides independent witnessing, weld testing and full documentation support as part of tailored qualification services. Founded by Jake Rambaldini in 2016 and run as a family business, the company assesses your needs carefully and conducts only the essential tests required for compliance and job performance, helping you avoid unnecessary procedures and cost. You can learn more about our team and approach and how we support businesses across regulated sectors.

Our credentials reflect that commitment to quality. We were named Best Welder Training and Qualification Provider 2024 at the SME News UK Enterprise Awards, hold ISO 9001 management systems certification, and maintain a 5.0 Google rating based on 14 reviews. We deliver services both on-site at your premises and from our fully equipped facilities in Northamptonshire, supporting industries including construction and structural engineering, rail, marine, aerospace, oil and gas, and energy and power. For a wider view of what we offer, visit our main website.

If you would like a deeper look at how qualification protects your projects, our guide on the importance of welding procedure qualification is a useful next read.