What is the purpose of a PQR in welding procedure qualification?

What is the purpose of a PQR in welding procedure qualification?

• A. To store purchase orders
• B. To document test results and the welding variables that demonstrate the procedure is qualified
• C. To plan production runs
• D. To record supplier contacts

Answer: (B)

The main idea is that a PQR is the formal proof that a welding procedure, when used under defined conditions, can produce qualified welds. It records the actual test welds and the exact welding variables used—everything from the process, base and filler metals, joint design, material thickness, and welding positions, to preheat, interpass temperature, post-weld heat treatment, and the electrical and travel parameters (current, voltage, travel speed). It also captures the test results and how they meet the required acceptance criteria (such as tensile, bend, macro, hardness, or nondestructive tests). This documentation shows that the procedure is capable and provides the basis for the Welding Procedure Specification, by identifying the essential variables and their approved ranges to reproduce qualified welds in production. It isn’t about administrative tasks like purchasing, production planning, or recording supplier contacts.

The main idea is that a PQR is the formal proof that a welding procedure, when used under defined conditions, can produce qualified welds. It records the actual test welds and the exact welding variables used—everything from the process, base and filler metals, joint design, material thickness, and welding positions, to preheat, interpass temperature, post-weld heat treatment, and the electrical and travel parameters (current, voltage, travel speed). It also captures the test results and how they meet the required acceptance criteria (such as tensile, bend, macro, hardness, or nondestructive tests). This documentation shows that the procedure is capable and provides the basis for the Welding Procedure Specification, by identifying the essential variables and their approved ranges to reproduce qualified welds in production. It isn’t about administrative tasks like purchasing, production planning, or recording supplier contacts.