Welding Procedure Qualification Record
The procedure qualification is a documented record of the practical execution and successful testing of a weld to confirm the validity of the welding procedure specifications.
Physical-Chemical Working Mechanism
The procedure qualification verifies the actual execution of the welding procedure based on set criteria. This includes both non-destructive testing (e.g., ultrasonic) and destructive testing (e.g., zinc flow test) to confirm the quality and hardness of the weld.
Metallurgical Relevance & Welding Risks
A failed procedure qualification can lead to insufficiently welded spots, which may cause cracks or failures. This increases the risk of safety issues and can lead to extra costs from re-welding or repairs.
Workshop Practice & Instructions
To ensure a successful procedure qualification, the weld must be carefully checked using the specified test methods. This includes determining hardness (e.g., Rockwell hardness), checking for cracks and porosity, and confirming the correct execution of the welding procedure. It is important to document all tests for a traceable record.