What does "qualified welding procedure" mean?

A "qualified welding procedure" refers to a welding process that has been rigorously tested and validated to ensure that the resultant welds comply with established standards and specifications. This qualification typically involves rigorous examination and testing under controlled conditions, where the welds are subjected to various assessments such as mechanical testing, non-destructive testing, and visual inspections. The goal is to demonstrate that the procedure consistently produces welds meeting specific requirements for strength, durability, and overall quality, ensuring they perform reliably in their intended applications.

Understanding this concept is crucial in the welding industry, as it ensures that welders are using repeatedly successful methods that have proven to meet the necessary technical criteria. Hence, the emphasis on testing and verification is what distinguishes a qualified welding procedure from other procedural standards or guidelines, which may not have undergone such thorough validation.