According to API 1104, the welding procedure must be requalified when changing to a different brand of filler metal with a higher tensile strength, even if it remains within the same AWS classification.
Explanation
API 1104 outlines the qualifications for welding procedures, focusing on factors such as material changes, filler metal properties, and tensile strength. Specifically, when switching to a different brand of filler metal that offers higher tensile strength, the procedure must be re-evaluated. This requirement exists because even though the filler metal may fall within the same AWS classification, variations in composition and mechanical properties can affect the weld integrity. Additionally, it emphasizes the need for stringent quality control in aspects like joint design and welding technique, where the strength differences can be critical. Thus, the claim holds true as this stipulation in API 1104 ensures safety and integrity in welding applications, making it a necessary practice to prevent potential failures in structural applications.
Key Points
- API 1104 requires requalification of welding procedures under specific conditions, such as changing filler metal brand.
- Higher tensile strength in filler metal could imply potential differences in weld performance, necessitating requalification.
- Remaining within the same AWS classification does not exempt the procedure from requalification requirements.
