Structural weld inspection: what sampling ratio is right?
王工
Verified member · Service engineer
The client wants 100% ultrasonic testing on boom and swing platform welds.
Full inspection adds about six hours per machine and visible cost.
What ratio is usual, and how do you split critical from standard parts?
Discussion (3)
Mr. LiuVerified member · Service engineer2026-10-22
Full inspection of load-bearing welds is reasonable; 20% sampling on standard parts is usually accepted.
Paulo M.Verified member · Project chief engineer2026-10-23
Supplying welding procedure qualification and welder certificates proves quality better than a higher ratio.
Ade O.Verified member · Procurement lead2026-10-24
Cost can go into the quotation; what matters is that reports are truthful and sampling records kept.
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