Iso 17637 Pdf

The weld does not go through the entire joint. Excessive Reinforcement: Too much weld metal.

Testers watch the welding process. They check each layer of weld metal. They look for dirt trapped inside the weld. They make sure the temperature stays correct. 3. After Welding

Complete Guide to ISO 17637: Non-Destructive Testing of Welds iso 17637 pdf

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For multi-pass welds, inspection occurs between subsequent weld layers. The inspector monitors: The weld does not go through the entire joint

There — just beneath the toe of the weld, running parallel to the joint — a hairline crack. Not yet open to the surface, but visible under magnification. The standard’s Table 2 was explicit: any crack, regardless of size, is unacceptable for Class B.

: Look for unacceptable profile defects such as undercut, excessive reinforcement, lack of fusion, stray arcs, or surface porosity. They check each layer of weld metal

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ISO 17637 is the international standard governing the visual testing (VT) of fusion-welded joints in metallic materials. Visual inspection is the most fundamental, cost-effective, and critical first step in any non-destructive testing (NDT) workflow.

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