Iso 17637 Pdf Official

Testing during the welding process (e.g., checking individual runs or layers). Final inspection of the completed weld. Inspection of repaired welds.

A: Optical aids up to 10x are explicitly mentioned. For higher magnification, it is no longer "visual testing" in the sense of this standard (it becomes a microscopic examination). iso 17637 pdf

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. Testing during the welding process (e

The librarian, a kindly woman named Priya, photocopied the relevant tables for surface imperfections: Classes B, C, and D for different service conditions. Class B was for the cryogenic tank — the strictest. Undercut depth: max 0.5 mm. Porosity: no isolated pore greater than 1 mm. No crack of any size. A: Optical aids up to 10x are explicitly mentioned