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Visual testing is the first step in checking a weld. It is cheap and fast.
Magnifying glasses (2x to 5x magnification), Borescopes, Endoscopes iso 17637 pdf
The surface illumination must be a minimum of 350 lx .
If you’d like, I can:
Complete cleaning between weld runs or passes.
The standard outlines specific requirements for testing conditions and personnel to maintain consistency and accuracy. This public link is valid for 7 days
Detects defects early, before more expensive, destructive, or NDT methods (like radiography) are used.