Visual testing is the foundation of weld quality control. Before applying advanced non-destructive testing (NDT) methods like radiography or ultrasonics, a thorough visual inspection must occur. ISO 17637 is the international standard governing this critical process.
ISO 17637 is an international quality standard. It sets the rules for examining welds with your eyes. This process is called visual testing.
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The most current and widely used version of the standard is , titled Non-destructive testing of welds — Visual testing of fusion-welded joints . iso 17637 pdf
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ISO 17637 outlines how to perform the visual inspection, but it does not specify whether a weld passes or fails. To determine acceptance, inspectors use ISO 17637 in tandem with .
It spots cracks, holes, and bad shapes right away. Saves money: Fixing a weld early costs less cash. Visual testing is the foundation of weld quality control
Name of the inspection company, date of testing, and unique report number.
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Magnifying glasses (2x to 5x magnification), Borescopes, Endoscopes ISO 17637 is an international quality standard
Final report records the material, welding process, imperfections found, and acceptance level achieved.
: As the weld is built up, ISO 17637 requires that each weld pass or layer be visually examined before it is covered by the next pass. The inspector must check for cleanliness between passes and look for any visible defects such as cracks, porosity, or lack of fusion. If a defect is found, the standard requires that it be reported and appropriate remedial actions be taken before welding can continue.