This Japanese Industrial Standard relates to ``employer qualifications and certification'' for people engaged in NDT work when steel manufacturers conduct product inspections of steel products.
JIS G 0431:2001 history
2021JIS G 0431:2021 Steel products -- Employer's qualification system for non-destructive testing (NDT) personnel
2009JIS G 0431:2009 Steel products -- Employer's qualification system for non-destructive testing (NDT) personnel
2001JIS G 0431:2001 Qualification and certification of non-destructive testing (NDT) personnel for steel products