3ISO 5817:2015 Welding-- Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding excluded) -- Quality levels for imperfections.
4ISO 17636:2013 Non-destructive examination of welds - Radiographic testing of fusion-welded joints.
5ISO 17635:2010 Non-destructive examination of welds - general rules for fusion welds in metallic materials.
61SO 6520-1 : 2007 Classification of imperfections in metallic fusion welds with explanations.
7ISO 10675-1:2008 Non-destructive examination of welds - Acceptance levels for Radiographic testing - Part 1: Steel, nickel, titanium and their alloys.
