NF A89-511-1:2006 Non-destructive testing of welds - Part 1 : Evaluation of welded joints in steel, nickel, titanium and their alloys by radiography - Acceptance levels.
2013NF A89-511-1:2013 Non-destructive testing of welds - Acceptance levels for radiographic testing - Part 1: steel, nickel, titanium and their alloys
2006NF A89-511-1:2006 Non-destructive testing of welds - Part 1 : Evaluation of welded joints in steel, nickel, titanium and their alloys by radiography - Acceptance levels.
1998NF A89-511:1998 Non-destructive examination of welds. Radiographic examination of welded joints. Acceptance levels.