NF A49-875-7:1996 Non destructive testing of steel tubes. Part 7 : automatic full peripheral ultrasonic testing of seamless and welded (except submerged arc welded) steel tubes for the detection of longitudinal imperfections.
2006NF A49-875-7:2006 Non-destructive testing of steel tubes - Part 7 : automatic full peripheral ultrasonic testing of seamless and welded (except submerged arc welded) tubes for the detection of longitudinal imperfections.
1996NF A49-875-7:1996 Non destructive testing of steel tubes. Part 7 : automatic full peripheral ultrasonic testing of seamless and welded (except submerged arc welded) steel tubes for the detection of longitudinal imperfections.