KS D ISO 9303-2002(2017) Seamless and welded(except submerged arc-welded) steel tubes for pressure purposes-Full peripheral ultrasonic testing for the detection of longitudinal imperfections
2002KS D ISO 9303:2002 Seamless and welded(except submerged arc-welded) steel tubes for pressure purposes-Full peripheral ultrasonic testing for the detection of longitudinal imperfections