GB/T 5777-2019 Automated full peripheral ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections
2019GB/T 5777-2019 Automated full peripheral ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections
2009GB/T 5777-2008 Ultrasonic testing method for seamless steel pipe
1996GB/T 5777-1996 Seamless steel pipe and tubing--Methods for ultrasonic testing