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See Chinese contents: GB/T 5777-2019 GB/T 5777-2019: [Including 2021XG1] Automated full peripheral ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections
This Standard specifies the requirements for automated full peripheral ultrasonic transverse wave (generated by conventional or phased array technology) testing of seamless and welded (except submerged arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections.
