GB/T 18256-2015
钢管无损检测 用于确认无缝和焊接钢管(埋弧焊除外)水压密实性的自动超声检测方法
Non-destructive testing of steel tubes.Automated ultrasonic testing of seamless and welded (except submerged arc-welded) steel tubes for verification of hydraulic leak-tightness
GBT18256-2015, GB18256-2015