EN 10246-7:2005 钢管的无损检验.第7部分:纵向缺陷探测用无缝焊接钢管(埋弧焊除外)的自动全周界超声波检验
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