EN 10246-7:2005 鋼管的無損檢驗.第7部分:縱向缺陷探測用無縫焊接鋼管(埋弧焊除外)的自動全周界超聲波檢驗
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