SY/T 6423.3-2013
石油天然气工业钢管无损检测方法第 3部分:焊接钢管用钢带/钢板分层缺欠的自动超声检测
Petroleum and natural gas industries.Non-destructive testing (NDT) methods of steel tubes.Part 3: Automated ultrasonic testing for the detection of laminar imperfections in strip/plate used for the manufacture of welded steel tubes