石油天然气工业 钢管无损检测方法 第2部分:焊接钢管焊缝纵向和/或横向缺欠的自动超声检测
Petroleum and natural gas industries-Non-destructive testing(NDT)methods of steel tubes-Part 2:Automated ultrasonic testing of the weld seam of welded steel tubes for the detection of longitudinal and/or transverse imperfections