SY 6423.6-2014 石油天然气工业 钢管无损检测方法 第6部分:无缝和焊接(埋弧焊除外)铁磁性钢管纵向和/或横向缺欠的全周自动漏检测
Methods of non-destructive testing of steel pipes for the oil and gas industry - Part 6: Full-circumference automatic leak detection of seamless and welded (except submerged arc welded) ferromagnetic steel pipes for longitudinal and/or transverse imperfec