SY/T 6423.8-2017 石油天然气工业 钢管无损检测方法 第8部分：无缝和焊接（埋弧焊除外）钢管纵向和/或横向缺欠的全周自动超声检测

SY/T 6423.8-2017 Petroleum and natural gas industries - Pipe inspection methods for the non-destructive testing of seamless and welded (except submerged-arc welding) steel pipes - Part 8: Automatic full-circumference ultrasonic testing for the detection of longitudinal and/or transverse defects in seamless and welded (except submerged-arc welding) steel pipes