SY/T 6423.6-1999 Non-destructive testing methods for pressure-resistant welded steel pipes used in the oil and gas industry Ultrasonic testing of layered defects in seamless and welded (except submerged arc welding) steel pipes

SY/T 6423.1-1999 The non-destructive testing methods for pressure-bearing welded steel pipes used in the oil and natural gas industry and the radiation testing of weld defects in buried arc welding steel pipes SY/T 6423.2-1999 The non-destructive testing methods for pressure-resistant welded steel pipes used in the oil and natural gas industry include ultrasonic testing of longitudinal defects of welds for resistance welding and induction welding pipes SY/T 6423.3-1999 The non-destructive testing methods for pressure-resistant welded steel pipes used in the oil and natural gas industry include ultrasonic testing of longitudinal and/or transverse defects of the weld seam for buried arc welding steel pipes SY/T 6423.4-1999 Non-destructive testing methods for pressure-bearing welded steel pipes used in the oil and gas industry. Ultrasonic testing of delamination defects near the welds of welded steel pipes SY/T 6423.5-1999 SY/T 6423.5-1999 Nondestructive testing methods for pressure-welded steel pipes used in the oil and natural gas industry - Ultrasonic testing of steel strips/sheets for welding pipe manufacturing SY/T 6423.7-1999 Non-destructive testing methods for pressure-bearing welded steel pipes used in the oil and gas industry Ultrasonic testing of layered defects at the ends of seamless and welded steel pipes

SY/T 6423.6-2014 Petroleum and natural gas industries - Non-destructive testing methods for steel pipes - Part 6: Automatic magnetic leakage testing of longitudinal and/or transverse defects for ferromagnetic seamless and welded (except submerged arc welding) pipes of all diameters