SY/T 6423.4-1999

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 6423.5-1999 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 6423.6-1999 SY/T 6423.7-1999

SY/T 6423.4-2013 Petroleum and natural gas industries - Non-destructive testing methods for steel pipes - Part 4: Automatic ultrasonic testing of defects in seamless and welded steel pipes due to layering

GB/T 9445-1999 Qualification and certification for nondestructive testing personnel 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 6423.5-1999 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