FAQ

Nondestructive Testing of Weld Seam in Large Diameter Seamless Steel Tube

Nondestructive testing of welds within large-diameter seamless steel tubes: Since the pipe is of extra large steel pipe in the water supply project, steel pipes with a thickness of t = 30mm are used as pipe bridges, and are subject to internal water pressure and Steel pipe weight and the formation of water body bending moment, so the quality of the welding requirements of extraordinary high.

For large diameter seamless steel pipe pipe with t = 30mm thick steel pipe, the longitudinal seam and ring joints are belong to a class of welds, requiring 100% X-ray film inspection and 100% ultrasonic inspection; Thickness t = 24mm buried steel pipe, longitudinal seam is a class of welding, 20% of the X-ray film inspection and 50% of the ultrasonic testing.

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