What inspections are required after submerged arc steel pipe production
(1) Hydrostatic test: The expanded steel pipe is inspected one by one on a hydraulic test machine to ensure that the steel pipe reaches the standard required test pressure. The machine has automatic recording and storage functions; (2) Expansion: Expand the diameter of the submerged arc steel pipe to improve the dimensional accuracy of the steel pipe and improve the stress distribution in the steel pipe; (3) X-ray inspectionⅡ: X-ray industrial television inspection and filming of pipe end welds on steel pipes after diameter expansion and hydraulic pressure tests; (4) Tube end magnetic particle inspection: perform this inspection to find tube end defects; (5) X-ray inspectionⅠ: X-ray industrial television inspection of internal and external welds, using image processing system to ensure the sensitivity of flaw detection; (6) Inspection of internal and external welds of spiral steel pipes and base metal on both sides of welds; (7) Acoustic inspection Ⅱ: Perform sonic inspection one ...