Production process of spiral steel pipe

Production process of spiral steel pipe Spiral steel pipe is a strip coil as raw material, often warm extrusion molding, automatic double wire-sided submerged arc welding process welded spiral seam steel pipe main production processes are as follows: Production process of spiral steel pipe 1. unwinding board probe: After entering the unwinding plate production line, the first full-board ultrasonic testing. 2. Leveling Milling: The flat steel anvil machine so that the original curl, and then through the edge milling machine for two-sided steel milling, so as to meet the requirements of the plate width, plate edge parallelism and groove shape. 3. shear molding: the steel plate production line along the outer edge of the spiral curl into a tube. 4. butt cut: double-sided submerged arc welding using advanced technology to pre-welding, internal welding, outside welding. Ion foot cut to specification length welded spiral pipe use and so on. 5. visual inspection: by professional and technical personnel to some of the basic parameters to be checked. 6. The ultrasonic flaw detection: internal and external weld and weld on both sides of the base material 100% inspection. 7. X-ray detection: internal and external welds 100% X-ray industrial TV check image processing system to ensure that the use of detection sensitivity. 8. The pressure test: the spiral steel pipe hydrostatic testing machine-by-root test to ensure that the pressure test pipe meet the required standards. 9. chamfering flat head: spiral steel pipe inspection carried out after the pipe end processing, to meet the requirements of the pipe end beveling size 10. Final inspection: ultrasonic and X-ray detection again and spiral steel pipe ends magnetic particle inspection, check if there are problems and welding pipe ends defects. 11. oiled marking: spiral steel pipe after passing were oiled to prevent corrosion, and according to user requirements for marking. Post time: Jun-22-2022