Spiral Steel pipe in the inspection process need to pay attention to matters

　　1, oiling marking: in the inspection of qualified spiral pipe oiling operation to prevent corrosion, and in accordance with the requirements of customers marking.

　　2, flatten milling edge: the use of anvil machine will be the original curled steel plate leveling, and then through the milling machine on both sides of the steel plate for double-sided milling, to achieve the required plate width, parallel side of the board and groove shape.

　　3, shear molding: the steel plate along the Large Diameter SSAW Spiral Welded Steel Pipe into a tube.

　　4, butt welding: double-sided submerged arc welding technology for pre-welding, welding, welding. The welded steel pipe was cut into a standard length using a plasma scale.

　　5, visual inspection: by the professional and technical personnel to check some of the basic parameters.

　　6, ultrasonic testing: both inside and outside the weld and weld on both sides of the base metal 100% inspection.

　　7, X-ray inspection: the inside and outside the weld 100% X-ray industrial TV inspection, the use of image processing system to ensure the sensitivity of testing.

　　8, the pressure test: the hydraulic test machine on the steel pipe by root inspection to ensure that the steel pipe to meet the standard requirements of the test pressure.

　　9, chamfering head: the inspection will be qualified after the spiral pipe pipe processing, to achieve the required pipe end groove size.

　　10. Final inspection: re-ultrasonic and X-ray inspection and the end of the magnetic test, check the existence of welding problems and pipe terminal defects.