Hebei ChongSheng Special Steel Pipe Co.,Ltd.

Straight seam submerged arc welded steel pipe production process

Straight seam steel pipe is parallel to the longitudinal weld and pipe. Usually divided into metric welded steel pipe, welded tube, transformer cooling pipes and so on. Straight seam steel pipe production process is simple, high efficiency, low cost, rapid development. Spiral Welded Longitudinal generally higher than that, can narrow the billet production of large diameter pipe, you can also use the same width of the billet production of different pipe diameters.

However, compared with the same length of straight seam pipe, weld length of 30 to 100%, and lower production rate. Straight seam submerged arc welded pipe production process: Board probe: used to manufacture large diameter submerged arc after straight seam steel pipe into the production line, the first full-board ultrasonic testing. Milling: Milling machine through the two-sided edge of the milling plate, so as to meet the requirements of the plate width, the plate sides parallel to the groove shape and degree. Pre-curved side: the use of pre-bending machine pre-bending plate edge, the edge of the plate has to meet the requirements of curvature.

Molding: Molding Machine On JCO half pre-bending a steel sheet after the first step after repeated pressing, pressed into a J shape, carbon seamless steel pipe manufacturer china and then the other half of the same steel plate bent into a C-shaped press, and finally the formation of the O-shaped opening. Pre-welding: make a straight seam welded steel pipe seam after forming and using gas welding (MAG) for continuous welding. The weld: A tandem multi-wire submerged arc welding (up to four wire) on the inside straight seam welded steel pipe.

Weld: A tandem multi-wire submerged arc welding steel pipes in straight seam submerged arc welding outside. Ultrasonic Inspection Ⅰ: straight seam welded steel pipe for internal and external sides of the weld metal and base metal welds 100% inspection. X-ray inspection Ⅰ: 100% weld on the inside and outside of the X-ray industrial TV inspection, using an image processing system to ensure detection sensitivity.

Full larger diameter pipe to increase the dimensional accuracy and improved distribution of the steel sheet 50 # stress. Hydrostatic Test: On the hydraulic test machine for steel after expanding by-root test to ensure that the pipe to test pressure requirements of the standard, the machine has an automatic recording and storage capabilities.

Hebei ChongSheng Special Steel Pipe Co.,Ltd.