Hebei ChongSheng Special Steel Pipe Co.,Ltd.

Spiral pipe production technology

Spiral Pipe is a strip coil as raw material, often warm extrusion molding, automatic two-sided double wire submerged arc welding process Welded. Spiral steel raw materials that strip, wire, flux. Before go through rigorous physical and chemical inputs Inspection. Strip head and tail docking, using single or double wire submerged arc welding, in rolled steel by automatic submerged arc welding .

By external or internal control roll forming. After welding the weld line continuous ultrasonic injury checks to ensure 100% coverage of non-destructive testing of welds spiral. If defective, automatic alarm and spraying tags, according to production workers This always adjusting the process parameters, and remove defects. Former spiral pipe forming, strip after flattening, cutting, trimming, planing, surface cleaning and transportation to the curved edge treatment. Control the use of electrical contacts on both sides of the conveyor cylinder pressure, ensuring the smooth delivery of the strip. The welding and Outside the United States Lincoln welding machine carbon seamless steel pipe manufacturer china welding are used for single or double wire submerged arc welding, to obtain stable welding specifications.

Using air plasma cutting machine to cut a single tube. The weld gap between the control device to ensure that the weld Gap welding requirements to meet, diameter, volume and the wrong side of the weld gap have been strictly controlled. There is a continuous sonic weld inspection mark on the site, manual ultrasonic and X-ray review, if there are defects , After the patch, again through non-destructive testing, until confirmed defects have been eliminated. After each pipe hydrostatic test Experience pressure radial seal. Test pressure steel pipe pressure and time by computer testing device strictly controlled. Test Parameters are automatically printed record.

Steel butt weld pipe and where the spiral weld intersects with D-type connectors, all through the X-ray television or shoot Film examination. Cut into a single pipe, each batch of steel should be carried out strict inspection system, the mechanical properties of the weld inspection , Chemical composition, fusion status, steel surface quality and after NDT inspection process to ensure that after passing the pipe To formally put into production. Pipe end machining, so that the end vertical, blunt edge bevel and accurate control.

Hebei ChongSheng Special Steel Pipe Co.,Ltd.