Spiral steel pipe is the raw material to strip coil as raw material, shock temperature extrusion molding, automatic double wire double-sided submerged arc welding process into a spiral seam steel pipe. Raw materials that are coil, welding wire, flux, before the investment must undergo a rigorous physical and chemical testing, with head and tail docking.
The use of single-wire or double-wire submerged arc welding, rolled into steel pipe after the use of automatic submerged arc welding, before forming, the strip after leveling, cutting edge, planing, surface cleaning and bending to deal with the use of electrical contact Pressure gauge control conveyor pressure on both sides of the cylinder to ensure the smooth transmission of the strip, the use of controlled or internal control roll forming, the use of weld gap control device to report the weld gap to meet the welding requirements.Spiral Pipe
Diameter, and the gap between the gap are tightly controlled, within welding and external welding, are using the United States Lincoln welding machine for single or double wire submerged arc welding, in order to obtain a stable welding specifications, welding the weld Have been on-line continuous ultrasonic automatic injury inspection, to ensure that 100% of the spiral weld nondestructive testing coverage.
If there is a defect, automatic alarm and eject the mark, the production workers at any time to adjust the process parameters, the timely elimination of defects, the use of air plasma cutting machine, the steel pipe cut into single, cut into a single steel pipe, Strict inspection system, check the weld mechanical properties, chemical composition, fusion conditions, just the surface quality and after nondestructive testing to ensure that the pipe system qualified, in order to formally put into production.Spiral Pipe
The weld has a continuous acoustic flaw mark on the site, after manual ultrasound X-ray review, if there are defects, after repair, after a nondestructive test, until the confirmation of the defect has been eliminated, the strip on the weld and spiral weld The intersection of the streets of the streets, all through the X-ray TV or film inspection, no root steel pipe through the hydrostatic pressure test, the pressure using radial seal, the test pressure by the steel pipe hydraulic microcomputer detection device strictly control the test parameters Automatic printing records, pipe end machining, so that the vertical face, groove angle and blunt edge to be accurately controlled, spiral steel pipe spiral steel pipe and its standard classification, pressure fluid delivery.Spiral Pipe