(1) The volume of raw materials that strip, wire, flux. Before the investment must go through rigorous physical and chemical testing. 
 (2) strip head and tail docking, single or twin-wire submerged arc welding wire, rolled into a tube after the automatic submerged arc welding. 
 (3) prior to molding, strip after flattening, cutting edge, the plane side, surface cleaning and transportation to the curved side handle. 
 (4) the use of electrical contacts on both sides of pressure control conveyor cylinder pressure to ensure a smooth transfer strip. 
 (5) the use of external control or internal control roll forming. 
 (6) the use of weld gap control device to ensure the weld gap to meet the welding requirements, diameter, volume, and the wrong side of the weld gap have been strictly controlled. 
 (7), welding and soldering are used outside the United States Lincoln welding machine for single or twin-wire submerged arc welding wire, welding specifications to obtain stable. 
 (8) After welding the weld were injured after a line continuous ultrasonic instrument automatically checks to ensure 100% coverage spiral weld non-destructive testing. If defective, automatic alarm and spray markers, production workers and so adjust the process parameters at any time, in a timely manner to eliminate defects. 
 (9) the use of air plasma cutting machine will cut a single pipe. 
 (10) cut into a single pipe, the pipe should be carried out strictly in each batch of the first inspection system to check the weld mechanical properties, chemical composition, fusion status, quality, and through the steel surface NDT inspection, to ensure that qualified pipe technology only after put into production. 
 (11) weld marks on the site of a continuous wave detection through manual ultrasonic and X-ray inspection, if there are defects, after repaired again after a non-destructive testing, until the confirmation defect has been eliminated. 
 (12) and with the spiral strip butt weld seam intersection where the small-joint pipe, all through the television or film X-ray examination. 
 (13) Each pipe after hydrostatic test pressure radial seal. Test tube by the pressure and time pressure detection device strict control computer. Test parameters automatically print records. 
 (14) pipe end machining, the vertical face, mouth and blunt edges slope accurate control. http://www.hbthgg.com Spiral Pipe Spiral Pipe Plant http://www.thgangguan.com 
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