(1) the raw material is steel strip coil, wire, flux. Have to pass strict physical and chemical inspection before investment.
(2) the strip head to tail docking, use DSAW steel pipe, after rolled steel tube adopts automatic submerged arc welding repair welding.
(3) before shaping, strip after flattening, cutting edge, edge planing, transmission and cleaning the surface to the flanging process.
(4) on both sides of the electric contact pressure gauge control conveyor under the pressure of oil cylinder pressure, ensure the smooth delivery of strip steel.
(5) the use of external control or internal control roll forming.
(6) the weld gap control device to ensure that meet the requirements of welding seam clearance, pipe diameter, and quantity of the wrong side of weld gap are tightly controlled.
(7) welding and welding are used within the United States Lincoln welding machine for single or double wire submerged arc welding, to obtain the stable welding specification.
More information about carbon steel pipe pls visit:Hunan Great Steel Pipe Co.,ltd
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