Spiral welded pipe production process is in accordance with the appropriate helix angle of low-alloy structural steel and low-carbon carbon steel rolled into a tube, and then welded pipe forming.Welding is the use of proximity or flux under the burning of the arc and skin effect, heating the edge of the tube and to melt, in the appropriate extrusion under the cooling molding. It is the most significant feature of spiral steel pipe which can produce large diameter steel pipe with narrow billet.
The cleaning of the high frequency straight seam steel pipe can only be used as an auxiliary means in the anti-corrosion treatment because the cleaning method can only remove the residual organic matter such as dust, grease and lubricant on the steel surface, and can not play the anti-corrosion effect, The same can be the surface of the dirt washed, most of the bacteria still remain in the hands. Longitudinal submerged arc welded pipe and high frequency straight seam welded pipe is different from the edge of the tube melting method, the general use of arc melting is called straight seam submerged arc welded pipe, and high-frequency straight seam welded pipe is the use of high-frequency current melting.
There are four common methods of derusting, namely pickling, cleaning, spraying rust and tool derusting. . Spiral submerged arc welded pipe is the main form of spiral welded pipe. It is widely used in the construction of gas pipeline in all walks of life. can be completely removed, but the steel surface attached to the solid Scaling is powerless and can not achieve the standard anti-corrosion effect.In order to reduce the coating quality, the type of layers and the construction environment factors on the life of the longitudinal seam welded pipe life, to regularly on the straight seam welded pipe rust. Professional and technical personnel with wire brush and other cleaning tools to polish the surface of the workpiece, this method is known as the tool rust, loose rust, welding slag and oxide, etc. Spraying rust is the use of steel sand, steel balls and other high-quality abrasive through the jet of a strong centrifugal force to the straight seam steel pipe surface spray, not only can effectively remove the surface of the dirt, rust and oxide, roughness should be abrasive And the straight seam welded pipe under the friction to achieve the standard level. Pickling is one of the most commonly used methods of derusting, not only as a sandblasting and dehumidification after the re-treatment process, but also the surface of the long-welded pipe rust, oxide, dilapidated coating completely removed, although this cleaning method Can make the steel surface roughness and cleanliness have reached the standard requirements, but after all, is Refrigerant Dosing Meter hanging hook the chemical cleaning method, the surrounding environment is likely to cause pollution