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Difference between ERW steel pipe and SAW steel pipe

2014-02-26 14:19:22   COMMENT:0 HITS:
ERW Longitudinal shape can be round - Longitudinal tube, it can be square - Rectangular shaped tube or the - shaped steel tubing, it depends on the sizing rolling after welding. 
ERW straight seam high frequency welded steel pipe is used for: it has a relatively simple process, the characteristics of rapid continuous production, in civil construction, petrochemical, light industry and other sectors is widely used. Used for conveying low-pressure fluid or made into a variety of engineering components and light industrial products. 
ERW pipe is "high-frequency resistance welded steel pipe," and not the same as an ordinary pipe welding, weld steel body is made of base metal melting, good mechanical strength than pipe. 
ERW said resistance welding, resistance welding
with high efficiency, low cost, material saving, easy automation features, it is widely used in aviation, aerospace, energy, electronics, automobile, light industry and other industrial sectors, is an important process of welding one. 
SAW steel pipes and its standard categories: pressure fluid transport spiral submerged arc welded pipe (SY5036-83) is mainly used for transporting oil, natural gas pipelines; pressure fluid transmission high-frequency welded spiral seam steel pipe (SY5038-83), lap welding method with high-frequency welding, pressure fluid delivery for high-frequency welded spiral seam steel pipe. Steel pressure ability, good plasticity, easy welding and forming process; generally low pressure liquid delivery spiral submerged arc welded pipe (SY5037-83), using double-sided automatic submerged arc welding or welding into the legal system for water, gas, air and steam is generally low pressure liquid delivery such as submerged arc welded pipe 
SAW SAW steel pipe is short. It is a manufacturing process using submerged arc welding of steel, the process generates very high current density, flux layer to prevent the rapid dissipation of heat, and concentrated in the welding area. Submerged arc weld of high quality, high efficiency, very little dust-free arc and the characteristics of submerged arc welded pipe used in pressure vessels, pipe manufacture, beams, low-pressure fluid, steel works.

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