erw vs lsaw pipe
ERW is - high frequency resistance attachment - straight seam welded pipe;LSAV is - submerged arc welding - straight seam welded pipe;Both belong to the straight seam welded pipe, however the 2 attachment method is totally different, the utilization is totally different, thus it can't represent the straight seam welded pipe alone.SSAW- spiral attachment - pipe is a lot of common.
High frequency straight seam (ERV) per the attachment method is split into totally different induction welding and resistance welding 2 forms, supported hot rolled wide volume as staple, through the continual forming, bending, welding, heat treatment, sizing, straightening, cutting method, like weld is brief, compared with screw, high dimensional accuracy, uniform wall thickness, smart surface quality, high, etc. however the disadvantage is that solely production of tiny diameter skinny wall pipe, weld straightforward generation resistant, incomplete fusion, trench corrosion defects.At present, it's wide employed in urban gas, fossil fuel and refined oil transportation.
LSAW is created by single thick and medium plate as staple, that is formed of plate in mould or forming machine at medium pressure (coil), by double submerged arc attachment and increasing.The product specification vary is wide, the toughness, plasticity, uniformity and compactness of the attachment seam is sweet, and it's the benefits of huge pipe diameter, thick pipe wall, high resistance, temperature resistance and powerful corrosion resistance.In the construction of high strength, high toughness and top quality long-distance oil and gas pipelines, most of the steel pipes required are large-diameter thick wall straight seam submerged arcs.According to the provisions of API normal, in giant oil and gas pipeline, straight seam submerged arc is that the solely selected applicable pipe kind once it passes through class one and a couple of areas like alpine and cold zone, ocean floor and concrete densely geographic region.According to totally different molding modes, it are often divided into: UOE/JCOE/HME
Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.
No.92 JieFang East Road ,Cangzhou City, Hebei,P.R.China.
CSPG has more than eighteen years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation.
We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel spiral pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.