LSAW Line Pipe (Longitudinal Submerged Arc Welded Pipe)

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LSAW Line Pipe (Longitudinal Submerged Arc Welded Pipe) LSAW Line Pipe (Longitudinal Submerged Arc Welded Pipe)

Single middle and thick plate is taken as the raw material of LSAW line pipe and the manufacturing process is to pressure the plate into the tube in mold or molding machine. Double-sided submerged arc welding and diameter expanding are used in this process. For finished product, it has wide range of specifications, weld toughness, ductility, good uniformity and density, large diameter, thick wall, high pressure resistance and low-temperature corrosion resistance, etc. This product is mostly used in the construction of high-strength, high toughness, high-quality long-distance oil and gas pipelines. According to API standards, this product is the only designated applicable product when large-scale oil and gas pipelines passing through Class 1 and Class 2 areas, such as high and cold region, sea bottom and densely populated area of city, etc. For specification of LSAW line pipe, outer diameter is 325--1420mm and wall thickness is 6.0 - 18mm.

There are two different types of LSAW line pipe according to different welding, UOE welded type and JCOE welded type. For UOE welded type, single steel is treated by edge prebending. After that, it is processed by many steps, including U forming, O forming, internal welding, external welding and mechanical cold expansion, etc. In terms of JCOE welded type, it is treated by processing of J-C-O-E pre-welding, forming and cold expansion after welding.

UNIGLORY is an experienced LSAW line pipe supplier in China. Our products include galvanized steel pipe, hexagon nuts, hot dipped galvanized steel coil, structural I-beam, and much more.

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