Welded steel pipe: also known as pipe, plate or strip is used after bending, and is made by welding. Longitudinal and divided according to the form of spiral weld pipe. Divided into general-use pipe, galvanized pipe, oxygen pipe, wire pipe, metric pipe, roller pipe, deep well pump tube, automotive tube, transformer tube, welding thin-walled tubes, welding shaped tube and spiral. General pipe: pipe used to transport low-pressure fluid normally. With Q195A, Q215A, Q235A steel. Welding can be applied easily to other soft steel. LSAW steel pipe is produced, and spiral welded pipe is hot rolled coil production. Hot strip rolling process unit has a range of benefits, with access to high-quality pipeline steel production capacity of metallurgical processes. For example, the output bench equipped with a water cooling system to speed up the cooling, which allows the use of low-alloy components to achieve a particular level of intensity and low temperature toughness, to improve the weldability of steel. However, this system is not in the basic steel production plant. Coil of the alloy content (carbon equivalent) is often lower than similar grades of steel, which improves the weldability of spiral welded pipe. Also be noted that, due to the rolling direction of the coil spiral welded pipe axis is not perpendicular to the direction (the folder depends on the solution steel helix angle), and straight seam steel plate rolling direction perpendicular to the pipe axis direction, and therefore, spiral welded pipe material is better than straight seam steel pipes crack. http://www.naimoguanjian.com spiral steel tubing http://www.thgangguan.com