ERW Steel Pipe is made by steel belt or steel plate aftering bending shape, then through welding.
According to the weld seam ERW Steel Pipe form classified as straight and spiral welded pipe.
According to the purposes and is divided into general ERW Steel Pipe, galvanized welded pipe, oxygen blowing hanguan, wire casing, the metric welded pipe, roller tube, deep well pumps tube, automobile tube, transformer tube, electric welding tube, electric welding irregular pipe and spiral welded pipe.
General ERW Steel Pipe: general welding work to carry low pressure fluid. With Q195A, Q215A, Q235A steel manufacturing. Also can use easy to welding other mild steel manufacturing. Steel pipe must carry on the water pressure, bending, crushed and experiments, the surface quality, usually requires some delivery length is 4 to 10 m, often requirements for feet (or times feet) delivery.
The ERW Steel Pipe specifications to nominal diameter said (mm or nominal diameter and the actual inches) different, welded pipe wall thickness according to regulations have common steel and steel pipe, steel pipe thickness of the two kinds of pipe form and points according to bring threads and don’t take thread two kinds.