What is ERW steel pipe?

ERW,its full name is electric resistance weld.It is a welding method in which pipe is welded without adding filler material.Electric resistance welded steel pipe is manufactured by cold-forming a sheet of steel plate into a cylindrical shape.ERW has the weld seam on the inside of the pipe.

ERW steel pipes

ERW steel pipes

To manufacture welded pipe,first,plate or coil is rolled in the circular section with the help of plate bending machine or by a roller in case of continues process. Once the circular section is rolled from the plate, then pipe is weld with the help of welding setup. Welded pipes are cheaper as compared to a seamless pipe and also weak due to the weld joint. Welded pipe can be manufactured in large size without any upper restriction. ERW pipe are formed by continues rolling method. In this method, a flat metal strip from the strip coil is feed into the series of roller assembled in line. These rollers gradually form the strip in the circular section. At the end of rolling assembly, this pipe is continuously welded by welding machine.

Specifications of ERW steel pipes:

Outside Diameter: 114.3mm-610mm

Wall Thickness: 3.5mm-25mm

Quality Standards: API 5L,ASTM A53,DIN 2458,EN 10217,GB/T3091,GB/T9711,etc.

Lengh: 3m-20m

Grades: S185,S235,S275JR,S355J2H,GRB,X42-X70,L175-L555,Q235,Q345,etc.

Package: bags,bundles,losses containers or client option.

Hebei Haihao High Pressure Flange & Pipe Fitting Group has various kinds of ERW steel pipes available to meet your specific demands.With our extensive industry knowledge and access to worldwide resources,we are committed to providing you with superior products.Email:sales@haihaogroup.com