ERW Steel Pipe (Electric Resistance Welding)

Our high frequency straight seam electric resistance welded steel pipe, referred to as ERW steel pipe, is produced in strict accordance with international standards, such as API 5L, ASTM A53, etc. It is available in a large selection of dimensions and wall thickness options.

Production Process
The hot rolled coil is formed into a cylindrical shape via the forming machine. Then, the edge of the tube billet is heated and melted by exploiting the skin effect and proximity effect of high frequency current. After that, the ERW steel pipe is obtained by means of pressure welding under the action of the squeezer roller.

Our welded pipe production line can manufacture not only the ERW steel pipe, but also other products like square tube, rectangular tube, steel sheet pile, etc. It is equipped with lots of sophisticated equipment, such as solid-state high frequency welding machine, intermediate frequency heat treatment machine, dual channel ultrasonic flaw detector, hydrostatic testing machine, shearing and butt welding machine, super spiral accumulator and microcomputer control flying saw, to fulfill high production automation degree as well as stable and reliable process control.

Application
The ERW steel pipe is primarily applied in the water supply engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation and urban construction.
1. For liquid delivery: water supply and drainage
2. For gas delivery: convey coal gas, vapor and liquefied petroleum gas
3. For structural use: pile tube, bridge, wharf, road, building, etc.