ERW Tube Manufacturing Process

  • Published 30 August, 2022
  • Created By Meta Engitech

Electric Resistance Welded Tube Manufacturing Process

ERW Tube is manufactured by cold forming a flat steel strip into a rounded tube and passing it through a series of forming rollers to obtain a longitudinal seam. The two edges are then simultaneously heated with a High-Frequency Induction Welding unit and squeezed together to produce a bond. The longitudinal ERW seam does not require filler metal while impurities in the heat-affected zone are extruded during the welding process.

Advantages of ERW Tube:

  • There are no fusion metals used during the manufacturing process. This means that the Tube is extremely strong and durable.
  • The weld seam cannot be seen or felt. This is a major difference when looking at the double submerged arc welding process, which creates an obvious welded bead that might need to be eliminated.
  • With the advances in high-frequency electric currents for welding, the process is far easier and safer.
  • ERW Steel Tube has the least thickness deviation when compared with the seamless tube, because of the high dimensional accuracy of the steel strip.
  • ERW steel tube has high concentricity, uniform wall thickness after heat treatment, uniform microstructure & strong ability to collapse
  • The impact toughness of the ERW tube is better than that of the Seamless tube.