ERW pipe manufacturing process

ERW pipe process mianly depends on a variety of products from raw materials to finished products, which need to go through a series of processes

ERW pipes means ERW pipe manufacturing processs. A plate rolled to become a pipe and welded using Electric Resistance Welding process. Usully for for high diameter.

completion of these processes requires a variety of machinery and equipment and welding, electrical controls, detection devices, these devices and devices according to different. The process requires a variety of reasonable arrangement, the typical flow of high frequency welded pipe: open-book - strip leveler - head and tail cut - strip butt - looper accumulator - molding - welding - clear the glitch - sizing - flaw -fly cut - Initial verification - tube Straightening - pipe processing - hydrostatic testing - flaw detection - Printing and coating - finished.

High-frequency welding is continuously flowing through the workpiece contact surface of the high-frequency current generated by the resistance heating and forging force to impose, so that the workpiece metal to achieve a mutually successive welding method. It is similar to the ordinary resistance welding, but there are many important differences.

High-frequency welding for carbon steel welded pipe production has been 40 years of history. High-frequency welding power power of different material, diameter and wall thickness of steel pipe to achieve a higher welding speed (more than l0 times higher than the the TIG highest welding speed).

Therefore, production of general-purpose high-frequency welding steel pipe has a higher productivity of high-speed high-frequency welding, pipe within the burr removal difficult, and this is also the high-frequency welded steel pipe is not yet for the chemical, nuclear industry accepted one of the reasons. From the welding material, high frequency welding can weld all types of steel pipes. At the same time, the development of new steel grades and shaping the progress of welding methods.

ERW line pipe-- for the transportation of oil, natural gas and chemical materials

ERW Casing pipe--petroleum and nature air exploration

Structure and Mechanical Roundpipe and Tubing

Structure and Mechanical Square or Rectangular Pipe


Weled steel pipe specification, Standard and identification

Welded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.