Welded Steel Pipes

Generally welded pipes or steel pipes with welding seam adopt steel plate or steel strip as billets. Normally welded steel pipe may divide into two categories such as electric resistance welded steel tube (ERW) and Spiral welded steel pipe. In addition, referring to different welding methods, it can be divided into arc welded pipe, high frequency or low frequency electric resistance welded pipe, gas welded pipe, Bondi pipe, furnace welded pipe and so on. About what quality welded steel pipe is and how to choose, below is the suggest through senior insider.

What is welded steel pipe?

The carbon steel pipe that forms to round or square shape by bending steel strips and plates and through welding process, is called welded steel pipes according to its definition. So simply understanding about welded pipes is the pipe with welding process, and you may find welding seam on the surface of welded steel pipes. Certainly, the most of ERW pipes produce with coating process such as galvanized coating or galvalume coating and so on, so welding seam is not clear to show.

Advantages of welded steel pipes

  • Welded steel pipe can improve material utilization, simplify manufacturing process, and save steel and processing time. It can be processed into welding, bending and flanging.
  • Welded steel pipe has high precision, uniform wall thickness and high brightness of internal and external surfaces.
  • As the weight of welded pipe is only 1/5 of square steel, it is lighter.
  • Welded steel pipe has the characteristics of corrosion resistance, acid resistance, alkali resistance, salt and atmospheric environment corrosion resistance, impact resistance high temperature resistance.

Usage of welded steel pipe

Welded steel pipes are widely used in compressor stations, power plants, refineries, natural gas transmission and steam, steam transmission.

In addition, it is widely used in the manufacture of oil drill pipe, automobile transmission shaft, bicycle frame, steel scaffold for construction and other structural and mechanical parts.

Specification of welded steel pipes

As a senior steel pipe manufacturer in China, we may produce and supply welded steel pipes of different specifications according to the requirements of different foreign steel purchasers. We offer metric and British standards. Often, following size range is,

  • Wall thickness of pipe: 0.7 to 6.0 (mm)
  • Diameter of pipe: 4” (foot) to 8’ (inch)