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ERW stands for Electric Resistance welded pipe
Source :admin   Time:8/28/2017 9:34:25 PM   hit:

  ERW steel pipe or Electric Resistance Welded steel pipe is not as strong as DOM steel pipe or Drawn Over Mandrel tubing. Usually when pipe is made, it starts off as a flat sheet and this is rolled up into a tube and welded. JIS G4312 ERW Stainless Steel Pipe is usually made the same way but there is an extra process where this pipe is drawn through a die along with a mandrel to control the outer and inner diameters of the pipe. This extra process strengthens the steel since it is cold formed by up to 20%. Another type of common piping is Chrome-Moly also known as Chromium / Molybdenum Steel. This type of steel also uses the same process but has these additional elements within the steel alloy which increase strength even more. Chrome-Moly is usually used in tubing for cars and other applications over 3500 lbs.

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