CHS ERW Mild Steel Pipes 1. Outer Diameter:21.3 - 610 mm 2.Thickness:1. ... mm 3.Length:1-24m Product nameCHS ERW Mild Steel Pipes Out Diameter21.3mm-610mm, 1/2”-24”Wall Thickness1.8mm ... , beveled, cut square, grooved, threaded and coupling, etc.SurfaceBare, varnished, black lacquer, Bitumen Coating, zinc coating, anti-corrosion coating, 3PE,FBE ...