CHS ERW Mild Steel Pipes 1. Outer Diameter:21.3 - ... 8 - 22 mm 3.Length:1-24m Product nameCHS ERW Mild Steel Pipes Out Diameter21.3mm-610mm, 1/2 ... DIN2440/2444, ISO3183, ISO11960, JISG3444,JISG3454 etc.Quality gradeFirst class, prime, newly produced, secondary , stock etc.Material/Steel gradeA, B ... or for screwing to BS21 pipe threads, loose steel tubes, scaffolds- used for the conveyance of fluids as well ...