CHS ERW Mild Steel Pipes 1. Outer Diameter:21.3 - 610 mm 2. ... 22 mm 3.Length:1-24m Product nameCHS ERW Mild Steel Pipes Out Diameter21.3mm-610mm, 1/2”-24”Wall Thickness1. ... 2, St33, St37, St42, St34-2, St37-2, St42-2, St52-3, P195, P235, P265, S235JRH, S275J0H, S275J2H, S355J0H, S355J2H ... shell to form cast-in-place concrete piles - for welded, riveted,or bolted construction of bridges and buildings, and ...