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. ... Quality gradeFirst class, prime, newly produced, secondary , stock etc.Material/Steel gradeA, B, X42, X46, X52, X56, X60, X65, ... load-carrying member, or as a shell to form cast-in-place concrete piles - for welded, riveted,or ...