... .8 - 22 mm 3.Length:1-24m Product nameCHS ERW Mild Steel Pipes Out Diameter21.3mm-610mm, 1/2”-24”Wall Thickness1 ... , J55, K55, M65, L80, C95, N80,Q125, S235GT, S195T, Grade 1, Grade 2, Grade 3, ST33-2, St33, St37, St42, St34-2, St37 ... -in-place concrete piles - for welded, riveted,or bolted construction of bridges and buildings, and for generalstructural purposes- suitable for nominal ...