... - 22 mm 3.Length:1-24m Product nameCHS ERW Mild Steel Pipes Out Diameter21.3mm-610mm, 1/2”-24”Wall Thickness1.8mm ... /2444, ISO3183, ISO11960, JISG3444,JISG3454 etc.Quality gradeFirst class, prime, newly produced, secondary , stock etc.Material/Steel gradeA, B, X42, X46, X52 ... a shell to form cast-in-place concrete piles - for welded, riveted,or bolted construction of bridges and buildings, and for ...