CHS ERW Mild Steel Pipes 1. Outer Diameter:21.3 - 610 mm ... mm 3.Length:1-24m Product nameCHS ERW Mild Steel Pipes Out Diameter21.3mm-610mm, 1/2”-24”Wall Thickness1 ... , XS, SCH80 etc.Length1m-24mStandardAPI 5L, API 5CT, ASTM A53, ASTM A252, ASTM A500, ASTM A795, BS1387, BS1139, ... gradeFirst class, prime, newly produced, secondary , stock etc.Material/Steel gradeA, B, X42, X46, X52, X56, X60, X65, ...