spiral steel pipe for piling 1)OD:219.1-4064mm 2)WT:3.2~30mm 3)Usage: building construction, offshore , marine1.Commodity: spiral steel pipe for piling2.Specification: Executive Standard: ASTM A 252, ASTM A53, EN10217, SY/T5037,Sy/T 5040, IS1978,3.Material: Gr1, Gr 2, Gr3,GrA, GrB, GrC,S235JR, S235, ST37,ST52,4.Outer Diameter: 219mm-4064mm ..