Submerged Arc-welded spiral Steel Pipe the outside diameter(OD): from 219mm to 2432mm with all thickness: from 5mm to 32mm Outside Diameter:from 8" to 96" Wall:from Thickness from 5 mm to 32mm Standard :GB/T 9711-1997 \ SY/T 5037-2000\ API 5L PSL 1 Material(Steel grade) : Q235, Q345, 10#, 20#, 16mn, L245, L290, L360,X42-X70 Type of? steel pipe: spiral steel pipe \ERW steel pipe