steel scaffolding pipe for construction 1.O.D.:20 - 720 mm 2.Thickness:1.3-12.75 mm 3.Technique:ERW 4.Length:1-12m erw scaffolding steel pipes/tubes Standard:GB/T8162-1999,GB/T8163-1999,GB/T3091-2001,BS1387,ASTM A106-2006,ASTM A53-2007Productive Capacity: 1500t per month Product Name:Galvanized Steel Pipe/Galvanized Pipe / Steel Galvanized pipe /Galvanized Tube/Steel Pipes/Size:OD1/2~10'' ...