1)Suitable for conveyance of gas, petroleum, fluid, and electricity 1) Outside diameter: 20 - 1,067mm 2) Thickness: 1 - 80mm A: Pipe and ... tube Size Range:1) Round pipe diameter: 8mm-3000mm ... black, blank, bright and galvanized, or paintedC: Length of each pipe: 500mm-16,000mmD: Steel grade: 10#, 20#, A106B, ...