... ) Thickness: 6-20mm 4) Standards: API, GB Packing: Strong bund steel pipeA: Size Range:1) Round pipe diameter: 16mm-610mm, thickness ... each pipe: 500mm-16,000mm D: Steel grade: Q195 - Q235A, ST37-2, ST52, S235, S355, SS400, A1010, SAE1045, X40, X60 etcE: Conforms ...