... WELDED:TIG 4.Standard:ASTM-a554 From the nature, To the excellence. Name ASTM-A554 pipeItemsSquare tubes, round ... request Tolerancea) Outer Diameter: +/- 0.2mmb) Thickness: +/- 0.02mmc) Length: +/- 5mmSurface180G, 240G, 320G Satin / Hairline400G, 600G Mirror finishApplicationhandrail,railing, ... pipes, industrial stainless welded pipes, special-shaped pipes and etc. Main materials are:304, 201,202,316, ...