Galvanized steel pipe 1) Outer diameter: 20mm-273.1mm 2) Thickness: 0 ... pipe: Q195, Q215, Q235, Q345, X52, X602) Standards: Q195/235,SS400,ST37,A36/53/106,API 5L/5CT3) Outside diameter ... : 20mm to 273.1mm4) Wallthickness: 0.8mm to 12mm5) Length of each pipe: 5.8m ... .8m or 12m6)Scaffolding pipe, Structure pipe, Fence/Door pipe, Furniture, Low pressure fluid pipe for water oil or gas ...