Oil steel round pipe 1.Material Q235, Q345, Q195, Q215 2. ... 75mm 3.transporting fluids 4.Hot dipped Oil steel round pipe High strength, ornamental stainless steel tubing is a ... Q345, Q195, Q215 ,etc2..specification type Outer Diameter Thickness Round Pipe 32mm - 630mm 2.5mm-75.0mm Square Pipe 10mm ... fluids, such as the transportation of oil, natural gas, gas, water and some solid materials, pipes, etc..