Q235 Q345 Thin Wall Welded Steel Pipe 2mm 12m For Construction Industry

General welded pipe: General welded pipe is used to transport low-pressure fluid. Made of Q195A, Q215A, Q235A steel. It can also be made of other mild steel that is easy to weld. Steel pipes are subjected to water pressure, bending, flattening and other experiments, and have certain requirements for surface quality. Usually the delivery length is 4-10m, and fixed-length (or double-length) delivery is often required. The specifications of welded pipes are expressed by nominal diameter (mm or inches). The nominal diameter is different from the actual. Welded pipes are divided into ordinary steel pipes and thickened steel pipes according to the specified wall thickness. The steel pipes are divided into two types according to the pipe end form with thread and without thread.

Welded thin-walled pipe: mainly used to make furniture, toys, lamps, etc. In recent years, thin-walled tubes made of stainless steel belts are widely used, such as high-end furniture, decorations, and fences.Spiral welded pipe: It is made by rolling low-carbon carbon structural steel or low-alloy structural steel strip into a tube blank at a certain spiral angle (called forming angle), and then welding the tube seam together. It can be made with a narrower Strip steel produces large diameter steel pipes. Spiral welded pipes are mainly used for oil and natural gas pipelines, and their specifications are expressed by outer diameter * wall thickness. Spiral welded pipes can be welded on one side and on both sides. The welded pipe shall be guaranteed to meet the requirements in terms of hydraulic test, tensile strength and cold bending performance of the weld.