Precision seamless pipe is a kind of high-precision steel pipe material that has been processed by cold drawing or hot rolling. Because the outer wall of precision steel pipe has no oxide layer, it can withstand high pressure without leakage, high smoothness, cold bending without deformation, diameter expansion, and flattening. There are no advantages such as vacuum, so it is mainly used for the production of pneumatic or hydraulic components, such as silica gel or oil cylinders, which can be short pipes or welded pipes. The chemical composition of precision steel pipes is carbon C, silicon silicon, manganese manganese, sulfur S, phosphorus P, Chromium Cr, compared with solid weight such as round steel, seamless steel pipes are lighter in weight when bending and torsional strengths are different. It is an economic econometric model and is widely used in manufacturing structural parts and mechanical parts.