Seamless steel pipe is a long strip of steel with a hollow section and no joints around it. It is widely used in pipelines for conveying fluids, such as pipelines for transporting oil, natural gas, gas, water and certain solid materials. Compared with solid steel such as round steel, seamless steel pipe has light weight and is an economical section steel with the same bending and torsional strength. It is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes and automobile transmissions. Shafts, bicycle frames and steel scaffolding used in construction.
The use of seamless steel tubes to manufacture ring-shaped parts can improve material utilization, simplify manufacturing processes, save materials and processing man-hours, such as rolling bearing rings, jack sleeves, etc., and nowadays are widely made of seamless steel pipes. Steel pipes are also indispensable materials for various conventional weapons, and barrels, barrels, etc. are all made of steel pipes. Seamless steel pipes are also indispensable materials for various conventional weapons. The barrels and barrels are made of steel pipes.
In addition, due to the difference in the shape of the cross-sectional area of the seamless steel pipe, it can be divided into: a circular pipe and a shaped pipe. Since the area of the circle is the largest under the same conditions of the circumference, more fluid can be delivered. Moreover, when the circular cross section is subjected to internal or external radial pressure, the force is relatively uniform, so most of the steel pipes are round pipes. However, the round pipe also has certain limitations. For example, under the condition of plane bending, the round pipe is not as strong as the square/rectangular pipe, and some agricultural machinery skeletons, steel wood furniture, etc. are commonly used square/rectangular pipes. In addition, special-shaped steel pipes of other cross-sectional shapes are required depending on the application.