SSAW steel pipe also has its own shortcomings. The hollow section of spiral steel is used for transportation of a large number of pipeline fluids, such as oil, natural gas, natural gas, water and some solid materials, pipelines, etc. Compared with other steels and solid steel bars, the same torsional strength is lighter when bending. It is an economical cross-section steel, widely used in the manufacture of structural and mechanical parts, such as drill pipes, automobile transmission shafts, bicycle frames and buildings using steel scaffolding.


Steel pipe manufacturing ring parts can improve material utilization, simplify manufacturing process, save material and processing time, such as bearing rings, Jack sleeves, has been widely used in the manufacture of steel. Steel or all kinds of materials necessary for conventional weapons, barrels and barrels will have to be made of steel. Pipes with different cross-section shapes can be divided into pipes and special-shaped pipes. Because around the same conditions, the largest area of a circle with a circular tube can carry more fluid. In addition, the circular section bears the internal and external radial pressure, and the force is uniform, so most of the pipelines are pipelines.


However, pipes have certain limitations, such as square pipes, rectangular pipes with high bending strength under plane bending conditions, the skeleton of some agricultural machinery, square pipes popular in steel and wood furniture, rectangular pipes. The cross section shape of other special-shaped tubes should also be provided for different purposes.