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　　Carbon steel pipe is a kind of long steel pipe. Steel pipe has hollow section, which is widely used as pipeline for conveying fluids, such as oil, natural gas, gas, water and some solid materials. Compared with solid steel such as round steel, API 5L Grade X42 Seamless Carbon Steel Pipe has the same flexural and torsional strength and lighter weight. It is an economic section steel. It is widely used in manufacturing structural and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffolding used in construction.

　　Manufacturing ring parts with carbon steel pipes can improve material utilization rate, simplify manufacturing process, save material and processing time, such as rolling bearing rings, Jack sleeves, etc. At present, carbon steel pipes have been widely used in manufacturing.

　　Carbon steel pipe is also an indispensable material for all kinds of conventional weapons. Tubes, barrels, etc. are made of steel pipe. Carbon steel pipe can be divided into circular pipe and special-shaped pipe according to the shape of cross-section area. Because the circular area is the largest under the condition of equal circumference, more fluid can be transported by the circular pipe. In addition, when the ring section is subjected to internal or external radial pressure, the force is more uniform, so the vast majority of carbon steel pipe are circular tubes.

　　Manufacturing ring parts with carbon steel pipe can improve material utilization rate, simplify manufacturing process, save material and processing time, such as rolling bearing rings, Jack sleeves, etc. At present, steel pipes have been widely used in manufacturing.

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