Seamless steel pipe for machining is one of the most commonly used types of seamless steel pipe. Seamless steel pipe has hollow section and no weld from beginning to end. Compared with solid steel such as round steel, seamless steel pipe has the same bending and torsion strength and lighter weight. It is a kind of economic section steel, which is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, bicycle frame and steel scaffold used in construction.
Making ring parts with steel pipe can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing time, such as rolling bearing ring, jack sleeve, etc. Steel tubes are also indispensable materials for all kinds of conventional weapons. According to the shape of cross-sectional area, steel pipes can be divided into round pipe and special-shaped pipe. Because the area of the circle is the largest under the condition of equal perimeter,In addition, when the ring section bears internal or external radial pressure, the force is more uniform, so most steel pipes are round.