Special-shaped seamless steel pipe is the general name of seamless steel pipe with other section shapes except round pipe. According to the different section shape and size of steel pipe, it can be divided into equal wall thickness special-shaped seamless steel pipe, unequal wall thickness special-shaped seamless steel pipe, variable diameter special-shaped seamless steel pipe.
Special-shaped seamless steel pipe is widely used in various structural parts, tools and mechanical parts. Compared with the round tube, the special-shaped tube generally has a larger moment of inertia and section modulus, has a larger bending and torsional compressive resistance, can greatly reduce the weight of the structure, save steel.
The development of shaped pipe is mainly the development of product varieties, including section shape, material and performance. Extrusion method, oblique die rolling method and cold drawing method are effective methods to produce special-shaped pipes, which are suitable for producing special-shaped pipes of various sections and materials. In order to produce a wide variety of shaped tubes, it is necessary to have a variety of production means. In the 1990s, on the basis of only cold drawing, our country has developed dozens of production methods such as roll drawing, extrusion, hydraulic, rotary rolling, spinning, continuous rolling, rotary forging and non-die drawing, and constantly improving and creating new equipment and technology.
Post time: Feb-07-2023