Seamless steel tube has a hollow section, its length is much longer than the diameter or circumference of the steel. According to the section shape is divided into round, square, rectangular and special-shaped seamless steel pipe; According to the material, it is divided into carbon structural steel seamless steel pipe, low alloy structural steel seamless steel pipe, alloy steel seamless steel pipe and composite seamless steel pipe; According to its use, it is divided into seamless steel tube for conveying pipeline, engineering structure, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling and high pressure equipment.
Seamless steel tube Seamless steel pipe is not only used to transport fluids and powdery solids, exchange heat, manufacture machine parts and containers, it is also an economic steel. The use of seamless steel pipe manufacturing building structure grid, pillar and mechanical support, can reduce the weight, save 20 ~ 40% metal, and can realize the factory mechanized construction. Using seamless steel tube to manufacture highway Bridges can not only save steel, simplify construction, but also greatly reduce the area of protective coating, saving investment and maintenance costs.
Straight welded seamless steel tube includes double – sided submerged arc welding straight welded seamless steel pipe and high frequency resistance welding. The straight welded seamless steel pipe has two kinds of ordinary seamless steel pipe and thickened seamless steel pipe according to the specified wall thickness, and the seamless steel pipe is divided into two kinds according to the form of pipe end with thread and without thread. The length of straight welded seamless steel pipe is mainly divided into fixed size and indefinite size. Large diameter straight welded seamless steel tube may need two steel plates to roll, which also forms a double weld.
Cold-rolled precision seamless steel pipe is a kind of seamless steel tube with high dimensional accuracy and good surface finish for precision mechanical structure, hydraulic equipment or steel bar sleeve. The main cold processing methods of seamless steel pipe are cold drawing and cold rolling. In recent years, with the development of science and technology, a kind of cold spinning method has been developed, which can produce large diameter and high precision cold rolled pipe and variable section cold rolled pipe. The raw material of cold working seamless steel tube can be hot rolled seamless steel pipe or welded pipe.
Post time: Feb-15-2023