Alloy tube is divided into seamless tube structure and high pressure heat resistant alloy tube. It is mainly different from the production standard of alloy tube and its industry. The alloy tube is annealed and conditioned to change its mechanical properties. To achieve the required processing conditions. Its performance is higher than the general seamless steel pipe variable utilization value, alloy tube chemical composition contains more Cr, high temperature resistance, low temperature resistance, corrosion resistance. General carbon seamless tube does not contain alloy composition or alloy composition is very little, alloy tube in petroleum, aerospace, chemical, electric power, boiler, military and other industries used more widely because the mechanical properties of the alloy tube change better adjustment.Alloy steel pipe is mainly used for power plants, nuclear power, high pressure boilers, high temperature superheater and reheater and other high pressure and high temperature pipes and equipment, it is made of high quality carbon steel, alloy structural steel and stainless heat resistant steel material, by hot rolling (extrusion, expansion) or cold rolling (drawing).It can be 100% recycled, which conforms to the national strategy of environmental protection, energy saving and resource saving. The national policy encourages the expansion of the application field of high-pressure alloy tube. The proportion of total steel consumption of alloy tube in our country is only half of that in developed countries. The expansion of the application field of alloy tube provides a broader space for the development of the industry. According to the research of expert group of Alloy Pipe Branch of China Special Steel Association, the average annual growth of the demand for high pressure alloy pipe length can reach 10-12% in the future.The Connection and Difference With Seamless PipeAlloy pipe is steel pipe in accordance with the production material (that is, material) to define, as the name suggests is made of alloy pipe; And seamless pipe is steel pipe in accordance with the production process (seamless) to define, different from seamless pipe is welded pipe, including straight seam welded pipe and spiral welded pipe.Alloy tube has hollow section, widely used for conveying fluid pipeline, such as conveying oil, natural gas, gas, water, mechanical processing, and some solid materials of the pipeline. Compared with solid steel such as round steel, alloy steel pipe has the same bending and torsional strength and is lighter in weight. Alloy steel pipe is a kind of economic section steel, widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipe, automobile transmission shaft, bicycle frame and steel scaffolding used in construction. Alloy steel pipe manufacturing ring parts, can improve the utilization rate of materials, simplify the manufacturing process, save materials and processing hours, such as rolling bearing ring, jack sleeve, etc., has been widely used to manufacture steel pipe. Alloy steel pipe or a variety of conventional weapons indispensable material, barrel, barrel, etc. to steel pipe to manufacture. Alloy steel tubes can be divided into round tubes and special-shaped tubes according to the different shapes of the cross-sectional area. Since the circle has the largest area when the circumference is equal, more fluid can be transported with a circular tube. In addition, the annular section under internal or external radial pressure, the force is more uniform, so the vast majority of steel pipe is round.Alloy pipe has large diameter alloy pipe, thick wall alloy pipe, high pressure alloy pipe, alloy flange, alloy elbow, P91 alloy pipe and seamless steel pipe, in addition to chemical fertilizer special pipe is also very common.