It is mainly used for high-pressure and high-temperature pipelines and equipment in power plants, nuclear power plants, high-pressure boilers, high-temperature superheaters and reheaters. It is made of high-quality carbon steel, alloy structural steel and stainless heat-resistant steel. It is made by hot rolling (extrusion, expansion) or cold rolling (drawing). The biggest advantage of alloy steel pipe
It can be recycled, which is in line with the national strategy of environmental protection, energy saving and resource conservation. National policies encourage the expansion of the application fields of high-pressure alloy pipes. At present, my country's alloy pipe consumption accounts for only half of the total steel consumption in developed countries. The expansion of the use of alloy pipes provides broader space for industry development. According to research by the expert group of the Alloy Pipe Branch of the China Special Steel Association, the demand for high-pressure alloy pipe long products in my country will grow at an average annual rate in the future.
Alloy Pipe Standards
Alloy pipes have hollow sections and are widely used as pipelines for transporting fluids, such as pipelines for transporting oil, natural gas, coal gas, water and certain solid materials. Compared with solid steel materials such as round steel, alloy steel pipes are lighter in weight when the bending and torsional strength is the same. Alloy steel pipes are an economical cross-section steel and are widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes and automobile transmissions. Axles, bicycle racks and steel scaffolding used in building construction, etc. Using alloy steel pipes to manufacture ring-shaped parts can improve material utilization, simplify the manufacturing process, and save materials and processing time, such as rolling bearing rings, jack sets, etc., which are now widely manufactured with steel pipes. Alloy steel pipes are also an indispensable material for various conventional weapons. Gun barrels, barrels, etc. are all made of steel pipes. Alloy steel pipes can be divided into round pipes and special-shaped pipes according to different cross-sectional area shapes. Since the circle area is the largest when the circumferences are equal, more fluid can be transported with circular tubes. In addition, the circular cross section is relatively uniformly stressed when subjected to internal or external radial pressure. Therefore, the vast majority of steel pipes are round pipes.
Alloy Steel Pipe Dimensional Tolerance
> Steel Pipe Type
Outer Diameter
Wall Thickness
Cold drawn pipe
Steel pipe outer diameter
Allowable deviation
Steel pipe wall thickness
Allowable deviation
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>The meaning of each element and symbol in alloy steel
The steel grade is referred to as the steel grade. It is the name given to each specific steel product and is a common language for people to understand steel. my country's Ganghao representation method generally uses a combination of Chinese pinyin letters, chemical element symbols and Arabic numerals
Alloy steel pipes are supplied by manufacturers and are mainly used in high-pressure boilers for nuclear power plants.