Executive Standard: ASTM.DIN,JIS,GB
|PRODUCT||OUT SIDE DIAMETER||THICKNESS|
|Black Rectangle Steel Pipe||0.3149X0.6299-1.9685X3.1496||11.8-80||0.0118-0.0787|
20Cr steel pipe manufacturers production methods
20Cr steel pipe has a hollow section and is used as a conduit for conveying fluids, such as oil, natural gas, gas, water and some solid materials.
Compared with solid steel such as round steel, the weight is lighter when the bending and torsional strength is the same. 20Cr seamless steel pipe is an economical section steel, which is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes and automobile transmissions. Shafts, bicycle frames, and steel scaffolding used in construction.
The use of 20Cr steel pipe to manufacture ring parts can improve the material utilization rate, simplify the manufacturing process, save materials and processing man-hours, such as rolling bearing rings, jack sets, etc. Currently, 20cr steel pipe manufacturers have widely used steel pipes for manufacturing.
20Cr seamless steel pipe is also an indispensable material for various conventional weapons, and barrels, barrels, etc. are all made of steel pipes.
20cr steel pipe manufacturers can be divided into round pipes and shaped pipes according to the shape of the cross-sectional area. Since the area of the circle is the largest under the condition of equal circumference, more fluid can be transported by the circular tube. In addition, the circular section is subjected to a relatively uniform force when subjected to internal or external radial pressure, and therefore, most of the steel pipes are circular pipes.
Steel pipes are not only used to transport fluids and powdered solids, exchange heat, make mechanical parts and containers, but are also an economical steel.
The use of steel pipes to manufacture building structure grids, pillars and mechanical supports can reduce weight and save 20-40% of metal, and can realize mechanized construction. The use of steel pipes to manufacture highway bridges not only saves steel and simplifies construction, but also greatly reduces the area of the protective coating and saves investment and maintenance costs.
20cr steel pipe manufacturers can be divided into two categories according to the production method: seamless steel pipe and seamed steel pipe, and the seam steel pipe is referred to as straight seam steel pipe.
1.20cr steel pipe manufacturers can be divided into: hot-rolled seamless pipe, cold drawn pipe, precision steel pipe, hot expansion pipe, cold spinning pipe and extruded pipe according to the production method.
The seamless steel pipe is made of high-quality carbon steel or alloy steel, and has hot rolling and cold rolling (drawing) points.
2.Welded steel pipes are divided into furnace welded pipes, electric welding (resistance welded) pipes and automatic arc welded pipes due to different welding processes. Due to the different welding forms, they are divided into straight welded pipes and spiral welded pipes, because their end shapes are divided. It is a round welded pipe and a special-shaped (square, flat, etc.) welded pipe.
The welded steel pipe is formed by welding a steel plate rolled into a tubular shape by a seam or a spiral seam. In terms of the manufacturing method, it is further divided into a welded steel pipe for low-pressure fluid transportation, a spiral-welded electric steel pipe, a direct-wound welded steel pipe, an electric welded pipe, and the like.
Seamless steel pipes can be used in liquid pressure pipes and gas pipes in various industries. Welded pipes can be used for water pipes, gas pipes, heating pipes, electrical pipes, etc.
20# seamless steel pipe factory fixed length processing
20# Seamless steel pipe is a long strip of steel with a hollow section and no joints around it. Steel pipes have a hollow section and are used in large quantities as pipes for transporting fluids, such as pipes for transporting oil, natural gas, gas, water and certain solid materials.
Compared with solid steel such as round steel, the steel pipe is lighter in weight when it has the same bending and torsional strength. It is an economical section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, bicycles. Shelf and steel scaffolding used in construction.
The use of steel pipes to manufacture ring-shaped parts can improve the material utilization rate, simplify the manufacturing process, save materials and processing man-hours, such as rolling bearing rings, jack sleeves, etc., and have been widely used in steel pipes. Steel pipes are also indispensable materials for various conventional weapons, and barrels, barrels, etc. are all made of steel pipes.
Steel pipes can be divided into round pipes and shaped pipes according to the shape of the cross-sectional area. Since the area of the circle is the largest under the condition of equal circumference, more fluid can be transported by the circular tube. In addition, the circular section is subjected to a relatively uniform force when subjected to internal or external radial pressure, and therefore, most of the steel pipes are round pipes.
However, the round pipe also has certain limitations. For example, under the condition of being bent by the plane, the round pipe is not as strong as the square and rectangular pipe, and some agricultural machinery skeletons, steel wood furniture, etc. are commonly used for square and rectangular pipes. Shaped steel pipes of other cross-section shapes are also required depending on the application.
1. The world's production of steel pipes totals more than 5,100 production of 20# seamless steel pipe plants under more than 1,850 companies in more than 110 countries, of which more than 260 are produced by more than 170 companies in 44 countries. plant.
The national apparent consumption of 20# seamless steel pipe plant is 4.18 million tons, of which 3.821 million tons is domestic supply, accounting for 91.4% of total domestic demand. Imports were 359,000 tons, accounting for 8.59% of total domestic demand. In the same year, the consumption of oil pipes was about 910,000 tons.
Imports are about 252,000 tons. Imported pipes account for about 70% of total domestic consumption, of which import pipes account for 27.69% of total domestic consumption, and oil pipe imports account for about 70% of total imports of seamless steel pipes. Oil pipes imported from Japan account for more than half of the total imports.
China's largest oil casing production base - Tianjin Steel Pipe Co., Ltd. in 2000, the steel pipe products out of 522,000 tons, of which the production of oil casing is 364,100 tons. Casings account for more than half of the country's oil production. It ranks first in the Chinese casing market in both production and sales.
2. From the perspective of the international and domestic markets, the existing production capacity of the 20# seamless steel pipe plant has exceeded the demand.
Therefore, the future focus should be on giving full play to the capabilities of existing units and developing products such as high-strength grades, high-resistance, high-corrosion-resistant oil pipes, high-pressure boiler tubes and gas cylinders. It is also the content of the country to optimize the product structure for the current steel market in China.
This is also the key to increasing the competitiveness of domestic and foreign products and expanding market share. That is to say, improving the market competitiveness of domestic steel pipe enterprises is the key to the long-term mission and successful development of domestic enterprises after the WTO.