Year1
- 规格：
- DN90
- 材质：
- 20#
The product has many advantages such as high strength, high pressure resistance, easy installation, low cost, long service life, etc.
2. Detailed description
No. 1 seamless steel pipe is made of steel ingots or solid pipes The blank is perforated to make a capillary tube, and then hot rolled, cold rolled or cold drawn. Seamless steel pipe plays an important role in my country's steel pipe industry. According to incomplete statistics, my country currently has about a dozen seamless steel pipe manufacturers and several sets of seamless steel pipe units, with an annual production capacity of about 10,000 tons. Judging from the caliber, , accounts for %, and , accounts for %. In terms of varieties, general-purpose pipes accounted for 10,000 tons, accounting for % of oil pipes' 10,000 tons, .% hydraulic props and precision pipes accounted for 10,000 tons, and .% stainless steel pipes, bearing pipes, and automobile pipes totaled 10,000 tons, accounting for .%.
Seamless steel pipes are made from steel ingots or solid tube blanks that are perforated into capillary tubes, and then hot rolled, cold rolled or cold drawn. Seamless steel pipe plays an important role in my country's steel pipe industry.
The raw material for rolling seamless pipes is round tube billet. The round tube billet must be cut by a cutting machine into a billet with a length of about one meter and sent to the furnace for heating via a conveyor belt. The billet is fed into the furnace and heated to a temperature of approximately degrees Celsius. The fuel is hydrogen or acetylene. Temperature control in the furnace is a key issue. After the round tube comes out of the furnace, it must be pierced through a pressure punching machine. Generally, the more common piercing machine is the tapered roller piercing machine. This type of piercing machine has high production efficiency, good product quality, large perforation diameter expansion, and can penetrate a variety of steel types. After perforation, the round tube blank is successively cross-rolled, continuous rolled or extruded by three rollers. After extrusion, the pipe should be removed and calibrated. The sizing machine rotates a tapered drill bit at high speed into the steel billet to drill holes to form a steel pipe. The inner diameter of the steel pipe is determined by the outer diameter length of the drill bit of the sizing machine. After the steel pipe is sized, it enters the cooling tower and is cooled by spraying water. After the steel pipe is cooled, it will be straightened. After straightening, the steel pipe is sent to the metal flaw detector (or hydraulic test) by a conveyor belt for internal flaw detection. If there are cracks, bubbles and other problems inside the steel pipe, they will be detected. After quality inspection, steel pipes must undergo strict manual selection. After the quality inspection of the steel pipe, the serial number, specification, production batch number, etc. are sprayed with paint and then lifted into the warehouse by a crane.
Implementation standards for seamless steel pipes (national standards)
【】 Structural seamless pipes (/) are seamless steel pipes used for general structural mechanical structures.
【】Seamless steel pipes for fluid transportation (/) are general seamless steel pipes used to transport fluids such as water, oil, and gas. / (Seamless steel pipe for conveying fluids) is mainly used for conveying fluid pipelines in engineering and large-scale equipment. The representative materials (grades) are, etc.
【】Seamless steel pipe for low and medium pressure boilers () is a high-quality carbon structural steel used to manufacture superheated steam pipes, boiling water pipes for low and medium pressure boilers of various structures, superheated steam pipes and arch brick pipes for locomotive boilers. Hot rolled and cold drawn (rolled) seamless steel pipes. (Seamless steel pipes for low and medium pressure boilers). Mainly used in pipelines for conveying low and medium pressure fluids in industrial boilers and domestic boilers. The representative material is steel.
【】Seamless steel pipes for high-pressure boilers () are high-quality carbon steel, alloy steel and stainless heat-resistant steel seamless steel pipes used for the heating surfaces of water tube boilers with high pressures and above. (Seamless steel pipes for high-pressure boilers). It is mainly used for high temperature and high pressure resistant fluid transport headers and pipelines in power plants and nuclear power plant boilers. Represents the material as equal.
【】High-pressure seamless steel pipes for fertilizer equipment () are high-quality carbon structural steel and alloy steel seamless steel pipes suitable for chemical equipment and pipelines with working temperatures of ~°C and working pressures of ~°C. (Seamless steel pipe for high-pressure fertilizer equipment). Mainly used in fertilizer equipment to transport high temperature and high pressure fluid pipelines. The representative materials are, etc.
【】Seamless steel pipe for petroleum cracking () is a seamless steel pipe suitable for furnace tubes, heat exchangers and pipelines in petroleum refineries. (Seamless steel pipe for petroleum cracking). Mainly used in boilers, heat exchangers and pipelines for transporting fluids in petroleum refineries. Its representative materials are,
Our company mainly produces seamless steel pipes, spiral steel pipes, alloy steel pipes, anti-corrosion steel pipes, and straight seam steel pipes
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