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Nickel alloy tubes are widely used in many fields in different high temperature environments by virtue of their excellent high temperature resistance, corrosion resistance and other properties, the following are some specific examples:
Petrochemical field
Atmospheric decompression distillation device: In the process of crude oil atmospheric decompression distillation, the crude oil needs to be heated to about 300 - 400 ℃. Nickel alloy tubes can be used to transport high temperature crude oil and various fractions, as they can withstand high temperature and corrosion of sulfur, salt and other components of crude oil to ensure the long-term stable operation of the device.
Catalytic Cracking Unit: Catalytic cracking reaction is usually carried out at a high temperature of 480 - 530°C. The reaction process is accompanied by complex hydrocarbon chemical reactions and the role of catalysts. Nickel alloy tubing is used to connect reactors, regenerators and to transport media such as oil and gas, and is resistant to high temperatures and pressures as well as to abrasion by catalyst particles.
Hydrogenation reactor: Hydrogenation reaction is an important process in petrochemical industry, the operating temperature is generally 300 - 450 ℃, accompanied by high pressure and hydrogen, hydrogen sulfide and other corrosive media. Nickel alloy tubes, as the import and export piping of the reactor and the internal material conveying piping, have good anti-hydrogen corrosion and anti-sulfide corrosion properties, which can ensure the safe operation under the harsh high temperature and high pressure environments.
Power industry
Thermal power boiler: In supercritical and ultra-supercritical thermal power generating units, the steam temperature of the boiler can be as high as 550 - 650 ℃, and the pressure is 25 - 35 MPa. Nickel alloy tubes are used in the manufacture of boiler superheaters, reheaters and other components, which are able to withstand high-temperature and high-pressure steam, with good anti-oxidation and creep resistance properties, to ensure efficient and stable operation of the boiler.
Nuclear power plant: In the first circuit system of pressurized water reactor nuclear power plant, the coolant temperature is about 300 - 330 ℃, and the pressure is 15 - 16 MPa. Nickel alloy tubes can be used in the main pipeline of the first circuit as well as in the heat transfer tube of the steam generator and other parts, and its excellent corrosion resistance and high temperature resistance ensure that no leakage and other safety accidents will occur due to corrosion or aging of the material in the process of long-term operation.
Aerospace field
Aero-engine: In the combustion chamber, turbine and other high-temperature parts of aero-engine, the working temperature can be as high as 1000 - 1600℃. Nickel alloy tubes are used to transport fuel, cooling air and as pipes for engine heat exchangers, etc. Their high strength, high toughness and good high temperature resistance can meet the working requirements of aero-engine under extreme conditions and ensure the reliability and performance of the engine.
Space vehicles: In the propulsion system of space vehicles, such as the fuel delivery pipes of rocket engines, they need to withstand high temperature and high pressure combustion products and high-speed flow of fuel. Nickel alloy tubes are widely used in these critical parts due to their excellent resistance to high temperature, scouring and thermal fatigue, ensuring safe and reliable operation under extreme working conditions such as space launches.
Metallurgical industry field
Heating furnace: In the metallurgical production process of iron and steel, non-ferrous metals, etc., the heating furnace needs to heat the metal materials to a high temperature to meet the requirements of rolling, forging and other processes. The temperature inside the heating furnace is usually around 800 - 1200°C. Nickel alloy tubes can be used in the radiating tubes, burners and other parts of the heating furnace, which can withstand the corrosion and thermal stress of the high temperature furnace gases, and improve the service life and productivity of the heating furnace.
Heat treatment equipment: The heat treatment process of metal materials, such as quenching, tempering, annealing, etc., needs to be carried out in a specific high-temperature environment. Nickel alloy tubes can be used as heating element support tubes and protective gas delivery tubes in heat treatment equipment, etc. They can maintain good mechanical properties and chemical stability at high temperatures to ensure precise control of the heat treatment process and product quality.