TP321 stainless steel pipe is a pipe widely used in petroleum, chemical, food, medicine, aerospace, and other fields. It is favored for its good corrosion resistance, high temperature performance, and mechanical properties.

①TP321 stainless steel pipe chemical composition: carbon (C): ≤0.08, silicon (Si): ≤1.00, manganese (Mn): ≤2.00, sulfur (S): ≤0.030, phosphorus (P): ≤0.035, chromium (Cr): 17.00～19.00, nickel (Ni): 9.00～12.00, titanium (Ti): =5x(c%-0.02)~0.8 Mechanical properties: tensile strength σb (MPa): ≥520, yield strength σ0.2 (MPa): ≥205, elongation δ5 (%): ≥40, section shrinkage ψ (%): ≥50, hardness: ≤187HB; ≤90HRB; ≤200HV.
②TP321 stainless steel pipe product implementation standards: ASME SA-213/SA-213M ferrite and austenite seamless steel pipes for boilers, superheaters, and heat exchangers. ASME SA-312/SA-312M seamless, welded, and deep cold processed austenitic stainless steel pipes, GB/T14976 seamless stainless steel pipes for fluid transportation, GB/T13296 seamless stainless steel pipes for boilers and heat exchangers. TP321 stainless steel pipes are used to manufacture pipelines, valves, petrochemical equipment, etc. during the extraction, transportation, and storage of oil and natural gas.

First, the characteristics of TP321 stainless steel pipes
The main characteristics of TP321 stainless steel pipes are as follows:
1. Excellent corrosion resistance: TP321 stainless steel pipes have a long service life in a variety of corrosive media such as acids, alkalis, salts, etc., which can effectively prevent medium leakage and pollution.
2. Stable high temperature performance: TP321 stainless steel pipes are not easy to deform, oxidize, or produce harmful substances at high temperatures, and can meet the requirements of high temperature working conditions.
3. Good mechanical properties: TP321 stainless steel pipe has high strength and toughness, and can withstand greater pressure and impact.
4. Environmental protection and safety: TP321 stainless steel pipe is non-toxic and odorless, environmentally friendly, does not produce harmful substances, and is safe and reliable to use.
5. Long life: TP321 stainless steel pipe has a long service life and low maintenance cost, which can save a lot of repair and replacement costs for enterprises.

Second, the production process of TP321 stainless steel pipe
The production process of TP321 stainless steel pipe mainly includes the following steps:
1. Smelting: Use high-purity raw materials for smelting to ensure that the impurities and gas content in the molten steel meet the standard requirements.
2. Continuous casting: Qualified molten steel is continuously injected into the continuous casting crystallizer to form a tube billet.
3. Rolling: The tube billet is rolled multiple times to make it a pipe of the required specifications.
4. Heat treatment: The pipe is subjected to high-temperature tempering treatment to eliminate internal stress and improve corrosion resistance.
5. Surface treatment: Polish, pickle or coat the inner and outer surfaces of the pipe to meet the requirements of different uses.
6. Inspection and packaging: Strict quality inspection of finished pipes to ensure qualified product quality. Finally, packaging is carried out for transportation and storage.

Third, the use of TP321 stainless steel pipes
TP321 stainless steel pipes have a wide range of uses, mainly including the following aspects:
1. Petrochemical industry: TP321 stainless steel pipes are widely used in petroleum and chemical pipeline systems, such as acid gas pipelines, brine pipelines, etc. Due to its excellent corrosion resistance, it can effectively prevent medium leakage and pollution.
2. Food industry: TP321 stainless steel pipes meet food safety standards and can be used in food processing, beverage production, and other fields. Its advantages of cleanliness, hygiene, non-toxicity, and tastelessness can ensure the quality and safety of food.
3. Aerospace field: TP321 stainless steel pipes have the characteristics of stable high temperature performance and good mechanical properties, and are suitable for liquid transportation pipeline systems in aerospace vehicles. It can work normally under extreme temperature and pressure conditions to ensure the safe operation of aircraft.
4. Pharmaceutical industry: In the pharmaceutical industry, high-quality pipeline materials are required for the manufacture and transportation of drugs. TP321 stainless steel pipes have excellent corrosion resistance and hygienic properties, which can meet the high requirements of the pharmaceutical industry for pipeline materials. It can ensure the purity and safety of drugs and avoid contamination of drugs by pipelines.
5. Nuclear industry: In nuclear power plants, the safety and reliability of pipeline systems are crucial. TP321 stainless steel pipes have excellent corrosion resistance and high temperature performance and can work normally under nuclear radiation and high temperature and high-pressure conditions to ensure the safe operation of nuclear power plants.
6. Other fields: In addition to the above fields, TP321 stainless steel pipes are also widely used in shipbuilding, environmental protection engineering, new energy, and other fields. For example, the condenser pipes on ships can be made of TP321 stainless steel pipes to improve the performance and service life of the ship. In environmental protection engineering, TP321 stainless steel pipes can be used to manufacture flue gas desulfurization and denitrification pipeline systems to reduce pollutant emissions. In the field of new energy, TP321 stainless steel pipes can be used to manufacture heat transfer pipelines for solar thermal power generation systems and wind power generation systems.

Fourth, Summary
TP321 stainless steel pipe, as a high-performance pipe, has broad application prospects and market potential. Its excellent corrosion resistance, high-temperature performance, and mechanical properties can meet the needs of different fields, saving a lot of maintenance and replacement costs for enterprises. With the continuous advancement of technology and the expansion of application fields, TP321 stainless steel pipe will be applied and developed in more fields.