TP321 Stainless Steel Pipe
Products Description
TP321 stainless steel pipe is a high-performance austenitic stainless steel product widely utilized in demanding industrial applications. Its defining characteristic is the addition of titanium, which provides superior resistance to intergranular corrosion, particularly after exposure to high temperatures. This makes it a preferred material for environments involving elevated temperatures and corrosive media
Product | TP321 Stainless Steel Pipe |
Standard | ASTM A312. ASTM A213 |
Grade | TP321, UNS S32100, AISI 321 |
Sizes Range | OD:21.3mm-762mm, Thickness 2.0mm-100mm |
Delivery condition | Heat treated.Solution annealed and pickling |
Applications | Chemical industries , Boilers, Heat Exchanger |
Chemical composition
TP321
C | Mn | Si | P | S | Cr | Ni | Ti |
≤ 0.08% | ≤ 2.00% | ≤ 1.00% | ≤ 0.045% | ≤ 0.030%, | 17.00~19.00% | 9.00~12.00% | ≥ 5×C% and Max to 0.70% |
Features and Advantages
Excellent High-Temperature Properties: TP321 exhibits outstanding resistance to oxidation and creep at high temperatures, maintaining structural integrity and strength under thermal stress. It demonstrates excellent high-temperature stress fracture performance and creep resistance.
Enhanced Corrosion Resistance: The titanium stabilization effectively prevents chromium carbide precipitation at grain boundaries during welding or high-temperature service (450-850°C), thereby mitigating intergranular corrosion. It offers good general corrosion resistance in various atmospheres and against many corrosive substances.
Superior Mechanical Strength: This grade possesses excellent strength and durability, making it suitable for high-pressure and high-strength mechanical structures.
Seamless Construction: Manufactured as a seamless pipe, it eliminates the weak points and potential failure zones associated with welded seams, thereby enhancing overall reliability and pressure containment capability.
Smooth Fluid Flow: The seamless manufacturing process and surface treatment result in a smooth interior surface, which minimizes friction, reduces pressure drop, and prevents scaling or buildup in fluid transport applications.
Technical Specifications
Standard Grades: Commonly conforms to ASTM A312 TP321, UNS S32100, and is equivalent to AISI 321.
Material Composition: It is a Ni-Cr-Ti austenitic stainless steel. The titanium content is typically not less than five times the carbon content, which is the key to its stabilization.
Manufacturing Technique: Primarily produced through cold rolling or cold drawing processes, ensuring precise dimensional tolerances and superior surface finish.
Surface Treatment: Typically supplied with a pickled surface finish to remove scale and enhance corrosion resistance.
Applications
Petrochemical & Chemical Processing: Ideal for heat exchangers, furnace tubes, piping systems for high-temperature gases and fluids, and components in hydrogen production systems.
Power Generation: Suitable for high-pressure steam boiler pipelines, superheater tubes, and other high-temperature pressure parts.
Automotive & Aerospace: Used in exhaust systems, manifolds, and other high-temperature engine components.
General High-Temperature Service: Employed in the manufacturing of heat-treatment equipment, radiant tubes, and other industrial heating apparatus.
quality control
* Hydrostatic Pressure Testing
* Non-Destructive Testing (Eddy Current, Ultrasonic)
* Intergranular Corrosion Test
* Chemical composition test
* Mechanical Property Test
* Dimension & Surface Inspection
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