Wound Fin Tube ASTM A249 TP321 For Air Cooler , Heat Exchager , Condenser
TP321 is a titanium-stabilized austenitic stainless steel that offers excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 427°C to 816°C (800°F to 1500°F). This alloy is particularly suitable for high-temperature applications and environments where oxidation and corrosion resistance are crucial.
When used in ASTM A249 TP321 Wound Fin Tubes, it becomes highly effective in heat exchanger applications, providing robust performance and efficient heat transfer. These fin tubes are widely used in power generation, industrial boilers, chemical processing, and aerospace industries, providing reliable and durable performance in demanding environments.
Type | Description | Base tube | Fin specification (mm) | ||
O.D. (mm) | Fin pitch | Fin height | Fin thick | ||
Wound | L / KL / LL Type Fin Tube | 16-63 | 2.1-5 | <17 | ~0.4 |
Chemical Composition:
Grade | C | Mn | Si | P | S | Cr | Ni | Ti |
TP321 | ≤ 0.08% | ≤ 2.00% | ≤ 0.75% | ≤ 0.045% | ≤ 0.030% | 17.0–19.0% | 9.0–12.0% | 5x(C + N) minimum, 0.70% maximum |
Mechanical Properties:
Tensile Strength | 515 MPa (75,000 psi) minimum |
Yield Strength | 205 MPa (30,000 psi) minimum |
Elongation | 40% minimum in 50 mm |
Hardness | ≤ 95 HRB (Rockwell Hardness B) |
Key Features:
Enhanced Heat Transfer: The fins significantly increase the surface area, thereby enhancing the heat transfer rate.
Corrosion Resistance: TP321 provides excellent resistance to oxidation and intergranular corrosion, making it suitable for high-temperature applications.
Mechanical Bonding: The wound fin design ensures a secure mechanical bond between the fins and the base tube, ensuring efficient heat transfer and durability.
High Thermal Conductivity: Fins (often aluminum) ensure high thermal conductivity, improving overall heat exchanger efficiency.
Durable Base: The TP321 base tube provides high durability and resistance to mechanical stress under high temperatures.
Applications:
1. Heat Exchangers
2. Boilers and Superheaters
3. Chemical Processing
4. Aerospace and Defense