Extruded Finned Tube ASME SA249 TP304 with AL1060 Fins For Heat
Exchanger and Boiler
The Extruded Finned Tube ASME SA249 TP304 with AL1060 Fins is a
specialized type of heat transfer tube designed for use in heat
exchangers and boilers. It combines the corrosion resistance and
strength of stainless steel (TP304) with the excellent thermal
conductivity of aluminum fins (AL1060). This combination makes it
highly efficient for heat transfer applications in demanding
environments.
Here’s a detailed breakdown of its components and applications:
1. Components of the Extruded Finned Tube
- Base Tube Material: ASME SA249 TP304 Stainless Steel
TP304 is a grade of austenitic stainless steel known for its
excellent corrosion resistance, high-temperature strength, and
durability.
It is suitable for use in corrosive environments, high-temperature
applications, and processes requiring hygienic conditions (e.g.,
food and beverage, pharmaceuticals).
The base tube is manufactured according to the ASME SA249 standard,
which specifies seamless stainless steel tubes for boilers,
superheaters, and heat exchangers.
AL1060 is a commercially pure aluminum alloy (99.6% aluminum) with
excellent thermal conductivity, lightweight properties, and good
corrosion resistance.
The fins are extruded onto the base tube, creating a strong
mechanical bond between the aluminum fins and the stainless steel
tube. This ensures efficient heat transfer and durability.
The fins are formed by extruding aluminum through a die, which
creates a seamless and tightly bonded fin structure around the
stainless steel tube.
This design maximizes the surface area for heat transfer, improving
the overall efficiency of the heat exchanger or boiler.
2. Key Features
- High Thermal Efficiency: The aluminum fins significantly increase the surface area for heat
transfer, enhancing the overall efficiency of the heat exchanger or
boiler.
- Corrosion Resistance: The TP304 stainless steel base tube provides excellent resistance
to corrosion, making it suitable for harsh environments, including
those with high moisture, chemicals, or saltwater.
- Lightweight: The use of aluminum fins reduces the overall weight of the tube,
making it easier to handle and install.
- Durability: The extruded fin design ensures a strong bond between the fins and
the base tube, preventing separation or damage during operation.
- Temperature Resistance: TP304 stainless steel can withstand high temperatures, making it
suitable for boiler and heat exchanger applications.
3. Advantages of Using TP304 with AL1060 Fins
- Cost-Effective: Aluminum fins are less expensive than stainless steel fins,
reducing the overall cost of the tube while maintaining high
performance.
- Enhanced Heat Transfer: The high thermal conductivity of aluminum fins improves heat
transfer efficiency.
- Versatility: Suitable for both high-temperature and corrosive environments.
- Long Service Life: The combination of TP304 stainless steel and AL1060 aluminum
ensures durability and resistance to wear and tear.
4. Chemical Composition of ASTM A249 TP304
The chemical composition of TP304 stainless steel is defined by the
ASTM A249 standard. Here are the typical values:
| Element | Composition (%) |
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 |
| Chromium (Cr) | 18.00–20.00 |
| Nickel (Ni) | 8.00–11.00 |
| Iron (Fe) | Balance |
5. Mechanical Properties of ASTM A249 TP304
The mechanical properties of TP304 stainless steel are also
specified by the ASTM A249 standard. These properties are typically
measured at room temperature.
| Property | Value |
| Tensile Strength | ≥ 515 MPa (75,000 psi) |
| Yield Strength (0.2% Offset) | ≥ 205 MPa (30,000 psi) |
| Elongation (in 2 inches) | ≥ 35% |
| Hardness (Rockwell B) | ≤ 90 HRB |
Additional Notes
- Corrosion Resistance: TP304 stainless steel offers excellent resistance to corrosion,
making it suitable for use in harsh environments, including those
with exposure to moisture, chemicals, and high temperatures.
- High-Temperature Performance: TP304 retains its mechanical properties at elevated temperatures,
making it ideal for heat exchanger and boiler applications.
- Formability and Weldability: TP304 is highly formable and weldable, allowing for easy
fabrication into various shapes and structures.
6. The Applications of Extruded Finned Tube ASME SA249 TP304 with
AL1060 Fins:
This type of finned tube is commonly used in:
(1) Heat Exchangers:
Shell-and-tube heat exchangers
Air-cooled heat exchangers
Condensers and evaporators
(1) Boilers:
Waste heat recovery boilers
Steam boilers
Thermal oil heaters
(2) Power Plants:
Heat recovery steam generators (HRSGs)
Cooling systems
(3) Petrochemical Industry:
Heat transfer in refineries and chemical processing plants
(4) HVAC Systems:
Heating, ventilation, and air conditioning systems
(5) Marine Applications:
Heat exchangers and condensers in marine environments
(6) Food and Beverage Industry:
Pasteurization and sterilization processes
