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Extruded Fin Tubes For Heat Exchanger

What are extruded fin tubes?

Extruded fin tubes are a type of heat exchanger tube that has fins formed directly on the tube surface through an extrusion process. These fins increase the surface area of the tube, allowing for enhanced heat transfer between the fluid inside the tube and the fluid outside.

How are extruded fin tubes produced?

The extrusion process involves pressing or forcing a metal or alloy through a shaped die to create the fins on the tube surface. This results in fins that are tightly bonded to the tube, providing good thermal contact and efficient heat transfer. Aluminum is commonly used for extruded fins due to its excellent thermal conductivity and corrosion resistance.

Extruded fin tubes are a popular choice for heat exchangers due to their high thermal efficiency and durability. These tubes are manufactured by extruding fins onto the outer surface of a base tube, creating a larger surface area for heat transfer. The fins can be either solid fins or serrated fins, depending on the application and desired performance.

Extruded fin tubes material:

Extruded fin tubes are available in a variety of materials, including carbon steel, stainless steel, copper, and aluminum. The choice of material depends on the specific application requirements, such as temperature, pressure, and corrosive environment. The manufacturing process allows for customization of the fin geometry and spacing, enabling engineers to design tubes that are optimized for their intended use.

Extruded fin tubes advantages:

1. Enhanced heat transfer: The fins significantly increase the surface area available for heat transfer, improving the overall heat transfer efficiency of the heat exchanger.

2. Compact design: By increasing the surface area, extruded fin tubes allow for compact heat exchanger designs, which is particularly beneficial in applications with space constraints.

3. Improved heat transfer coefficient: The design of extruded fins promotes better fluid mixing and turbulence, leading to a higher heat transfer coefficient and improved heat exchange performance.

4. Resistance to fouling: The extruded fins create turbulence and disrupt the boundary layer, reducing the likelihood of fouling by preventing the accumulation of debris or deposits on the tube surface.

5. Extruded fin tubes are their resistance to corrosion and erosion. The fins protect the base tube from exposure to corrosive materials, prolonging the life of the tube and reducing maintenance costs. Additionally, the fins can help to reduce fouling by preventing the buildup of deposits on the tube surface.

6. Extruded fin tubes are their ability to withstand high temperatures and pressure. They are commonly used in applications such as power generation, petrochemical processing, and air conditioning systems. The fins provide increased heat transfer surface area, which allows for more efficient heat transfer and reduced energy consumption.

Extruded fin tubes applications:

Extruded fin tubes find wide applications in various industries, including power generation, HVAC (heating, ventilation, and air conditioning), refrigeration, and process industries such as oil and gas, petrochemical, and chemical processing. They are commonly used in air-cooled heat exchangers, where the fins facilitate efficient heat transfer between the hot process fluid and the surrounding air.

Extruded fin tubes typical size

ASME SA179 Extruded Finned Tubes

Base Tube Material

Fin Material

Tube Length (mm)

Fin length  (mm)

Fin Tube Quantity (Pc)






Base Tube O.D (mm)

Base Tube Thickness  (mm)

Fin Height (mm)

Fin Thickness  (mm)

Fin Pitch






ASTM A179 is a Standard Specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes. This specification covers minimum-wall-thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus.

Overall, extruded fin tubes offer excellent thermal performance, compact design, and resistance to fouling, making them a popular choice for heat exchanger applications requiring high heat transfer efficiency.

Extruded fin tubes for heat exchanger

Extruded fin tubes for heat exchanger