In the heat exchanger industry, Extruded Finned Tubes are highly regarded by professionals for their outstanding thermal performance.
This performance is achieved through advanced manufacturing rather than a change in the material properties themselves. While a solid tube made entirely of pure copper or aluminum inherently possesses high material thermal conductivity, extruded technology stands out as a highly effective choice for composite (bimetallic) finned tubes—where a robust steel inner tube is required for pressure resistance and an aluminum outer layer is used for cooling.
Aluminium Extruded Finned Tube
Copper Bi-Metal Extruded High Finned Tube
Today, Datang Finned Tube breaks down the actual engineering principles behind why the extrusion process delivers such efficient heat transfer compared to other composite finning methods.
Bimetallic Extruded Finned Tube Core Advantages
1. No Gaps, No Wasted Heat
Under high pressure, the outer aluminum layer is squeezed directly onto the inner tube, merging them into one solid piece.
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The Difference: Traditional wrapped or welded fins leave tiny air gaps or uneven spots.
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The Benefit: Datang Finned Tube’s seamless extrusion eliminates these gaps entirely. Heat flows from the inner tube to the cooling fins smoothly with almost zero loss.
2. Strong Steel & Fast-Cooling Aluminum
We combine a strong steel inner tube with high-performance aluminum fins.
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Aluminum cools things down incredibly fast because its thermal conductivity (237 W/(m.K) is much higher than steel.
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The Benefit: Our advanced technology ensures heat spreads across the aluminum fins instantly, while the steel inner tube safely handles the high pressure of your system.
3. Built to Last Without Losing Efficiency
Industrial machines heat up and cool down constantly, causing metals to expand and shrink.
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The Difference: Older wrapped or low-frequency welded fins often loosen over time, creating gaps that block heat.
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The Benefit: The integrated structure by Datang Finned Tube never loosens or detaches. It maintains its high cooling performance from day one through its entire lifespan.
Long-Term Stability: Maintaining High Efficiency Over Time
In industrial operations, equipment undergoes constant thermal cycling (heating and cooling). This is where the structural integrity of Datang Finned Tube’s extruded solutions truly shines compared to alternative manufacturing methods:
| Finning Technology | Bonding Method | Contact Thermal Resistance | Long-Term Reliability |
| Extruded Type | Metal plastic deformation; integrated molding. | Extremely Low (Virtually Zero) | Extremely High; zero risk of loosening over time. |
| High-Frequency Welded | Fusion welding connection. | Low (but limited by weld uniformity). | High (but weld seams are prone to corrosion/cracking). |
| Wrapped / L-Foot Type | Mechanical tension wrapping. | High (Microscopic air gaps exist). | Low; easily loosens due to vibration or thermal shock. |
Conclusion: For High-Efficiency Heat Transfer, Choose Datang Finned Tube
As a leading manufacturer of high-performance heat exchange components, Datang Finned Tube utilizes premium raw materials and high-precision extrusion technology. We ensure that every single finned tube leaving our facility delivers top-tier heat transfer efficiency and long-term reliability.
Whether you are designing Air-Cooled Heat Exchangers (ACHE), industrial radiators, or boiler systems, Datang Finned Tube is ready to deliver. Contact our expert team today for professional custom solutions and technical support!