Bimetal Finned Tube Air Cooler, Fin Fan Cooler
A Bimetal Finned Tube Air Cooler is a specialized heat exchanger designed to maximize heat transfer efficiency by combining the strength of a core tube with the superior thermal conductivity of aluminum fins. This configuration is widely used in industries like oil and gas, power generation, and chemical processing.
Optional Finned Tubes:
1. Extruded (Bimetal) Finned Tubes
2. G-Type (Embedded) Finned Tubes
3. L-Type Finned Tubes
4. LL-Type (Wrapped) Fin Tubes
Bimetal Finned Tube Air Coolers Manufacturer
A Bimetal Finned Tube Air Cooler is a high-efficiency industrial heat exchanger widely used in the chemical, petrochemical, and power generation industries. It features a composite structure where aluminum fins are bonded to a steel base tube, combining the strength of steel with the superior thermal conductivity of aluminum to optimize performance and cost.
These devices use steel-aluminum composite finned tubes as the core component. The inner layer is a carbon steel or stainless steel base tube, and the outer layer is an aluminum fin. The two are tightly bonded together through a rolling process to form a whole. This structure not only avoids contact thermal resistance problems, but also combines the pressure resistance and corrosion resistance of steel tubes with the lightweight and high thermal conductivity of aluminum, thereby achieving higher heat exchange efficiency and a longer service life.
Bimetal Finned Tube Air Cooler Core Construction
The “bimetal” designation refers to the two distinct materials used to create the composite tube:
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Base Tube (Inner): Usually made of carbon steel, stainless steel, or copper. This tube handles the internal pressure and provides corrosion resistance against the process fluid.
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Muff Tube (Outer): An aluminum sleeve that is mechanically bonded to the base tube. Through a cold-rolling process, the aluminum is extruded to form high, continuous fins.
Bimetal Finned Tube Air Cooled Heat Exchanger Key Benefits
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High Thermal Efficiency: Aluminum has excellent thermal conductivity. By extruding it into fins, the surface area available for air-side cooling increases significantly.
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Atmospheric Corrosion Protection: The aluminum sleeve completely covers the base tube, protecting it from external rust and environmental degradation.
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Mechanical Durability: Unlike “L-foot” or “Wrapped” fins, extruded bimetal fins are integral to the outer sleeve. They won’t loosen or “peel” due to thermal cycling, vibration, or high-pressure cleaning.
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Operating Temperature: Generally suitable for operating temperatures up to 280°C – 300°C.
- Easy Maintenance: The finned surface can be cleaned with high-pressure water jets to remove dust and fouling, maintaining high heat transfer efficiency.
Technical Specifications
| Feature | Typical Range / Description |
| Base Tube Materials | Carbon Steel (A179, A106), Stainless Steel (304, 316L), Copper-Nickel |
| Fin Material | Aluminum (Al1050, Al1060, Al1100) |
| Common Fin Heights | 10mm to 16mm |
| Fin Density | 7 to 12 fins per inch (275 to 450 fins per meter) |
| Applications | Crude oil cooling, steam condensers, gas compressors, charge air coolers |
Comparison of Fin Types
1. Extruded (Bimetal)
The fins are rolled out of the aluminum muff tube. This creates the strongest bond and the best protection for the base tube.
2. G-Type (Embedded)
The fin is mechanically locked into a groove cut into the base tube. It handles higher temperatures (up to 400°C) but offers less protection against atmospheric corrosion.
3. L-Type / LL-Type (Wrapped)
The aluminum fin is wrapped around the tube. While cost-effective, these are more prone to mechanical loosening over time compared to bimetal extruded fins.
Bimetal finned tube air coolers Common Use Cases
Bimetal finned tube air coolers are the standard choice for Air Cooled Heat Exchangers (ACHE) in harsh environments. They are frequently utilized for:
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Cooling crude oil and refined products in refineries.
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Condensing steam in power plants.
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Cooling natural gas in pipeline compressor stations.
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High-humidity coastal installations where corrosion resistance is critical.
Air Cooler Selection and Maintenance Recommendations
- Focus on Workmanship: Select products featuring high bonding strength and excellent airtightness—such as those utilizing embedded (G-type), KLM-type, or high-quality roll-forming processes.
- Consider Operating Conditions: Select appropriate steel tube and aluminum fin materials based on the medium’s temperature, pressure, and corrosiveness.
- Regular Maintenance: Periodically clean dust and dirt from the fin surfaces to maintain heat exchange efficiency.
Bimetal Finned Tube Air Cooler Elements
Bimetal finned tube air cooler primarily consists of the following four core components, which collectively facilitate the heat exchange process between the fluid and the air. These components include the tube bundle, the fan and drive system, the fan hood and structural framework, and auxiliary accessories.
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ASTM A179/ ASME SA179 Seamless Steel Pipe-Heat Exchanger TubesASTM A179 (ASME SA179) is the standard specification for seamless cold-drawn low-carbon steel tubes specifically designed for tubular heat exchangers, condensers, and similar heat transfer apparatus. It is one of the most widely used carbon steel grades in the petrochemical, power generation, and manufacturing sectors.
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In the construction of an Air Cooled Heat Exchanger, the tube bundle acts as the core heat transfer unit, while the finned tubes serve as the fundamental heat exchange elements within that bundle.Common Types:Wrap-on L/LL-Fin,G-Fin / Grooved,Extruded Fin,HFW Fin.Material Combinations:Base Tube SA179/SA106,Fin:Aluminum
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In the design and operation of Air Cooled Heat Exchangers (ACHE),the fan is the power core of an air-cooled system, responsible for forcing ambient air through the tube bundles to achieve thermal exchange for process fluids.Core Components:Blades,Hub and Fan Ring/Shroud. It compensates for the low density of ambient air by forcing convection.
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Fin tube support collar also known as a fin tube clamp, round spacer box, isolation ring,it is suitable for embedded G type finned tube,aluminum finned tube, extruded finned tube and L/ll / KL finned tube, and ismost commonly used in G-type finned tube.
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Air Cooled Heat Exchanger (ACHE) Plugs and GasketsIn the structure of an Air Cooled Heat Exchanger (ACHE), the plug is a small but critical pressure-retaining component. It is installed on the plug header, positioned directly opposite the opening of each individual finned tube.Plug materials:Carbon Steel,Stainless Steel and Alloy Steel.Fin Fan Cooler Plugs are often used in conjunction with gaskets.
Bimetal Finned Tube Air Cooler Water Pressure Test
An bimetal finned tube air cooler water pressure test uses water as the medium. Water is injected into the equipment and pressurized to test the equipment’s sealing and pressure-bearing capacity.
Pressure testing is crucial for the safe operation of fin fan air coolers. It allows for the timely identification and resolution of equipment problems, such as leaky seals and insufficient pressure-bearing capacity. Failure to identify and address these issues can lead to equipment failures and even accidents. Therefore, pressure testing is not only a test of equipment performance but also a safeguard for industrial safety.
Induced Draft Air Cooler and Forced Draft Air Cooler
Applicable Applications and Features: Suitable for all applications. The tube bundle is placed horizontally, with a 3° or 1% inclination to prevent condensate from accumulating in the tubes.
Advantages: Simple structure, easy installation, and relatively uniform distribution of hot fluid within the tubes and air outside.
Disadvantages: Requires a larger footprint, and greater flow resistance within the tubes than with inclined top tubes.
Bimetal Finned Tube Air Cooler Air Pressure Test
An air pressure test on an air cooler uses gas as the medium. Pressure testing tests equipment performance by applying pressure. Strictly following operating procedures ensures the safety and reliability of the process and results.
Pressure testing is essential after equipment installation or maintenance. It helps verify the equipment’s sealing and pressure-bearing capacity, ensuring that safety incidents such as leaks or ruptures do not occur during operation.
Nondestructive Magnetic Particle Testing of Air Coolers
Nondestructive magnetic particle inspection of air coolers uses magnetic particles as a detection medium to observe defects in air coolers.
Magnetic particle inspection has a sensitivity that can detect discontinuities as narrow as 0.1μm. By combining multiple magnetization methods, magnetic particle inspection is virtually unaffected by workpiece size and geometry, and can detect defects in all directions.
Bimetal Finned Tube Air Cooler Package
Payment Terms:T/T, LC
Delivery: 15-30 days after payment
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Iron frame packing boxes and the desiccants are put into each package for continental transportation as well. or as required
Bimetal Finned Tube Air Cooler Application
The spiral fin tube radiator for vegetable and flower greenhouse is an efficient and durable heating equipment, especially suitable for greenhouse cultivation in cold seasons.
During the breeding and brooding process, the high-frequency welded fin tube radiator improves the heat exchange efficiency by increasing the heat dissipation area, and can raise the temperature in the brooding house to the required level in a short time. This design enables the farm to quickly reach and maintain a suitable temperature range (15-20 degrees Celsius) when heating in winter.
Hot-dip galvanized spiral wound fin tube for greenhouse heating, as a key component of the heating system, can efficiently and evenly transfer heat to keep the temperature in the greenhouse within a suitable range
As a high-efficiency heat exchange element in modern industrial and civil heating systems, the unique design of the helical tension wound finned tube radiator for steam heating not only significantly improves the heat transfer efficiency, but also optimizes the space utilization rate, becoming an indispensable thermal energy source in many fields. equipment.
The working principle of the crimped fin tube is based on the principles of heat conduction and convection. When the hot water or steam of the heating system flows through the finned tube, the heat is quickly transferred to the heat sink through the fins and then dissipated into the air. This design makes the heat exchange more efficient and is particularly suitable for workshop environments that require a lot of heat dissipation.
Related Product
Bimetal Finned Tube Air Cooler FAQs
A: The air cooler can be customized. We can produce it according to your drawings, and we can sign a confidentiality agreement for your patented products. For more information, please contact us.
A: Always a pre-production sample,before mass production;always final inspection before shipment.
Inspection & Guarantee Certificate is supplied with shipment, and the Third Party Inspection is available.
A: One year after shipping.
A: We have workshop can supply all parts of the air cooled heat exchanger, and 90% of spare parts can be distributed to any
place in the world within one week!
A: We can arrange for experienced engineers to provide online video guidance on product installation and train your staff on equipment operation and maintenance.
A: We have many professional and technical personnel, more competitive prices and better after-dales service than other companies.
A: Datang has high frequency resistance welding finned tube production line 18, extruded finned tube equipment 30, laser welding finned tube production line 2, wound finned tube production line 12. The annual capacity can reach 100,000 tons, the specification φ 18-273mm finned tube, according to the customer requirements of the standard production, service has exceeded 3000+ enterprises.