Stainless Steel Extruded Finned Tubes (Bimetallic Extruded Finned Tubes)
Stainless Steel Extruded Finned Tubes are high-performance, highly reliable heat exchange components engineered for demanding thermal applications.
- Base Tube: Made of high-grade stainless steel (ASTM A213 / A312 TP304, TP304L, TP316, TP316L) to resist internal pressure and medium corrosion.
- Outer Fin Sleeve: Made of aluminum Aluminum 1060 / 1100 / 6063 (or copper) and directly formed into continuous spiral fins via specialized high-pressure cold extrusion.
Datang-Stainless Steel Extruded Finned Tube Manufacturer
This advanced cold-extrusion technology for extruded integrated rolled finned tubes ensures a seamless and tight mechanical bond between the base tube and the fins. This maximizes the heat transfer surface area, eliminates thermal resistance, and significantly boosts overall heat exchange efficiency. Compared with plain tubes, the heat transfer surface area is substantially increased, while heat loss is reduced by approximately 15%.
Stainless Steel Extruded (Bimetallic) Finned Tubes
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Optimized Upfront Costs: Streamlines overall heat exchanger design to reduce initial procurement expenses.
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Low Maintenance & Easy Cleaning: Highly durable structure minimizes long-term maintenance and operational downtime.
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Enhanced System Safety & Stability: Delivers superior process reliability under demanding operating conditions.
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Extended Service Life: Exceptionally durable construction achieves a long operational lifespan of 15 to 20+ years.
Stainless Steel Extruded (Bimetallic) Fin Tubes Common Specifications & Parameters
| Parameter Item | Common Specification Range |
| Base Tube Material | ASTM A213 / A312 TP304, TP304L, TP316, TP316L, etc. |
| Fin Material | Aluminum 1060 / 1100 / 6063 |
| Base Tube Outer Diameter (OD) | 5/8″ (15.88mm) – 1.5″ (38.1mm) |
| Fin Outer Diameter (Fin OD) | 25mm – 60mm |
| Fin Pitch | 2.1mm – 3.2mm (Equivalent to 8 – 12 Fins Per Inch / FPI) |
| Fin Height | 8mm – 16mm |
| Max. Operating Temperature | Approx. 300°C – 350°C (Limited by the softening point of aluminum) |
Stainless Steel Extruded Fin Tube Components
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Stainless Steel TubesMaterial Selection: Primarily stainless steel, with standard grades including 304/304L, 316/316L, 321, and 317L. For extreme corrosion or high-pressure operating conditions, duplex stainless steel (such as 2205) is also utilized.
Function: As the core pressure-bearing and corrosion-resistant component, it is responsible for conveying internal heat transfer media (such as steam, thermal oil, water, etc.). It determines the pressure rating and internal corrosion resistance of the entire finned tube.
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Aluminum FinsStandard Materials: High-purity Aluminum (1060 / 1100 / 6063); pure copper available for specialized applications.
Thermal Performance: Extruded into continuous spiral fins that dramatically increase the external surface area, maximizing heat transfer with ambient air or flue gas.
Base Tube Protection: Completely seals the underlying stainless steel base tube, blocking ambient moisture and air to prevent atmospheric corrosion. -
Extruded Fin Tube MachineOur advanced extruded finned tube production line is capable of manufacturing extra-long tubes up to 15–18 meters, significantly reducing girth welds while minimizing potential leakage risks and inspection costs.
Equipped with state-of-the-art multi-head high-speed extrusion units, our daily output per machine reaches 2 to 3 times that of traditional equipment. This enables us to easily handle high-volume bulk deliveries for major refinery and air-cooler projects exceeding tens of thousands of meters, shortening delivery lead times by 40%.
Extruded Aluminum Fin Tube Advantages
Datang offers the widest variety of sizes available for extruded fin tube in the industry.
1. 100% fin-to-tube bond providing exceptional efficiency and longevity.
2. Excellent corrosion protection on the base tube.
3. Easy to clean with a high-pressure water jet without deforming the fins.
4. As the outer sleeve is continuous No galvanic corrosion between the tube and fins.
5. The bonding of the outer and inner tubes removes the risk of loss of contact with the aluminium due to thermal stress and fins are vibration resistant.
6. Higher heat transfer performance for the life of the unit.
7. Extruded Fin tubes are commonly used in applications with temperature up to 325 °c.
Customizable Extruded Fin Tube | Bimetallic Finned Tube
We can customize the material, specification and length according to your requirements.Solve your problems anytime and anywhere. Customize fin tubes and equipment according to your needs. Provide free technical guidance. Welcome to customize with drawings, so that you can purchase without worries.
Strict Quality Inspection
Hydrostatic Pressure Test: The inner base tube is filled with water and tested at 1.5x design pressure (or per ASTM A1016), held for 10–30 seconds to guarantee zero leakage or permanent deformation along the tube and welds.
Pneumatic Underwater Air Test: Pressurized with dry compressed air (0.6–1.0 MPa) and fully submerged in water for over 1 minute—ensuring absolute zero bubble leakage for maximum operational integrity.
Stainless Steel Extruded Fin Tubes Package
To ensure seamless global delivery, your stainless steel extruded finned tubes are packaged in fumigation-free wooden cases (or heavy-duty steel frame crates) lined with custom comb separators and moisture-proof film, combined with protective pipe end caps. This guarantees zero fin damage, prevents bending along extra-long tubes, and ensures worry-free moisture protection during ocean freight and custom clearance.
Clear shipping marks and handling labels (moisture-proof/fragile) are stenciled on the exterior to fully meet all ocean transport requirements for rust prevention, anti-deformation, and customs quarantine.
Extruded Finned Tube Quality Checks
Each of our extruded fin tube is subjected to stringent quality checks.Inspection and Tests Performed:
1.Chemical Composition inspection.
2.Mechanical Properties Test(Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Hardness, Impact Test).
3.Surface and Dimension Test.
4.No-destructive Test.
5.Hydrostatic Test.
Case Study
Case Study: 15.875×1.65x17697mm bimetal extruded fin tubes custom-made by Datang for Pakistan. Zero thermal resistance & full QA/QC loading video inside. Backed by 19 years of expertise and CNAS-certified testing, our premium tubes guarantee exceptional heat transfer efficiency and long-term reliability.
Boosting Efficiency with High-Performance Extruded Fin Tubes
When our client from Singapore approached us, they faced a critical challenge: their existing heat exchange equipment was inefficient, leading to escalating energy consumption and higher operational costs. They needed a solution that could maximize heat transfer within their current system constraints.
Tired of frequent downtime caused by corroded fin tubes? Read this case study to see how Datang’s robust extruded aluminum finned tubes saved a major Pakistan paper manufacturing plant from high maintenance costs. Discover how our 19 years of industry expertise and premium materials deliver lasting reliability and efficiency for your critical operations.
Discover how our custom air cooled heat exchangers with copper-aluminum extruded fin tubes optimized cooling for an Algerian refinery. Operating in intense desert heat, high-strength extruded fins completely shield inner copper tubes from sandstorms, boosting cooling capacity by 20% and maintaining maximum processing throughput during punishing peak-temperature months.
Recently, a valued client from Turkey ordered 1,860 pieces of high-precision extruded fin tubes (Fin OD: 57mm, Fin Pitch: 2.3mm). Discover how Datang Finned Tube delivered 1,860 high-precision extruded fin tubes to Turkey with 100% visible quality control and zero risk.
Extruded (Bimetallic) Finned Tubes Application
Cooling oil radiators element of the Extruded fin tubes.It can transfer heat quickly and improve the efficiency of thermal energy utilization.
The main advantages of Extruded fin tubes for refinery air coolers include high efficiency, corrosion resistance, low noise, energy saving and environmental protection.
Extruded fin tubes for drying radiators,The extrusion process ensures a tight connection between the fins and the tube body, thereby greatly increasing the heat dissipation area and significantly improving the heat exchange efficiency. This design allows heat to be transferred to the material faster and improves drying efficiency
Extruded finned tubes for waste heat recovery equipment,aluminum extruded fin tubes have the characteristics of high heat transfer performance and low thermal resistance, which can quickly absorb and dissipate heat, further improving the heat exchange efficiency.
Extruded finned tubes for heat exchangers in food factories,The steel-aluminum extruded finned tube adopts a compact structure design, which can achieve efficient heat exchange in a limited space. At the same time, its compact structure is also easy to install and maintain.
Extruded finned tubes for milk pasteurization heat exchangers,extruded spiral fin tubes have excellent thermal conductivity and corrosion resistance, and can operate stably for a long time in harsh working environments.
Extruded fin tubes for thermal oil heat exchangers,aluminum fins have good thermal conductivity and can effectively transfer heat from the inside of the tube to the outside of the tube, thereby improving heat exchange efficiency. At the same time, the design of the fins can increase the heat exchange area and further improve the heat exchange performance.
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Extruded Fin Tube FAQs
A: Extruded fin tube production line 30.
A: We can provide extruded fin tube samples for free.
A: After you confirm extruded fin tube sample details, the samples will be ready for delivery in 3-7days,and will be sent to you via express and arrive in 3-5days.
A: extruded fin tube can be customized, we can make the new thermoforming or extruding mode based on your drawings and we can sign a confidentiality agreement about your patented product, pls contact us for any further information.
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.