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YouHeng is a leading enterprise specializing in the R&D, production, and customization of aluminum alloy structural profiles. We operate advanced extrusion production lines, CNC machining centers, and surface treatment facilities, dedicated to providing customers with high-strength, lightweight, and customizable aluminum profile solutions. YouHeng has become a reliable partner for numerous domestic and international clients in industries such as construction, machinery, and transportation, thanks to our extensive engineering expertise and flexible production capabilities.
With the continuous development of industrial and heating technologies, radiator design is evolving toward higher efficiency, more compact size, and better aesthetics. Flat oval tubes, due to their unique cross-sectional shape and excellent heat transfer performance, are becoming an important material choice in modern radiator design. Whether for residential heating, automotive cooling, or industrial heat exchange systems, flat oval tubes provide stable and efficient thermal support.
Why Flat Oval Tubes Are Suitable for Radiators
Residential Heating / Automotive Cooling / Industrial Heat Exchange / New Energy Systems
Flat oval tubes excel in heat transfer efficiency, structural strength, and spatial adaptability, making them highly suitable for various heat dissipation and exchange applications.
- Large Heat Transfer Area – The flat oval shape offers a larger surface contact area within a limited space, enhancing heat exchange efficiency.
- Optimized Fluid Resistance – Streamlined inner channel design facilitates fluid flow and reduces pressure loss.
- Compact Structure – The flat profile allows for dense arrangement, saving installation space.
- High Strength and Pressure Resistance – Rounded transitions minimize stress concentration, providing excellent pressure-bearing capacity.
- Easy Welding and Assembly – Flat contact surfaces simplify connection and integration, supporting modular design.
These characteristics make flat oval tubes an ideal choice for manufacturing efficient, lightweight, and reliable heat dissipation systems.
Standard Flat Oval Tube Series Specifications
| Series | Major Axis a (mm) | Minor Axis b (mm) | Wall Thickness t (mm) | Standard Length (m) |
| Small | 20 – 40 | 10 – 20 | 1.0 – 2.0 | 3, 6 |
| Medium | 40 – 80 | 20 – 40 | 1.5 – 3.0 | 3, 6 |
| Large | 80 – 150 | 40 – 75 | 2.0 – 4.0 | 6, 12 |
| Extra Large | 150 – 300 | 75 – 150 | 3.0 – 6.0 | 6, 12 |
Table 1: Small Flat Oval Tubes (6061-T6)
| Specification (a×b×t) | Area A (mm²) | Weight (kg/m) | I_x (10⁴ mm⁴) | I_y (10⁴ mm⁴) | W_x (10³ mm³) | W_y (10³ mm³) | Allowable Moment M_x |
| 30×15×1.5 | 195.30 | 0.527 | 2.12 | 8.45 | 2.83 | 5.63 | 0.679 |
| 40×20×2.0 | 345.60 | 0.933 | 6.72 | 26.90 | 6.72 | 13.40 | 1.61 |
| 50×25×2.0 | 424.10 | 1.145 | 13.10 | 52.50 | 10.50 | 21.00 | 2.52 |
Table 2: Medium Flat Oval Tubes (6061-T6)
| Specification (a×b×t) | Area A（单位：mm²） | Weight（单位：kg/m） | I_x（单位：10⁴ mm⁴） | I_y（单位：10⁴ mm⁴） | W_x（单位：10³ mm³） | W_y（单位：10³ mm³） | Allowable Moment M_x（单位：kN·m） |
| 60×30×2.5 | 635.90 | 1.72 | 27.00 | 108.00 | 18.00 | 36.00 | 4.32 |
| 80×40×3.0 | 1,050.00 | 2.84 | 85.30 | 341.00 | 42.70 | 85.30 | 10.20 |
| 100×50×3.0 | 1,290.00 | 3.48 | 167.00 | 667.00 | 66.70 | 133.00 | 16.00 |
Table 3: Large Flat Oval Tubes (6061-T6)
| Specification (a×b×t) | Area A (mm²) | Weight (kg/m) | I_x (10⁴ mm⁴) | I_y (10⁴ mm⁴) | W_x (10³ mm³) | W_y (10³ mm³) | Allowable Moment M_x |
| 120×60×4.0 | 2,212.00 | 5.97 | 432.00 | 1,728.00 | 144.00 | 288.00 | 34.60 |
| 150×75×4.0 | 2,739.00 | 7.40 | 844.00 | 3,375.00 | 225.00 | 450.00 | 54.00 |
| 200×100×5.0 | 4,398.00 | 11.87 | 2,667.00 | 10,667.00 | 667.00 | 1,333.00 | 160.00 |
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Whether you need standard-length aluminum extrusions or customized ones for immediate assembly, YouHeng can be your reliable manufacturing base. Contact us today for a customized solution and quotation tailored to your project.
Residential and Building Heating Radiators
：Combining Warmth and Aesthetics
In modern homes and commercial buildings, radiators are not only heating devices but also part of interior design. Flat oval tubes help achieve:
- Thinner and more compact radiator profiles, saving indoor space.
- Even heat radiation surfaces, improving comfort.
- Diverse aesthetic designs that blend with modern decor.
- Compatibility with both hot water and electric heating systems.
Residential and Building Heating Radiators
Automotive and Transportation Cooling Systems
：Efficient Heat Dissipation for Reliable Operation
Flat oval tubes play a key role in vehicle engine cooling, air conditioning condensers, and battery thermal management:
- Optimized radiator core structure for improved cooling efficiency.
- Reduced overall weight, contributing to energy savings and emissions reduction.
- Good vibration resistance, suitable for vehicle operating conditions.
- Applicability in new energy vehicle battery and motor cooling modules.
Car radiator
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Whether you need standard-length aluminum extrusions or customized ones for immediate assembly, YouHeng can be your reliable manufacturing base. Contact us today for a customized solution and quotation tailored to your project.
Industrial and Energy Heat Exchange Equipment
：Stable and Reliable Continuous Operation
In industries such as power, chemicals, and machinery, flat oval tubes are commonly used in:
- Air coolers, oil coolers.
- Compressor intercoolers, gas turbine heat exchange modules.
- Waste heat recovery devices, condensers, and evaporators.
- Solar thermal systems, ground source heat pump exchangers.
Their excellent pressure resistance and corrosion resistance adapt to various industrial media and environments.
Power Electronics and Data Center Cooling
：Precise Temperature Control for Equipment Protection
In high-heat applications such as electronic devices, servers, and frequency converters, flat oval tubes are used in:
- Water-cooling plates, liquid cooling modules.
- High-power IGBT heat sinks, power supply cooling modules.
- Data center cabinet-level cooling systems.
- Communication base station cooling devices.
Flat Oval Tubes
Flat oval tubes can be easily combined with aluminum fins, copper base plates, and other materials to form efficient composite cooling structures.
Flat oval tubes, with their unique cross-sectional shape and outstanding thermal performance, are driving innovation in heat dissipation technology. From home warmth to vehicle power and industrial operations, flat oval tubes silently and efficiently manage temperature, ensuring system stability.
If you are designing or upgrading a heat dissipation system, consider using flat oval tubes—they may be the key to achieving a more efficient, compact, and reliable cooling solution.
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Whether you need standard-length aluminum extrusions or customized ones for immediate assembly, YouHeng can be your reliable manufacturing base. Contact us today for a customized solution and quotation tailored to your project.