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Aluminum L-Foot Tension Wound L-Type Fin Tube

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November 28, 2025
Connexion De Catégorie: tubes d'échangeur de chaleur
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#tubes d'échangeur de chaleur #tube d'acier au carbone #tube en acier à haut carbone
Bref: Observe the step-by-step operation and see practical examples of usage. This video provides a detailed walkthrough of the Aluminum L-Foot Tension Wound L-Type Fin Tube, showcasing how the overlapped LL-type fins are helically wound around a carbon steel base tube. You will learn how this construction creates a complete metallic jacket, enhancing corrosion protection and heat transfer efficiency for various heat exchanger applications.
Caractéristiques Du Produit Connexes:
  • Overlapped LL foot design completely covers the carbon steel tube, providing full tube sheathing and superior external corrosion protection.
  • Helically wound fins under controlled tension ensure high fin-to-tube contact pressure, minimizing thermal contact resistance.
  • Mechanical winding and interlocking LL geometry provide stable fins under thermal cycling, vibration, and flow-induced stress.
  • Smooth, continuous fins with uniform pitch offer good cleanability and low fouling tendency for gas-side applications.
  • Combines carbon steel base tube strength with aluminum or copper fin conductivity for optimal heat transfer performance.
  • Suitable for air-cooled and gas-side heat exchanger service in power, petrochemical, and industrial applications.
  • Available with base tubes compliant with international standards including ASTM, EN, JIS, GB, and GOST.
  • Customizable fin geometry including height up to 16mm and pitch ≥2.3mm to balance heat transfer and pressure drop.
FAQ:
  • How does the LL type fin tube compare with standard L type and KL type fin tubes?
    LL type fin tubes provide better corrosion resistance than standard L type by overlapping fin feet to completely enclose the tube, approaching extruded fin performance at lower cost. KL type offers maximum performance with knurling for better bonding but is typically more expensive.
  • Will the fins stay tight during long-term operation under thermal cycling and vibration?
    Yes, LL fins are tension wound and mechanically locked by overlapping feet, maintaining strong grip on the tube even under repeated heating and cooling cycles.
  • Is the LL type fin tube suitable for my specific gas temperature and environment?
    For aluminum fins, typical design temperatures are 150-170°C, with higher limits possible based on design and alloy. Copper fins can handle higher temperatures. The full tube coverage provides extra protection in corrosive environments like coastal areas or acidic flue-gas conditions.
  • How do I select the appropriate fin height and pitch for my application?
    Typical LL fin height is ≤16mm with pitch ≥2.3mm. Higher fins and tighter pitch increase surface area but raise pressure drop and fouling risk. A competent supplier can optimize geometry based on your duty conditions.
  • Are the base tubes and fins compliant with international pressure-part standards?
    Yes, carbon steel base tubes are supplied to recognized standards including ASTM A179, A192, A210, A106; EN 10216-2; JIS G3461; GB/T 5310; and GOST specifications, ensuring safe use in boilers and heat exchangers.
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