Overlapped L Type Fin Tube , LL Finned Tube

Here is the English translation of the description for ‌Overlapped L Type Fin Tube‌:

Overlapped L Type Fin Tube is a highly efficient heat exchange element that improves heat dissipation efficiency through a unique structural design and is widely used in the field of industrial heat exchange.

🔧 I. Structural Definition & Manufacturing Principle

‌Core Design‌:
Metal fin strips (typically aluminum or copper) are pre-bent into an ‌“L” shape‌, creating fins with vertical feet. During winding onto the base tube, adjacent fins’ feet ‌overlap‌ to form a continuous interlocked layer.

‌Manufacturing Process‌:
High-tension spiral winding ensures tight adhesion to the base tube surface, with overlapping sections reinforced by tension to prevent loosening under thermal stress.

⚙️ II. Performance Advantages (vs. Single L-Type)

1. ‌Enhanced Heat Transfer‌

   • Overlapped structure increases contact area between fins and base tube, significantly reducing thermal resistance;
   • Continuous coverage improves airflow turbulence, boosting convective heat exchange efficiency.

2. ‌Superior Mechanical Stability‌

   • Interlocked fin feet provide vibration resistance, suitable for high-vibration environments (e.g., petrochemical equipment);
   • Broader temperature tolerance adaptable to high-temperature applications (dependent on materials).

🧱 III. Materials & Customization

🏭 IV. Industrial Applications

• ‌Energy & Power‌: Boiler air coolers (API 661 compliant), gas turbine heat exchange units;
• ‌Petrochemical & Gas‌: Oil/gas condensers, heat exchangers for corrosive media;
• ‌Refrigeration Systems‌: High-efficiency condenser/evaporator tubes for improved energy efficiency.

💎 Technical Comparison