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Overlapped L Type Fin Tube , LL Finned Tube - Ребристый теплообменник DATANG: Эффективные решения по теплопередаче для ваших нужд.

L KL LL Type Fin Tube/

Overlapped L Type Fin Tube , LL Finned Tube

Материал базовой трубки Carbon Steel Tube,Трубка из нержавеющей стали,Alloy Tube
Материал оребрения Aluminum Strip,Copper Strip
Наружный диаметр трубки 19-51mmmm
Трубчатый ТХК 1.65-3.0миллиметр
Фин Тхк 0.3-0.5миллиметр
Шаг ребер 2.0-5.0миллиметр
Высота плавников 10-16миллиметр

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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 ‌Lshape, creating fins with vertical feet. During winding onto the base tube, adjacent finsfeet ‌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

Component Material Options Key Properties
Base Tube Carbon steel, stainless steel (TP316/316L), copper-nickel alloy Corrosion/high-pressure resistance
Fins Aluminum (lightweight), copper (high conductivity), galvanized steel Aluminum >80% usage for cost-performance balance
Surface Treatment Zinc/aluminum metallization at tube ends Prevents end corrosion (Electro Spray process)

🏭 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

Type Overlapped L-Type Single L-Type Extruded Type
Structural Strength ⭐⭐⭐⭐ (Interlocked) ⭐⭐⭐ (Tension-fixed) ⭐⭐⭐⭐⭐ (Metallurgical bond)
Vibration Resistance ⭐⭐⭐⭐ ⭐⭐⭐ ⭐⭐⭐⭐⭐
Cost Efficiency ⭐⭐⭐⭐ (Balanced) ⭐⭐⭐⭐ ⭐⭐ (High cost)
Note: Extruded type involves base tube-fin extrusion bonding for optimal performance at higher cost.
Common Specifications of L LL KL G Type Embedded Finned Tube
All dimensions are in Inches and specification upon your requests
Наружный диаметр трубки
Высота плавников
Толщина ребер
Fins per Pitch
5/8
3/8,1/2
.015/.016/ .020
6, 7, 8, 9, 10, 11, 12
3/4
5/8,1/2
.015/.016/ .020
6, 7, 8, 9, 10, 11, 12
1
5/8,1/2
.015/.016/ .020
6, 7, 8, 9, 10, 11, 12
1 1/4
5/8,1/2
.015/.016/ .020
6, 7, 8, 9, 10, 11, 12
1 1/2
5/8,1/2
.015/.016/ .020
6, 7, 8, 9, 10, 11, 12
Приложение
Heater Parts
Warranty
1 Year
Tube Length
18 meters max
Высота плавников
16 mm max
Tube Material
Aluminum, Copper And Steel

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