High Frequency Welded Finned Tube
A high frequency welded finned tube is a highly efficient heat transfer component formed by bonding metal fins to the surface of a base tube (e.g., steel or copper tube) using highfrequency welding. The process leverages the skin effect and proximity effect generated by highfrequency current to melt the contact surfaces between the fin and the base tube, achieving a metallurgical bond that enhances heat transfer efficiency.
Materials
Base Tube Materials: Carbon steel (e.g., Grade 20), stainless steel (304/316L), copper, titanium alloys.
Fin Materials: Aluminum, copper, carbon steel, or stainless steel, typically matched with the base tube for welding compatibility.
Special Applications: Galvanized, aluminized, or composite materials may be used for corrosion resistance.
Dimensions & Specifications
Base Tube OD: Typically Φ12–Φ273mm.
Fin Height: 5–25mm (customized based on heat dissipation requirements).
Fin Thickness: 0.2–2.0mm.
Tube Length: 0.5–12 meters (segmented or custom extralong sizes available).
Fin Density: 100–300 fins per meter (affects heat transfer area and airflow resistance).
Features & Advantages
High Heat Transfer Efficiency: Fins significantly increase the heat exchange area, achieving 3–10x higher efficiency than bare tubes.
Compact Design: Delivers high heat exchange capacity in limited spaces, ideal for densely packed equipment.
Strong Welding Bond: Metallurgical bonding eliminates gaps between fins and the base tube, offering excellent vibration and thermal fatigue resistance.
Corrosion Resistance: Material selection or surface treatments adapt to harsh environments (e.g., flue gas, chemical media).
Long Service Life: Stable welding process ensures a lifespan exceeding 10 years.
Applications
Industrial Heat Exchangers: Waste heat recovery, boiler economizers, and air preheaters in petrochemical and power plants.
HVAC Systems: Chillers, fan coil units, and heat pump systems.
Environmental Equipment: Flue gas desulfurization (FGD), industrial exhaust cooling.
Other Fields: Food drying, marine engine cooling, solar thermal systems.
