¿Qué es el tubo con aletas dentadas extruidas?

Los tubos con aletas dentadas extruidas son tubos bimetálicos cuya superficie exterior de aluminio tiene aletas mediante deformación plástica en frío, pero la aleta de aluminio es dentada, lo que mejora en gran medida la capacidad de transferencia de calor del tubo de aleta.

¿Cómo fabricar el tubo con aletas dentadas extruidas?

Inserte el tubo en el tubo del manguito de aluminio-->comprimir o enrollar-->Derrado las aletas-->pelado de tiras-->lavado--prueba de presión-->soplado-->embalaje.

La aleta dentada está hecha de un tubo exterior de aluminio con una pared gruesa (manguito) que está alineada sobre un tubo base interior. Los dos tubos se empujan a través de tres ejes con discos giratorios que exprimen o extruyen las aletas de aluminio hacia arriba y hacia afuera del material del manguito en forma de espiral en una sola operación. Después de eso, serró la aleta en 12 o 24 dientes. Como resultado, la base de los tubos queda completamente conectada al tubo principal. Además, las aletas dentadas aumentan el área de flujo de los gases de combustión y aumentan el efecto de túnel de viento y se reduce la diferencia de presión en ambos lados de la aleta.

 Tamaño y material del tubo con aletas dentadas extruidas  :

Extruded serrated finned tube advantages:

1. 100% fin-to-tube bond providing exceptional efficiency and longevity.

2. Excellent corrosion protection on the base tube.

3. Easy to clean with a high-pressure water jet without deforming the fins.

4. As the outer sleeve is continuous No galvanic corrosion between the tube and fins.

5. The bonding of the outer and inner tubes removes the risk of loss of contact with the aluminium due to thermal stress and fins are vibration resistant.

6. Higher heat transfer performance for the life of the unit.

7. Extruded Finned tubes are commonly used in applications with temperature up to 325 °c.

8. Liner tube incased in aluminum for maximum corrosion protection.

The extruded finned tubes are produced by compressing an aluminum tube or sleeve, onto the base tube. The bloom is exposed to very high pressures which essentially "grows" the fins into the final fin profiles. This process manufactures an excellent strong joint with great resistance (fin stiffness) as well as exceptional heat transfer capabilities (longevity, temperature range). The advantage of extruded fin tubes are full protection of bare tube against corrosion and fin has high mechanical strength. Extruded finned tubes provide the most stable performance over time as compared to the other fin types. The fin is rolled from an outer aluminum tube by a process using pressure to create a rolled "pressure bond" between the liner tube and fins. The aluminum fin material completely encloses the tube, except at the ends where a tube coating can be applied.

Extruded serrated finned tube application:

Primarily extruded finned tubes are used in high temperature conditions and corrosive atmospheric conditions, such as operating temperatures less than 300°C or off-shore applications; heat pipes air to air heat exchangers for HVAC applications, air dehumidification in air treatment plants, energy recovery in air exhaust system. This kind of fin design is the least economical as compared to the other fin types; main reason due to the increased amount of aluminum used around 40% also increased labors during the manufacturing. However this increased cost can be compensated if using lower grade parent tube material. Air Cooler,Air preheater,Charge Air Chiller, Condenser,Evaporator, Fluid Cooler, Gas Cooler,Oil Cooler, Radiator, Refrigeration,Steam to Air Heat Exchanger etc.

Extruded Serrated Finned Tube, Extruded Finned Tube, Serrated Finned Tube, Bi-metallic Fin Tubes

In order to forward you a promt offer for the finned tube, we would be pleased to receive you detailed enquiry including:

• Base tube material 

• Base tube size (OD x WT x Length)

• Fin material

• Fin type

• Fin diameter or height

• Fin thickness

• Fins per inch, meter or fin pitch

• Lenght of plain, unfinned ends

• Finned Tube Quantity

(Additional fabrication, such as bend or weld the tubes into tubeplate or assembly)

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