Extruded Serrated Finned Tube for Heat Exchanger

In heat transfer technology, the extruded serrated finned tube emerges as a pivotal component for elevating thermal efficiency and operational performance. Whether integrated into HVAC systems, industrial heat exchangers, or energy recovery solutions, a thorough understanding of these tubes can significantly optimize your operations.

 

 

Extruded serrated finned tubes are a specialized type of heat transfer tube, distinguished by their unique fin geometry. Unlike conventional finned tubes, they feature serrated aluminum fins formed via cold plastic deformation extrusion. This manufacturing method not only maximizes heat exchange surface area but also boosts overall heat transfer capability, resulting in a bimetallic tube that delivers exceptional efficiency and longevity.

 

 Key Characteristics

 

Bimetallic Construction: These tubes consist of a base tube—typically constructed from materials such as carbon steel, stainless steel, or copper—paired with an outer aluminum sleeve (muff tube).  

Serrated Fins: The fins are created by extruding the aluminum sleeve, forming a serrated profile that enhances heat transfer efficiency by disrupting boundary layers.  

Corrosion Resistance: The aluminum fins offer superior resistance to atmospheric corrosion, ensuring long-term durability even in aggressive environments.  

 

 

The fabrication process of extruded serrated finned tubes comprises several key stages:  

 

1. Insertion: The base tube is inserted into the aluminum sleeve.  

2. Compression/Rolling: The assembly is compressed or rolled to extrude the fins from the aluminum sleeve.  

3. Serration: The fins undergo precision serration, forming 12 or 24-tooth configurations to optimize heat transfer.  

4. Finishing: Secondary processes—including strip peeling, cleaning, and pressure testing—are performed to ensure quality.  

5. Packaging: The finished tubes are prepared for distribution and packaged accordingly.