Extruded rolled finned tubes, also known as steel aluminum composite rolled fin tubes, are key heat transfer components used in drying equipment and hot air heating systems.
Manufactured through advanced extrusion rolling technology, the aluminum fins are mechanically bonded with the base tube to achieve a metallurgical-level connection. This process creates excellent thermal conductivity, high mechanical strength, and long service life compared with traditional smooth tubes and conventional wrapped fin tubes.
These finned tubes are widely used in industrial drying applications, including food drying, agricultural product drying, wood drying, chemical drying, and other hot air circulation systems where high heat transfer efficiency and reliable operation are required.
The integrated aluminum fin structure provides a larger heat transfer surface area, significantly improving heat exchange performance compared with bare tubes.
The extrusion rolling process creates a tight mechanical and thermal connection between the aluminum fins and the tube, reducing thermal resistance and improving overall efficiency.
The composite structure provides good resistance to vibration, thermal expansion, and long-term operation in industrial drying environments.
Extruded rolled finned tubes are ideal for:
| Parameter | Specification |
|---|---|
| Product Name | Extruded Rolled Finned Tube |
| Alternative Name | Steel Aluminum Composite Rolled Fin Tube |
| Application | Drying Equipment, Hot Air Heating Systems, Heat Exchangers |
| Manufacturing Process | Extrusion Rolling Process |
| Tube Material | Carbon Steel, Stainless Steel, Other Alloy Tubes |
| Fin Material | Aluminum |
| Bonding Method | Mechanical Extrusion Bonding / Metallurgical-Level Contact |
| Fin Spacing | 2.5–4 mm (Customized Available) |
| Recommended Air Velocity | 2–3 m/s |
| Installation Type | Modular Tube Bundle Installation |
| Suitable Media | Hot Air, Steam, Thermal Oil, Heating Fluid |
| Surface Treatment | Anti-corrosion Coating Available |
| Application Environment | Drying Rooms, Industrial Heating Systems, Humid or Dusty Conditions |
The correct fin spacing is important for maintaining heat transfer efficiency and preventing dust accumulation.
Dusty or high-humidity environments:
Recommended fin spacing: 3–4 mm
Larger spacing helps reduce clogging and makes cleaning easier.
Clean and low-humidity environments:
Recommended fin spacing: 2.5 mm
Smaller spacing increases heat transfer surface area and improves thermal performance.
During system design, air velocity should be properly controlled.
The recommended airflow velocity for drying equipment heat exchangers is generally:
2–3 m/s
Excessive air velocity may cause:
For drying environments with moisture, sulfur compounds, or chloride content, corrosion protection should be considered.
Recommended solutions:
For easier maintenance and higher system reliability:
Compared with traditional smooth tubes and wrapped fin tubes, extruded rolled finned tubes provide higher heat transfer efficiency, stronger bonding performance, and longer service life.
They are an efficient solution for modern industrial drying systems requiring stable heating performance, energy saving, and reliable operation.
