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An embedded fin tube (also known as a G-fin tube or groove-embedded fin tube) is a high-efficiency heat transfer element where metal fins are mechanically locked into grooves on the base tube’s surface through a specialized process. Its core features and working principles are as follows:
1. Embedded Fin Tube Structure & Manufacturing Process
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Base Tube & Fin Assembly
- Base Tube: Serves as the channel for heat transfer media (e.g., steam, oil). Typically made of seamless carbon steel, stainless steel, or copper tubes for superior thermal conductivity and corrosion resistance.
- Fins: Thin strips of aluminum or copper. Fins are inserted into precision-cut grooves on the tube’s outer surface, forming a tight mechanical bond without welding or wrapping.
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Embedding Process
- Grooves are machined onto the base tube’s exterior.
- Fins are pressed into the grooves using dedicated equipment (e.g., GKL embedding production line), creating a robust physical interlock.
- This ensures high bond strength, with measured pull-off force ≥80N, preventing detachment under thermal cycling.
2. G-fin Tube Performance Advantages
- Enhanced Heat Transfer
- Fins significantly increase the external surface area (high fin ratio), improving heat exchange efficiency. Fin arrangement induces airflow turbulence, boosting convective heat transfer.
- High Temp/Pressure Resistance
- Permissible media temperature: 280°C–400°C; excellent thermal shock resistance. Maximum pressure rating: ≤32MPa, suitable for demanding industrial environments.
- Durability & Stability
- Mechanical embedding eliminates welding-induced heat-affected zones, preserving base tube integrity. Fins resist deformation, ensuring long-term reliability.
3. Groove Embedded Fin Tube Materials & Specifications
- Base Tube: Carbon steel, stainless steel, copper (wall thickness ≥2mm).
- Fins: Aluminum strip (thickness: 0.35–0.4mm) or copper.
- Standard Tube Sizes: DN16–DN38 (metric).
4.Embedded Finned Tube Key Applications
- Industrial: Air coolers, petrochemical heaters, power plant heat exchangers, waste heat recovery systems.
- Commercial: Large-scale building heating radiators, material drying equipment.
- Space-Constrained Scenarios: Compact heat exchange units requiring high efficiency.
5.Embedded Fin Tube Comparison with Similar Products
| Feature | Embedded Fin Tube | Aluminum Extruded Fin Tube |
|---|---|---|
| Structure | Fins locked in base tube grooves | Monolithic aluminum extrusion |
| Thermal Conductivity | Depends on base tube (steel/copper) | Relies on aluminum’s conductivity |
| Application | High-temp/pressure industrial systems | HVAC, electronics cooling |
| Service Life | Longer (base tube resists corrosion) | Moderate |
Embedded fin tubes deliver exceptional heat transfer reliability in extreme industrial environments through their unique mechanical locking design, making them critical components in energy, chemical, and heavy industries.
Embedded fin tube is a heat exchange element that increases the heat exchange area by directly processing multiple grooves on the surface of the steel tube to form a fin-like structure. This structure enables the embedded fin tube to provide a larger heat dissipation area in a smaller space, which is particularly suitable for space-constrained occasions, such as computer CPU radiators, etc.
Structural characteristics of embedded fin tubes
The structural characteristics of embedded fin tubes include:
Processing method: Directly process multiple grooves on the surface of the steel tube to form a fin-like structure.
Heat dissipation effect: Due to its unique structure, the embedded fin tube can provide a larger heat dissipation area in a smaller space and improve the heat exchange efficiency.
Application scenarios of embedded fin tubes
Due to its compact structure and efficient heat dissipation performance, embedded fin tubes are mainly used in the following scenarios:
Computer CPU radiator: Due to space constraints, embedded fin tubes can provide sufficient heat dissipation area to meet the needs of high-performance computing.
Air cooler, heat exchanger, heater, economizer : These devices require efficient heat transfer and compact structural design, and embedded fin tubes can meet these requirements.
Embedded fin tube manufacturing process and cost
The manufacturing process of embedded fin tubes is relatively complex and the cost is high, but its service life is long. In contrast, the manufacturing process of aluminum fin tubes is relatively simple, the cost is low, but the service life is short.
