A high-frequency resistance welded finned tube, also known as a high-frequency welded finned tube or spiral steel solid finned tube, is an efficient heat exchange element formed by welding fins to a base tube using high-frequency current. Its core advantages include high welding strength, low thermal resistance, and a large heat dissipation area, making it suitable for various scenarios such as industrial high-temperature, corrosive environments, and civilian heating applications.
High-Frequency Resistance Welded Finned Tube Process Principle
Using a 200-400kHz high-frequency current to generate strong electromagnetic induction, a high temperature of 800-1000℃ is instantly formed, causing the fins and base tube to melt and fuse, forming a metallurgical-grade bonding layer. The welding strength can reach 150-200MPa, and the thermal resistance is controlled at 0.0005-0.0008㎡・K/W.
High-Frequency Resistance Welded Finned Tube Structural Design
Base tube: 20# seamless carbon steel is selected for industrial high-temperature applications, 316L stainless steel for corrosive environments, and copper tubes are commonly used for civilian heating.
Fins: Spiral (industrial plants), serrated (metallurgical workshops), straight (food processing).
Form: Length 0.5-6 meters, supporting flange, threaded, or welded connections.
High-Frequency Resistance Welded Finned Tube Performance Advantages
Durability: Service life of 10-15 years, resistant to extreme temperature differences (-270℃ to 800℃).
Economy: Heat dissipation area is 5-8 times greater than that of a bare tube, and thermal efficiency is stable at over 92%.
High-Frequency Resistance Welded Finned Tube Application Scenarios
Industrial: Power plant boilers, chemical equipment, waste heat recovery.
Civilian: Household air conditioner outdoor units, greenhouse heating.
Parameters of high-frequency resistance welded finned tubes
| Parameter Category | Specific Parameters |
|---|---|
| Base Tube Material | 20#, 304, 316, Alloy Steel (Alloy) |
| Fin Material | Carbon Steel, Stainless Steel, Alloy Steel |
| Base Tube Diameter | 18-273mm |
| Fin Thickness | 0.6-3.5mm |
| Fin Spacing | ≥4mm |
| Fin Height | 10-25mm |
| Process | High-Frequency Welding, Rapid Cooling |
Example diagram of high-frequency resistance welded finned tubes
