Views: 0 Author: Site Editor Publish Time: 2026-05-21 Origin: Site
Manufacturing Process
The outer metal layer (aluminum/copper) clad on the base tube is rolled and extruded integrally. Fin and base tube are metallurgically bonded without gaps.
Main Advantages
Ultra-low thermal resistance, higher heat transfer efficiency
High mechanical strength, excellent vibration resistance, fins never fall off
No welding seam, avoiding seam corrosion
Good anti-corrosion performance
Working temperature: Aluminum extrusion ≤250–280°C; Copper extrusion up to 300°C
Disadvantages
Higher mold cost, more suitable for mass standardized production.
Typical Application
Air coolers, HVAC systems, marine platforms, seawater desalination, medium & low temperature heat exchange.
Manufacturing Process
Metal strip (carbon steel/stainless steel/aluminum) is spirally wound on the base tube, then fixed by high-frequency welding, laser welding or brazing.
Main Advantages
High temperature resistance: up to 450–600°C
Flexible material matching: dissimilar metal combination for tube and fin
Low production cost, fast delivery, suitable for small batch & non-standard orders
Disadvantages
Weld seam is weak point; higher contact thermal resistance; risk of welding crack and seam corrosion.
Typical Application
Power plant boilers, petrochemical furnaces, flue gas waste heat recovery, high temperature industrial heat exchangers.
Item | Extruded Finned Tube | Welded Finned Tube |
|---|---|---|
Bonding Type | Integral metallurgical bond | Welded connection |
Thermal Resistance | Very low | Relatively high |
Vibration Resistance | Excellent | Medium |
Corrosion Resistance | Superior | General (seam corrosion risk) |
Max Working Temp | 250–300°C | 450–600°C |
Cost | Higher (mass production) | Lower |
Best For | Medium-low temp, harsh corrosion, vibration environment | High temp, high pressure, budget-sensitive projects |
