Laser welding spiral finned tube
1. Laser Welded Finned Tubes
Laser welded finned tubes represent an advanced heat exchange component where fins are bonded to the base tube through high-precision laser welding technology. This process creates a permanent metallurgical bond between the fin and tube, achieving optimal heat transfer efficiency through seamless material integration.
Unlike conventional finned tubes that rely on mechanical expansion or adhesive bonding, laser-welded variants provide superior thermal conductivity and structural integrity, making them ideal for high-performance heat exchange applications across various industries.
2. Laser Welded Finned Tubes Structure and Materials
The fundamental structure consists of a base tube and external fins that are permanently fused together. Base tubes typically range from 0.8-1.5mm in thickness, while fins maintain thicknesses between 0.3-1.0mm with spacing as narrow as 2.0mm. This configuration achieves high fin ratios while maintaining structural stability.
Base Tube Materials
- Carbon steel
- Stainless steel
- Copper
- Titanium alloys
Fin Materials
- Carbon steel
- Stainless steel
- Aluminum
- Copper
Special Combinations
- Dissimilar material pairs
- Corrosion resistance requirements
- Thermal expansion matching
The structural design allows for various fin types including spiral, longitudinal, and segmented configurations, with possibilities for custom geometries to address specific application challenges.
3. Laser Welded Finned Tubes Manufacturing Process
The manufacturing employs high-energy density laser welding systems, typically utilizing automated German-made laser welding equipment. The process involves precisely focused laser beams that instantaneously melt the contact points between fins and base tubes, creating a continuous metallurgical bond with consistent penetration depth.
Process Characteristics:
- Weld penetration rates exceeding 95%
- Minimal heat-affected zone preserving base material properties
- Automated precision ensuring consistent weld quality along entire tube length
- Capability for secondary processing including bending and coiling without compromising weld integrity
- Real-time quality monitoring through vision systems and sensors
4. Laser Welded Finned Tubes Performance Comparison with Similar Products
| Feature | Laser Welded Finned Tubes | High-Frequency Welded | Embedded Finned Tubes |
|---|---|---|---|
| Thermal Resistance | Near-zero contact thermal resistance | Moderate contact resistance | Higher contact resistance |
| Structural Integrity | Full penetration welding, no loosening | Potential root unwelding | Mechanical fixation only |
| Material Economy | Thinner materials possible | Thicker materials required | Limited material options |
| Processing Flexibility | Excellent secondary processability | Limited bendability | Poor reformability |
| Anti-fouling Performance | Smooth transition, minimal fouling | Prone to ash accumulation | Gap accumulation issues |
| Service Life | 30-50% longer than alternatives | Standard lifespan | Shorter service life |
5. Laser Welded Finned Tubes Application
Heat Recovery Systems
Waste heat boilers, economizers, air preheaters in power generation and industrial plants
Process Industries
Heat exchangers in petrochemical, refining, and chemical processing equipment
Heating Systems
Residential wall-hung boilers, commercial building heating systems
Special Applications
Corrosive environments, high-pressure applications, space-constrained installations
Renewable Energy
Solar thermal systems, geothermal heat exchange applications