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Technical Documentation for Aluminium Extruded Fin Tubes
Core Technical Specifications Covering Structure, Manufacturing, Performance, and Applications
I. Material and Structural Design
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Material Selection
- Base tube: Stainless steel or carbon steel for mechanical strength and corrosion resistance.
- Fins: Aluminum or alloy (e.g., steel-aluminum composite) to balance thermal conductivity and lightweight requirements.
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Structural Features
- Metallurgical bonding: Achieved via extrusion, ensuring contact thermal resistance < 0.01 m²·K/W, superior to mechanical attachment.
- Optimized geometry: Fin spacing (2–10 mm), height, and arrangement (spiral/straight) tailored to fluid type (gas/liquid) to maximize turbulence.
II. Manufacturing Process
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Extrusion Technology
- Integrated forming: Base tube and fins are bonded via high-frequency welding or thermal extrusion under controlled conditions (pressure ≥50 MPa, temperature 300–500°C).
- Surface treatment: Aluminum fins require pre-cleaning to remove oxide layers for enhanced adhesion.
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Key Process Parameters
Parameter Typical Range Fin spacing 2–10 mm Fin thickness 0.2–1.5 mm Base tube pressure 0.6–6.4 MPa
III. Performance and Testing Standards
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Thermal Performance
- Heat transfer coefficient: Airside: 30–60 W/(m²·K); liquid side: up to 2000 W/(m²·K).
- Pressure drop: Airside ≤200 Pa at 1–3 m/s flow velocity, validated via CFD simulations.
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Quality Control
- Non-destructive testing: X-ray inspection for weld defects in base tubes.
- Dimensional tolerance: Fin height deviation ≤±0.3 mm; spacing deviation ≤±0.5 mm.
IV. Applications and Selection Guidelines
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Typical Applications
- Power industry: Transformer oil coolers.
- Chemical plants: Waste heat recovery in reactors.
- HVAC systems: Condensers and evaporators.
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Selection Criteria
- High-temperature/corrosive environments: Stainless steel base tubes recommended (＞200°C).
- Forced convection: Reduced fin spacing to enhance turbulence.
V. Maintenance and Limitations
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Maintenance Requirements
- Regular cleaning: Remove dust accumulation in fin gaps to prevent efficiency loss.
- Irreparable damage: Full replacement required due to integrated structure.
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Technical Constraints
- Corrosion susceptibility: Aluminum fins in sulfur-rich environments require protective coatings.
- High initial costs: High-frequency welding equipment limits cost-effectiveness for small-scale production.
Datang Fin Tubes – Professional Manufacturer in Hebei Province
Location: Yanshan County, Cangzhou City, Hebei Province, China
Core Products
- Extruded fin tubes
- Embedded G-type fin tubes
- High frequency welded spiral fin tubes
- Low fin tubes
- Laser welded fin tubes (L/LL/KL types)
- Specialty designs: Internal/elliptical/longitudinal/serrated fin tubes
Applications: Energy-saving & environmental protection equipment
Quality Assurance
✓ 20 years manufacturing experience
✓ ISO 9001 certified quality system
✓ 100% product testing including:
- Water pressure tests
- Fin welding strength pull tests
✓ Triple protection: Pressure/corrosion/oxidation resistance
Production Capacity
- 10,000+ fin tubes/day output
- Advanced facilities:
- Laser/HF welding machines
- Rolling welding systems
- Tensile testing equipment
- Corrosion testing lab
Company Advantages
- Technical: Dedicated R&D team for customized solutions
- Service: 1-year warranty on all products
- Global reach: Competitive pricing attracts worldwide clients
Contact us for reliable heat exchanger solutions!
E-mail: [email protected]
WhatsAPP: +8615690122018
