Project Description
- Product Name: Rectangular Finned Tube | Square H Type Fin Tube Manufacturers – Cangzhou Datang Steel Pipe Co., Ltd.
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Rectangular Finned Tube Specifications
| Parameter | Value Range |
|---|---|
| Base Tube Material | Carbon Steel, Stainless Steel, Alloy Steel 13 |
| Fin Material | Carbon Steel Strip, Stainless Steel Strip 2 |
| Tube OD | 25–73 mm |
| Tube Thickness | 2.0–16.0 mm |
| Fin Width | 25–57 mm |
| Fin Length | 50–500 mm |
| Fin Thickness | 1.5–3.5 mm |
| Fin Spacing | 10–50 mm |
Rectangular finned tubes are enhanced heat transfer elements widely used in heat exchange applications. By adding rectangular fins to the base tube surface, they significantly increase the heat dissipation area and improve thermal efficiency. Core characteristics and applications are as follows:
I. Rectangular Finned Tubes Core Features & Technical Parameters
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Structural Design
- Base Tube & Fin Assembly: Base tubes are typically circular or elliptical steel pipes (common materials: carbon steel, stainless steel, copper), externally clad with tightly attached rectangular metal fins (aluminum/copper/steel). Fins are fixed via processes like lamination hot-dip galvanizing3, welding, or mechanical expansion, dramatically increasing heat transfer area.
- Fin Parameters: Fin height: 5–30mm; Thickness: 0.5–4.0mm; Pitch: 3.5–40mm (adjustable to suit different fluid resistance and heat dissipation requirements).
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Performance Advantages
- High-Efficiency Heat Transfer: Heat transfer coefficient increased by approx. 25% compared to plain tubes of same cross-section; air resistance reduced by 15–25%.
- Corrosion Resistance: Hot-dip galvanizing process (zinc layer ≥0.06mm) or use of stainless steel makes them suitable for high-temperature, corrosive environments (e.g., chemical plants, power stations).
- Mechanical Stability: Strong bond between fins and base tube offers excellent vibration resistance and maintains structural integrity during long-term operation.
II. Rectangular Finned Tubes Application Scenarios
- Industrial Equipment
- Power Stations & Petrochemicals: Air coolers, boiler economizers, utilizing finned tube bundles to enhance waste heat recovery from flue gas.
- Heating Systems: Oven radiators, dry-fired heating elements (e.g., stainless steel rectangular finned heater tubes, withstand temperatures >400°C).
- Specialized Fields
- EGR Coolers: Employ stainless steel dimpled fin tubes to boost exhaust gas cooling efficiency.
- HVAC & Refrigeration: Copper finned tubes used in condensers to enhance refrigerant-to-air heat exchange.
III. Rectangular Finned Tubes Selection & Manufacturer Reference
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Key Selection Factors
- Material Compatibility: Prefer stainless steel for high-temperature environments; hot-dip galvanized carbon steel for corrosion resistance; copper inner walls for food/pharmaceutical industries.
- Arrangement: Staggered arrangement enhances disturbance and heat transfer efficiency but increases pressure drop; inline arrangement has lower resistance, suitable for airflow-restricted scenarios.
IV. Rectangular Finned Tubes Future Trends
- Structural Innovation: E.g., twisted rectangular fin tubes enhance fluid disturbance and further improve heat transfer efficiency via fin deformation.
- Composite Material Application: Bimetallic (e.g., steel-aluminum) fin tubes combine strength and thermal conductivity, improving heat transfer efficiency by 20–30% compared to traditional tubes.
When selecting, consider operating temperature, medium corrosivity, and airflow resistance requirements. Prioritize verification of the manufacturer’s fin bonding process (e.g., hot-dip zinc layer thickness) and pressure adaptability.
