G-Type Embedded Finned Tubes: Manufacturing and Industrial Applications
1. G Type Embedded Fin Tube A179 Bare Tube Aluminum G Fin Introduction
G-type embedded finned tubes represent an advanced heat transfer technology where fins are mechanically locked into precision-grooved base tubes. This design combines the thermal efficiency of extended surfaces with robust mechanical integrity, making it suitable for demanding industrial applications ranging from petrochemical plants to power generation systems.
2.Embedded Fin Tube Manufacturing Process
The production involves three critical stages:
- Base Tube Preparation: Machining helical grooves on outer surfaces with controlled depth (0.35-0.5mm) and pitch
- Fin Embedding: Aluminum/copper fins are cold-worked into grooves under pressure, achieving:
- Pull-out resistance: ≥80N (aluminum fin tearing before detachment)
- Thermal contact resistance: Near-zero metallurgical bonding
- Quality Control: Includes dimensional verification and leak testing per ASME standards
3.G Type Embedded Fin Tube Material Specifications
ComponentMaterial OptionsKey PropertiesBase TubeCarbon steel, Alloy steel,
Stainless steel, Duplex steel, CopperMax temp: 400℃
Pressure rating: 10MPaFinsAl 1060, Al 1100,
T2 Copper (C11000)Thickness: 0.5-1.5mm
Thermal conductivity:
Al: 237 W/m·K, Cu: 401 W/m·K
4.G Type Finned Tube Technical Parameters
ParameterValue RangeMeasurement StandardTube Diameter20-51mmISO 9309Fin Height≤50% of tube ODASTM B881Fin Pitch2-12 fins/inchBS EN 12452Operating Temp-40°C to +400°CASME PTC 12.5
5. Embedded Fin Tube G Fin Industrial Applications
5.1 Energy Sector
- Power Plants: Condensers for turbine exhaust (heat recovery efficiency ↑30%)
- Nuclear: Auxiliary cooling systems with stainless steel base tubes
5.2 Process Industries
- Oil & Gas: Natural gas coolers with copper fins for corrosion resistance
- Chemicals: Reactor cooling jackets (duplex steel tubes for acidic media)
5.3 Environmental Systems
- Waste Incineration: Air preheaters handling 300°C flue gases
- HVAC: Ammonia-based refrigeration units
6.Embedded Finned Tube Performance Advantages
- Thermal: 5-10x heat transfer area vs. bare tubes
- Mechanical: Vibration-resistant design for compressor coolers
- Economic: 25% lower pressure drop than welded fins in air coolers
7. Embedded Finned Tubes for Heat Exchanger Maintenance Considerations
- Periodic fin straightness inspection in high-velocity applications
- Chemical cleaning recommended for fouling services (e.g., steel mill exhaust)
