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Address: 2, Reading Road,
Edison New Jersey, USA -
Address: 2, Reading Road,
Edison New Jersey, USA
Aluminium Tubes is a leading manufacturer, exporter, and supplier of finned aluminum tubes for heat exchangers, air-cooled condensers, radiators, and process cooling systems across the USA, UK, Europe, Middle East, and 80+ countries. By expanding the heat transfer surface 10–20x over a bare tube, finned tubes let engineers build smaller, lighter, and lower-cost cooling equipment.
We supply L-type, KL-type, G-type (embedded), and integral extruded finned tubes on 6061, 5083, 3003, and 1060 aluminum base tubes — plus aluminum fins on copper, carbon steel, and stainless base tubes — certified to ASTM B221, ASTM B234, and EN 754 with EN 10204 3.1 Mill Test Certificates.
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Finned aluminum tubes are heat exchanger tubes with thin aluminum fins bonded to the outer surface, multiplying the air-side heat transfer area. Because air conducts heat far more poorly than the liquid or refrigerant inside the tube, the fins compensate — a 25mm bare tube gains 10–20x effective surface area once finned at 8–11 fins per inch (FPI).
The result: air-cooled heat exchangers that match water-cooled performance while eliminating water supply, treatment, and disposal costs entirely.
Aluminum strip is tension-wound around the tube with an L-shaped foot covering the tube surface. Economical, good performance to 150°C. The most widely used type for air-cooled condensers and coolers.
The tube surface is knurled before wrapping the L-foot fin, mechanically locking it in place. Better bond, service to 260°C, and superior resistance to thermal cycling than plain L-type.
The fin strip is wound into a machined groove and back-filled with tube material. Strongest mechanical bond — rated to 400°C and immune to fin loosening under vibration. Standard for refinery and power plant air coolers per API 661.
Fins are extruded directly from an aluminum muff tube over the base tube — fin and tube are one piece with zero contact resistance. Best corrosion protection (base tube fully covered) and performance to 300°C. Ideal for marine and coastal installations.
| Parameter | Range / Value |
|---|---|
| Base Tube OD | 9.52mm – 50.8mm (3/8″ – 2″) |
| Base Tube Wall | 0.7mm – 3.0mm |
| Base Tube Materials | Aluminum 6061/5083/3003/1060, copper, carbon steel, SS 304/316 |
| Fin Material | Aluminum 1100/1060 (also copper on request) |
| Fin Density | 7 – 12 FPI (fins per inch) |
| Fin Height | 9.5mm – 16mm |
| Fin Thickness | 0.3mm – 0.5mm |
| Max Length | Up to 12,000mm finned length |
| Standards | ASTM B221, ASTM B234, EN 754, API 661 (G-fin) |
| Certification | EN 10204 3.1 MTC; SGS/BV/TUV on request |
| Property | L-Type | KL-Type | G-Type | Extruded |
|---|---|---|---|---|
| Max Temperature | 150°C | 260°C | 400°C | 300°C |
| Bond Strength | Good | Better | Excellent | Integral (best) |
| Corrosion Protection | Good | Good | Moderate (groove exposed) | Excellent |
| Relative Cost | Base | +10–15% | +25–35% | +40–60% |
| Typical Use | HVAC, coolers | Process cooling | Refinery air coolers (API 661) | Marine, coastal |
Air-Cooled Heat Exchangers (ACHE): Refinery and petrochemical fin-fan coolers built to API 661 — G-type embedded fins are the specification standard.
HVAC & Refrigeration: Condenser and evaporator coils for air conditioning, cold rooms, and supermarket refrigeration — typically 3/8″ to 5/8″ tubes at 10–12 FPI.
Power Generation: Steam condensers, dry cooling towers, generator air coolers, and waste-heat recovery economizers.
Automotive & Transport: Radiators, charge-air coolers, oil coolers, and EV battery thermal management systems.
Industrial Process Cooling: Compressor intercoolers/aftercoolers, hydraulic oil coolers, and machine cooling circuits.
Marine Systems: Engine-room coolers and HVAC on vessels — extruded fins on 5083 base tubes resist salt-laden air. Pairs with our aluminium coiled tubes for refrigeration circuits.
Aluminum’s thermal conductivity of 205–237 W/m·K (alloy dependent) is roughly 4x carbon steel (50 W/m·K), while weighing one-third as much. Compared to copper fins (385 W/m·K), aluminum delivers ~85% of the thermal performance at ~30% of the material cost and 30% of the weight — which is why aluminum fins dominate everything except the most compact or corrosive-duty designs.
Honest guidance: skip finning when your fluid-to-fluid exchanger has liquids on both sides — bare tubes transfer fine there and fins add cost for nothing. In heavily fouling airstreams (cement dust, lint, flour), fins clog; use low-fin (7 FPI) designs or bare tube banks with soot blowers instead. And in acidic flue gas below dew point, aluminum fins corrode — specify carbon steel G-fin with coating or stainless instead.
Finned aluminum tubes are used in air-cooled heat exchangers, HVAC condensers and evaporators, radiators, oil coolers, and refinery fin-fan coolers. The fins multiply air-side surface area 10–20x, letting air-cooled equipment match water-cooled performance.
Fins increase external surface area 10–20x depending on fin height and density. Overall heat exchanger duty typically improves 3–8x versus bare tube in air-cooling service, since air-side resistance dominates the thermal circuit.
L-type fins are tension-wrapped (to 150°C, most economical). KL adds knurling for better grip (to 260°C). G-type embeds the fin in a machined groove (to 400°C, API 661 standard) for refinery and power service.
FPI means fins per inch — the fin density along the tube. HVAC coils typically use 10–12 FPI for maximum surface; dusty industrial environments use 7–8 FPI so passages resist clogging and clean easily.
Aluminum base (6061/3003) for lightweight all-aluminum coils; copper base for refrigerant systems with brazed joints; carbon steel for high-pressure process duty; 5083 or extruded-fin construction for marine and coastal atmospheres.
For corrosion and thermal cycling, yes — the extruded fin is integral with its muff, fully covering the base tube with zero contact resistance. They cost 40–60% more than L-type, justified in marine, coastal, and long-life installations.
Yes. G-type embedded fin tubes for air-cooled heat exchangers are supplied to API 661 requirements, including fin bond integrity testing and full material traceability with 3.1 certification.
For comfort HVAC condensers: 3/8″–1/2″ tubes, 10–12 FPI, 9.5mm fin height. For dusty rooftop or industrial units, drop to 8 FPI. Send your duty (kW, air flow, temperatures) and we’ll size it.
Standard tests: dimensional inspection, fin pull-off bond test, and eddy current or hydrostatic test on the base tube. Thermal cycle testing and third-party witness (SGS/BV/TUV) available on request.
Standard L-type configurations: 2–3 weeks with low MOQ suitable for coil repair shops. Custom G-type/extruded programs: 4–6 weeks, MOQ typically 100–300 metres. Send drawings for confirmation.
Send us your base tube size and material, fin type, FPI, fin height, length, and quantity — or simply your thermal duty — and our team responds with pricing and lead time within 24 hours.
📞 Call/WhatsApp: +91 95166 18000
📧 Email: support@aluminiumtubes.org
+91 95166 18000
support@aluminiumtubes.org