ASTM A179 L-Type Finned Tube with AL1060 Fins For Heat Exchangers
and Boilers
An L-Type finned tube is a type of heat exchanger component used to
enhance heat transfer between fluids (liquids or gases) in
industrial applications, such as power plants, petrochemical
facilities, HVAC systems, refrigeration, and more. The key feature
of an L-Type finned tube is its unique fin attachment method, which
forms durable and effective fins around the outer tube surface.
The ASTM A179 L-Type finned tube with AL1060 fins is a specialized
heat exchanger component designed for efficient heat transfer in
various industrial applications. Here’s a breakdown of its key
features and applications:
Key Features:
1. Base Tube (ASTM A179):
Chemical Composition of ASTM A179 (Weight %)
| Element | Composition (Max %) |
| Carbon (C) | 0.06 – 0.18 |
| Manganese (Mn) | 0.27 – 0.63 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Silicon (Si) | ≥ 0.10 (no explicit max, typically 0.25-0.35) |
| Iron (Fe) | Balance |
Note: ASTM A179 is a low-carbon steel with no significant alloying
elements, making it highly weldable and suitable for heat
exchangers.
Mechanical Properties of ASTM A179
| Property | Value |
| Tensile Strength | ≥ 325 MPa (47,000 psi) |
| Yield Strength | ≥ 180 MPa (26,000 psi) |
| Elongation (in 2" or 50mm) | ≥ 35% |
| Hardness (Rockwell B) | ~ 72 HRB (typical) |
| Thermal Conductivity | ~ 51.9 W/m·K (at 100°C) |
Key Notes:
Cold-drawn seamless tubes ensure high dimensional accuracy and
smooth surfaces.
Excellent ductility and formability due to low carbon content.
Suitable for moderate-pressure and high-temperature applications
(e.g., boilers, condensers).
2. Fins:
- Material: AL1060 (99.6% pure aluminum).
- Fin Type: L-Type (Embedded Fin) – The aluminum fin strip is wound
into a machined groove on the tube and mechanically bonded for
secure attachment.
- Fin Height & Density: Customizable (e.g., 5-16 mm height, 5-11 fins
per inch).
Comparison with Common Fin Tube Materials
| Property | ASTM A179 (Base Tube) | AL1060 (Fins) |
| Main Composition | Low-carbon steel | 99.6% Aluminum |
| Thermal Conductivity | Moderate (~52 W/m·K) | Very High (~230 W/m·K) |
| Corrosion Resistance | Moderate (needs coating in harsh environments) | Excellent (naturally oxidation-resistant) |
| Typical Use | High-pressure fluid handling | Heat dissipation (fins) |
Why This Matters for L-Type Finned Tubes?
- The A179 tube provides structural strength for pressurized systems.
- AL1060 fins maximize heat transfer while resisting corrosion.
- The L-Type (embedded) design ensures a durable bond between the two
materials.
3. Key Features
✔ High Heat Transfer Efficiency – Aluminum fins (AL1060) enhance thermal conductivity.
✔ Strong Mechanical Bonding – L-Type fins resist loosening under thermal cycling.
✔ Corrosion Resistance – AL1060 provides excellent oxidation resistance in moist/outdoor
environments.
✔ Lightweight & Cost-Effective – Aluminum fins reduce weight compared to stainless steel options.
Main Applications of ASTM A179 L-Type Finned Tube with AL1060 Fins
:
1. Heat Exchangers & Condensers:
Used in power plants, refineries, and chemical processing for steam
condensation, gas cooling, and heat recovery.
2. HVAC & Refrigeration Systems:
Enhances heat transfer in air coolers, chillers, and evaporators
due to the high thermal efficiency of AL1060 fins.
3. Industrial Boilers & Economizers:
Improves heat exchange efficiency in waste heat recovery systems
and boiler exhaust gas applications.
4. Oil & Gas Industry:
Used in gas coolers, compressors, and LNG heat exchangers where
corrosion resistance and thermal performance are critical.
5. Marine & Offshore Applications:
Resistant to saltwater corrosion, making it suitable for shipboard
condensers and desalination plants.
