ASME SA179 Wound L Type Finned Tubes for Air Coolers
ASME SA179 Wound L Type Finned Tubes are designed to maximize heat transfer efficiency in air-cooled heat exchangers operating under moderate temperature conditions. These finned tubes combine seamless ASME SA179 low-carbon steel base tubes with high-conductivity AL1060 aluminum fin strips, which are mechanically wound onto the tube surface using the L Type finning process.
During production, the aluminum strip is first formed into an "L" profile before being helically wound under controlled tension around the outside diameter of the base tube. The foot of each fin completely covers the tube surface, creating continuous metal-to-metal contact while protecting the base tube from direct atmospheric exposure. The result is a lightweight, economical heat transfer component with reliable thermal performance and excellent corrosion resistance in outdoor service.
Wound L Type finned tubes are widely selected for air coolers because they provide an effective balance of thermal efficiency, manufacturing economy, and long-term operational reliability.
- Manufactured with seamless ASME SA179 carbon steel tubes.
- Mechanically wound L Type aluminum fins for dependable heat transfer.
- AL1060 aluminum fins with excellent thermal conductivity.
- Complete fin foot coverage protects the base tube surface.
- Low air-side pressure drop with increased external surface area.
- Suitable for continuous service at moderate operating temperatures.
- Uniform fin spacing for consistent thermal performance.
- Available in customized dimensions and fin configurations.
ASME SA179 Wound L Type Finned Tubes are commonly used in:
- Air coolers
- Air-cooled heat exchangers
- Petrochemical plants
- Oil and gas processing facilities
- Refineries
- Power generation plants
- Natural gas compression systems
- Industrial cooling equipment
- HVAC heat recovery systems
- Chemical processing plants
| Item | Standard Range |
|---|---|
| Base Tube Outside Diameter | 12.7 mm – 50.8 mm (1/2" – 2") |
| Base Tube Wall Thickness | 1.2 mm – 4.0 mm |
| Tube Length | Up to 18,000 mm |
| Fin Material | AL1060 Aluminum |
| Fin Thickness | 0.25 mm – 0.50 mm |
| Fin Height | 7 mm – 16 mm |
| Fin Density | 8 – 13 FPI (custom configurations available) |
| Finished Tube Outside Diameter | According to fin dimensions |
| Bare Tube End Length | As specified by customer |
| Element | Composition (%) |
| Carbon (C) | 0.06 - 0.18 |
| Manganese (Mn) | 0.27 – 0.63 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Property | Requirement |
| Tensile Strength | ≥ 325 MPa |
| Yield Strength | ≥ 180 MPa |
| Elongation | ≥ 35% |
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