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.

Product Features

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.

Typical Applications

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

Size Range

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

Chemical Composition of ASME SA179 Base Tube

Element	Composition (%)
Carbon (C)	0.06 - 0.18
Manganese (Mn)	0.27 – 0.63
Phosphorus (P)	≤ 0.035
Sulfur (S)	≤ 0.035

Mechanical Properties of ASME SA179 Base Tube

Property	Requirement
Tensile Strength	≥ 325 MPa
Yield Strength	≥ 180 MPa
Elongation	≥ 35%

Tags:

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

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Heat Exchanger Tube

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Super Duplex Stainless Steel Heat Exchanger Tube

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Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

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Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

products details

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube