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Lord Fin Tube-Aluminum L-Foot Finned Tubes

L-Foot Finned Tube is highly efficient yet cost effective,L-footed finned tubing offers maximum heat transfer at lower temperatures. The unique L-shaped design holds fins rigidly to withstand heat cycling and high velocity air vibration.

The L-Foot Finned Tube can also be offered in following variations to the Fin:

Knurled Fin, Double Overlap Fin, Perforated Fin

Aluminum L-Foot Finned Tubes consist of thin aluminum fin strip tightly wound helically around the tube circumference. An L-shaped foot, 1/16″ wide, is first formed on one side of the fin strip (hence the name L-Foot). The strip is then wound tightly around the tube, with the foot bearing on the tube outer surface. A typical fin spacing is 10 fins per inch of tube length — this can be varied. Tension in the fin strip as it is wrapped around the tube serves to seat the fin foot forcefully on the tube, and to hold the fin firmly in place.

The following table shows common Aluminum L-Foot Finned Tube configurations:

Tube OD 5/8”, 3/4”, 1”, 1-1/4” and 1-1/2″

Fin Height 3/8″, 7/16”, 1/2” and 5/8″

Fin Type Solid or Perforated

Fin Thickness 0.014” to 0.016″

Number of fins 8 to 12 fin per inch

Fin Material Aluminum 1100-0 or Aluminum 5005

Tube Material Generally carbon steel, stainless steel, or brass — can be any material

Tube Length No practical limit

L fin tubes

The aluminum fin strip or the copper fin strip is folded into an L shape and spirally wound tightly under the action of tension on the outer surface of the base tube. Tension in the fin strip is wrapped around the tube serves to make the fin foot forcefully on the tube, thus hold the fin firmly in place.

L Finned Tube is combined with two different materials

Core Tube: Carbon steel, stainless steel, copper

Fins: Aluminum, copper, steel


1. Adopting winding process, high production efficiency

2. Uniform fin pitch, good heat transfer performance

3. Core tube is protected from air corrosion by base of fin

Maximum Working Temperature: 230°C


1. Air cooler in petrochemical, power plant, paper-making, tobacco and building heating.

2. Air heater in food processing equipment

3. Air heater in plant protein and starch spay drying system