Spiral L Form Fin Tube Suppliers in China
L-foot finned tube also called Wrap-On Finned Tube or L-type tension wound finned tube, which used in applications where temperatures lower than 300℃. In other words L fin tubes mainly used in low-temperature application where some degree of tube wall protection is needed. L-Foot tension wound fin tubes consist of two parts, aluminum fin and base tube. The thin aluminum fin strips tightly wound helical around the base tube circumference. A foot is first formed at one side of the fin strip (Called the name L foot). The strip is then wound tightly around the tube, with the foot bearing on the tubes outer surface. These short horizontal limb of each L are in full contact with the base-tube surface to cover it completely. While Tension in the fin strip as it is wrapped around the tubes serves as seat the fin foot forcefully on the tube, and then to hold the fin firmly in place. L-footed finned tubing offer maximum heat transfer at lower temperatures circumference. The unique L-shaped design holds fins rigidly to withstand heat cycling and high velocity air vibration. These fins offer a certain degree of atmospheric protection of the tube wall anti corrosion. The broad contact surface between the tube and the fining enhances heat transfer. This fin design is highly efficient and cost effective.
The ends of the fins have to be stapled to prohibit the aluminum fin from unravelling or loosing the contact between the fin foot and the base tube. This contact is critical to the operation of the air coolers, since the heat is transferred from the tube wall, through the fin, to the surrounding hot air.
Quality Control for L type fin tube
The quality of the L-foot finned tube is assured by hydrostatic or pneumatic testing, eddy current testing and tensile testing to verify the mechanical bond between the inner tube and the outer fins.
Delivery condition:
Tube ends are square cut, free burrs, internally dried and air blown clean, externally coated with Anti-rust at both ends of L type fin tube.
L type fin tube typical size:
| Base Tube O.D (mm) | Base Tube
Thickness (mm) |
Fin Height (mm) | Fin Thickness (mm) | Fin Pitch (mm) |
| 15.88 mm ~50.8 mm | 1.0 mm ~3.0 mm | 6.35 mm ~ 25.4 mm | 0.3 mm ~0.5 mm | 2.1 mm ~ 6.0 mm |
| Base Tube Material | Fin Material | Tube Length (Mtr) | ||
| Carbon Steel ,Alloy Steel ,Stainless Steel, Copper Alloy | Aluminum, Copper | ≤ 18Mtrs | ||
L Type Fin Tube Material
The base tube is made of Carbon Steel Tube(A106 Gr.B, A179, A192),the fins aluminum
The base tube is made of stainless steel tube(TP304, 316, 321, 347),the fins aluminum
Wrap around fin tube,The base tube is made of copper tube,the fins aluminum
Wrap around fin tube,The base tube is made of copper tube,the fins copper
Spiral L Form Fin Tube By Industy
L type fin tubes are widely used in various industrial fields, especially in the petroleum, chemical, electric power and metallurgical industries. Its excellent corrosion resistance and high strength make it perform well in waste heat recovery, boiler energy-saving transformation and air preheating systems. In addition, L-type fin tubes are also widely used in the field of green energy, such as solar thermal collection systems, geothermal energy utilization, and industrial waste heat power generation projects.
Top Features of L Type Fin Tube
Datang offers the widest variety of sizes available for spiral L type fin tube in the industry.Its heat exchange efficiency can reach several times or even dozens of times that of ordinary heat exchangers.
1. Suitable for using in low-temperature application
2. L type fin tube is the most cost effective way compared to the others.
3. The failed fins could easily removed during production and bare tubes can be used again for fining.
4. There is no need to make a helical groove over the core tube.
5. Spiral L form fin tube is possible to place the fins on a super thin-walled tube with is particularly desirable when using expensive alloys as core tubes.
6. The L-foot finned tube can withstand a temperature of up to 130°C without the risk of atmospheric corrosion or thermal stress.
Customizable L Type Fin Tube
We can customize the material, specification and length according to your requirements.Solve your problems anytime and anywhere. Customize fin tubes and equipment according to your needs. Provide free technical guidance. Welcome to customize with drawings, so that you can purchase without worries.
Differences Between L KL LL Type Finned Tubes
L type wound fin tube: maximum operating temperature is 150°C.
LL type wound fin tube: maximum operating temperature is 170°C.
KL type wound fin tube: maximum operating temperature is 250°C.
L Type Fin Tube Package
Payment Terms:T/T, LC
Delivery: 15-30 days after payment
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Iron frame packing boxes and the desiccants are put into each package for continental transportation as well. or as required
Spiral L Form Fin Tube Quality Checks
Each of our spiral L type fin tube is subjected to stringent quality checks.Inspection and Tests Performed:
1.Chemical Composition inspection。
2.Mechanical Properties Test(Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Hardness, Impact Test).
3.Surface and Dimension Test.
4.No-destructive Test.
5.Hydrostatic Test.
Spiral L Type Fin Tube Application
The application of spiral L form fin tubes in drying equipment is mainly reflected in its characteristics of efficient heat exchange and optimized air flow distribution. The L foot fin tube significantly improves the heat exchange efficiency and work efficiency of the drying equipment by increasing the heat dissipation area and optimizing the air flow distribution.
Power plant air coolers require efficient and stable heat dissipation equipment to ensure the normal operation of generators and motors. The efficient heat transfer and low air resistance characteristics of L-type fin tubes make them ideal heat dissipation elements. In addition, the excellent performance of L-type fin tubes in high temperature and high humidity environments also makes them particularly suitable for the needs of power plants.
In power plants, L type fin tubes are often used in condensers and evaporators of cooling systems. By optimizing heat transfer efficiency and reducing equipment size, L foot finned tubes significantly improve the energy efficiency and operational stability of power plants. In addition, its corrosion resistance and high strength properties also allow it to perform well in harsh environments and extend the service life of equipment.
The application of surrounding Wrap around L foot finned tube in oil coolers is mainly reflected in its efficient heat transfer performance and structural features. Surrounding L type fin tubes perform well in oil coolers by increasing the outer surface area of the heat exchange tubes, significantly improving heat transfer efficiency.
Related Product
L Type Fin Tube FAQs
A: L type fin tube production line 12.
A: We can provide L type fin tube samples for free.
A: After you confirm Hspiral L form fin tube sample details, the samples will be ready for delivery in 3-7days,and will be sent to you via express and arrive in 3-5days.
A: wrap around L foot finned tube can be customized, we can make the new thermoforming or extruding mode based on your drawings and we can sign a confidentiality agreement about your patented product, pls contact us for any further information.
A: Always a pre-production sample,before mass production;always final inspection before shipment.
Inspection & Guarantee Certificate is supplied with shipment, and the Third Party Inspection is available.