Knurled Finned Tubes Suppliers in China
What is Knurled Finned Tubes?
KL Fin Tubes also called knurled finned tubes. The fin is wrapped around the tube and the foot is rolled into the outer surface of the pre knurled tube and secured at each end. Gives good surface protection to the tube and improved heat transfer compared to the L or LL type fin. This finned tube is used for moderate temperature cooling applications.
Knurled finned tubes are basically identical to the Wrap-On fin and produced with a combination of Wrap-On and Embedded. The fins are manufactured from strip which is preformed into an accurately controlled L shape similar to the L type, rolled into a taper which causes it to knurled. Then continuously helically wound under tension onto the tube. The fin wrapped around the tube. The base tube is knurled by a rotating tool, then the foot of the fin is knurled into the base tube, which provide a tight bond with increased thermal performance. Providing the correct fin strip is used the foot of one fin butts up against the next fin and there is no gap between the fins. This gives some corrosion protection to the tube. The fins are secured at each end to prevent unwinding in a similar way as L fins.
The fin is wrapped around the tube and the foot is rolled into the outer surface of the pre knurled tube and secured at each end. Gives good surface protection to the tube and improved heat transfer compared to the L or LL type fin tube. KL -Foot tension wound finned tubes are commonly used in applications with metal Maximum Operating Temperature- up to 320°C (608°F)
Quality Control for KL type fin tube
The quality of the KL type fin 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 KL type fin tube.
Knurled Finned Tubes materials:
Tube Material: Any material available, such as Carbon Steel/ Carbon Alloy Steel/Stainless Steel/ Nickel Alloys/ Copper/Copper Alloys/Titanium, A179, A192, A210, stainless tube A269/A213 T5 T11 T22 304 316/316L
Knurled Finned Tube Fin Material : Aluminium or Copper.
Knurled Finned Tubes 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 | Aluminum | ≤ 18Mtrs | ||
KL-Foot Tension Wound Finned Tubes Material
The base tube is made of Carbon Steel Tube(A106 Gr.B, A179, A192),the aluminum fins
The base tube is made of stainless steel tube(TP304, 316, 321, 347),the aluminum fins
KL-Foot tension wound finned tube,the base tube is made of copper tube,the aluminum fins
KL type finned tube,the base tube is made of copper tube,the copper fins
KL Type Finned Tube By Industy
KL Type Finned Tube is usually used in condensers and heat exchangers with a maximum operating temperature of 250°C and a maximum operating pressure of 3.2MPa.
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. High heat transfer performance: KL-type finned tubes significantly improve heat transfer performance through knurling and winding processes.
2. Strong corrosion resistance: KL type fin tube has good resistance to atmospheric corrosion and can remain stable in long-term use.
3. Tight structure: The fins and the base tube are very tightly combined, fit firmly, and are not easy to deform or fall off.
4. Wide scope of application: suitable for various industrial and civil fields, such as heating radiators, air heaters for material drying, etc.
5. Operating temperature and pressure limitations: The operating temperature of KL type fin tube generally does not exceed 250°C, and the operating pressure does not exceed 3.2MPa.
Customizable KL 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.
KL 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
KL-Foot Tension Wound Finned Tubes Quality Checks
Each of our spiral knurled finned 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 KL Type Fin Tube Application
The core of the knurled fin tube radiator is that its fins are made using the knurling process. This design not only increases the heat dissipation area, but also allows the heat to be quickly transferred from the tube to the fins through the close combination of the fins and the tube body, and then dissipated into the air through the fins. In addition, the knurling design allows the air to form vortices between the fins, increasing the contact area between the air and the fins, thereby improving the heat dissipation effect.
The application of KL type finned tubes in dryers has significant advantages and applicability. KL type fin tube, also called knurled fin tube, winds the fins by knurling the base tube and installing blades on the winding machine, so that the contact area between the fins and the tube is large and the fit is tight, improving the heat transfer performance. High, low thermal contact resistance, this design makes the KL type fin tube perform well in dryers. Especially in the fields of food processing, chemical production and pharmaceutical manufacturing。
KL finned tubes are widely used in various heat exchange equipment, including air conditioning units, refrigeration and cooling machines, induced air conditioners, textile printing and dyeing machinery, forestry, chemical industry, national defense, medicine, food, starch, beer, kerosene and construction industries. These application areas cover many aspects from industrial production to daily life, showing the wide applicability of KL finned tubes.
The advantages of KL type finned tube for air cooled heat exchanger are mainly reflected in their structural characteristics, heat transfer efficiency, corrosion resistance and application range.
Related Product
KL Type Fin Tube FAQs
A: KL type fin tube production line 12.
A: We can provide knurled finned tube samples for free.
A: After you confirm KLM 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: KL-Foot tension wound 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.