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KL Type Fin Tube Stainless steel Knurled L Footed Finned Tube For Heat Exchanger

    Buy cheap KL Type Fin Tube Stainless steel Knurled L Footed Finned Tube For Heat Exchanger from wholesalers
     
    Buy cheap KL Type Fin Tube Stainless steel Knurled L Footed Finned Tube For Heat Exchanger from wholesalers
    • Buy cheap KL Type Fin Tube Stainless steel Knurled L Footed Finned Tube For Heat Exchanger from wholesalers
    • Buy cheap KL Type Fin Tube Stainless steel Knurled L Footed Finned Tube For Heat Exchanger from wholesalers
    • Buy cheap KL Type Fin Tube Stainless steel Knurled L Footed Finned Tube For Heat Exchanger from wholesalers
    • Buy cheap KL Type Fin Tube Stainless steel Knurled L Footed Finned Tube For Heat Exchanger from wholesalers
    • Buy cheap KL Type Fin Tube Stainless steel Knurled L Footed Finned Tube For Heat Exchanger from wholesalers

    KL Type Fin Tube Stainless steel Knurled L Footed Finned Tube For Heat Exchanger

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    Brand Name : TORICH
    Model Number : KL Type Fin Tube
    Certification : ISO9001, ISO14001, TS16949
    Price : 800-1000 USD/Tons
    Payment Terms : L/C, D/A, D/P, T/T, Western Union, MoneyGram
    Supply Ability : 60000 Ton/Tons per Year
    Delivery Time : 20-30days upon products
    • Product Details
    • Company Profile

    KL Type Fin Tube Stainless steel Knurled L Footed Finned Tube For Heat Exchanger

    KL-Type (Knurled L-Footed) Stainless Steel Finned Tube for Heat Exchangers

    Material

    A KL-type finned tube (Knurled L-Foot fin tube) is a heat-exchanger tube made by helically wrapping a metal fin strip around a stainless-steel base tube. Before wrapping, the tube surface is knurled, and the L-shaped fin foot is mechanically embedded into this knurled surface. This creates a tight metallurgical/mechanical bond, producing enhanced heat-transfer efficiency, strong fin adhesion, and robust durability.

    Specifications

    Typical ranges from industrial KL-type fin tube manufacturing:

    • Base tube material: Stainless steel (e.g., 304, 304L, 316, 316L, 321)

    • Tube OD: 12.7 mm (1/2″) to 50.8 mm (2″)

    • Tube wall thickness: ≥ 1.24 mm (0.049″), depending on size

    • Fin material: Aluminum or copper strip

    • Fin thickness: 0.30–0.50 mm

    • Fin height: 6.35 mm (1/4″) to 25.4 mm (1″)

    • Fin pitch: 5–12 fins per inch

    Main Characteristics

    • High thermal efficiency – Strong fin-to-tube bonding increases heat conduction and reduces thermal resistance.

    • Strong mechanical engagement – Knurled bonding prevents fin loosening under vibration and temperature cycling.

    • Corrosion-resistant performance – Stainless steel base tube provides long service life, especially in corrosive or humid atmospheres.

    • Durable and stable – Suitable for high-stress industrial environments.

    • Flexible material combinations – Stainless-steel tubes with aluminum, copper, or stainless fins.

    • Customizable geometry – OD, wall thickness, fin height, fin pitch, and materials can be tailored to application needs.

    Our Advantages

    After researching typical buyer concerns for fin-tube heat exchangers, the following advantages address the most common requirements:

    • Optimized thermal performance: Customers often worry about insufficient heat-transfer efficiency.
      KL-type knurled bonding provides superior thermal contact, resulting in higher heat-exchange performance than standard L or LL fin tubes.

    • Reliable long-term bonding: Many clients ask about fin loosening over time.
      The mechanical embedding of the L-foot into the knurled tube ensures stable bonding even under severe cycling.

    • Corrosion protection: Users working with corrosive air, moisture, or industrial gases require corrosion-resistant tubes.
      Stainless steel base tubes ensure long-term resistance to corrosion, extending the service life of the exchanger.

    • Design flexibility for custom systems: Engineers frequently need tailored dimensions to match coil or exchanger design.
      We support full customization of tube OD, wall thickness, fin type, fin pitch, and length.

    • Optional surface treatments:
      We can provide copper plating, zinc plating, or color-zinc plating on the base tube surface where additional corrosion resistance or thermal requirements are needed.

    Chemical Composition

    GradeC (%)Cr (%)Ni (%)Mo (%)Mn (%)Si (%)Others
    304 / S30400≤0.0818–208–10.5–≤2.0≤1.0P ≤0.045, S ≤0.03
    304L / S30403≤0.0318–208–12–≤2.0≤1.0P ≤0.045, S ≤0.03
    316 / S31600≤0.0816–1810–142–3≤2.0≤1.0P ≤0.045, S ≤0.03
    316L / S31603≤0.0316–1810–152–3≤2.0≤1.0P ≤0.045, S ≤0.03
    321 / S32100≤0.0817–199–12–≤2.0≤1.0Ti stabilized

    Mechanical Properties

    GradeTensile Strength (MPa)Yield Strength (MPa)Elongation (%)
    304515–735~205≥40
    304L485–690~170≥40
    316515–690~205≥40
    316L485–655~170≥40
    321515–720~205≥40

    Applicable Standards

    KL-type finning is a manufacturing method, so the standards apply mainly to the base tube materials:

    • ASTM A213 – Seamless ferritic and austenitic heat-exchanger tubes

    • ASTM A269 – Austenitic stainless-steel seamless/welded tubing

    • ASTM A312 – Seamless/welded stainless-steel pipes and tubes

    • EN 10216 / EN 10217 – European seamless/welded stainless-steel tubes

    • JIS G3463 – Stainless steel boiler and heat-exchanger tubes

    • GB/T 13296 – Chinese seamless stainless-steel boiler and heat-exchanger tubes

    Application Fields

    KL-type stainless-steel fin tubes are widely used in:

    • Industrial heat exchangers

    • Air-coolers and condensers

    • Petrochemical processing

    • Power plant heat-recovery systems

    • HVAC coils, evaporators, and condensers

    • Boiler economizers and flue-gas coolers

    Typical Use Inside These Fields

    • Air Cooling Units: Exchange heat between process fluids and ambient air

    • Condensers: Improve condensation efficiency of steam or refrigerants

    • Heat-Recovery Systems: Recover waste heat from flue gases

    • Chemical Processing: Resist corrosion in aggressive environments

    • HVAC Industry: Provide compact, high-efficiency coil construction




    Q: Are you trading company or manufacturer ?

    A: manufacturer,also can do trading.

    Q: How long is your delivery time?

    A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.

    Q: Do you provide samples? is it free or extra ?

    A: Yes, we could offer the sample for free charge but need pay the cost of freight.

    Q: What is your terms of payment ?

    A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

    If you have another question, pls feel free to contact with me.

    Quality KL Type Fin Tube Stainless steel Knurled L Footed Finned Tube For Heat Exchanger for sale

    KL Type Fin Tube Stainless steel Knurled L Footed Finned Tube For Heat Exchanger

    Company Info.
    TORICH INTERNATIONAL LIMITED
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