Wound Finned Tube

Wound Finned Tube is a heat exchange element formed by spirally winding a metal strip on the surface of a base tube. It is widely used in the field of industrial heat exchange. Its core principle is to greatly increase the heat dissipation area through fins and improve the heat transfer efficiency.‌

Wound Finned Tube Manufacturers and Supplier China OEM Factory

🔧 I. Wound Finned Tube Structure & Working Principle

  1. Basic Structure

    • Base Tube‌: Typically made of seamless steel, stainless steel, or copper pipes, responsible for transporting thermal media (steam/hot water/thermal oil).
    • Fins‌: Steel, aluminum, or copper strips tightly wound spirally onto the base tube via cold winding, forming a continuous helical heat dissipation surface.
    • Process Characteristics‌: Cold winding occurs at ambient temperature, achieving tight bonding between fins and the base tube through mechanical interlocking force, minimizing contact thermal resistance.
  2. Heat Transfer Mechanism

    • Heat from thermal media flowing inside the base tube conducts through the tube wall to the fins;
    • Fins significantly expand the heat dissipation area (3-10 times larger than bare tubes), enabling efficient heat dissipation via convection with air;
    • The spiral structure disrupts airflow, breaks the boundary layer, and enhances turbulent heat transfer.

⚙️ II. Wound Finned Tube Core Advantages

Feature Technical Advantage Application Value
Heat Exchange Efficiency Finned area expanded by 5-10 times, conduction efficiency increased by over 3 times Rapid cooling/heating, reduced energy consumption
Structural Design Compact layout, larger heat exchange area per unit volume Saves installation space, adapts to confined sites
Durability Cold winding preserves material strength; galvanized/stainless steel resists corrosion Service life exceeds 30 years, low maintenance cost
Adaptability Suitable for -50℃ to 300℃ conditions, resistant to dust and corrosive gases Stable operation in harsh environments (chemical, power industries)

Spiral wound finned tube

🏭 III. Wound Finned Tube Typical Application Scenarios

  1. Industrial Heat Exchange Systems

    • Chemical/Power‌: Reactor cooling, waste heat recovery from boiler flue gas (e.g., saving 8000 tons of coal annually in a 1000MW unit).
    • Metallurgy‌: Roller cooling, blast furnace/air heater heat exchange, withstands 800℃.
  2. Heating & Drying Equipment

    • Workshop Heating‌: Large-diameter (DN76) wound finned tubes achieve uniform workshop heating via natural convection;
    • Agricultural Product Drying‌: Uniform heat dissipation prevents uneven heating and product deterioration.
  3. Environmental Protection & Energy Recovery

    • Waste Gas Treatment‌: Galvanized finned tubes resist acid mist corrosion, used in chemical waste gas purification towers;
    • Cold Storage Systems‌: Serve as core components (evaporators/condensers), enhancing refrigeration efficiency.

🛠️ IV. Wound Finned Tube Technical Limitations & Improvement Directions

  1. Existing Shortcomings

    • Sensitivity to Media Flow Rate‌: Efficiency drops with low flow velocity; high velocity causes vibration and wear;
    • Cleaning Difficulty‌: Dense fins prone to dust accumulation, requiring specialized cleaning equipment;
    • Process Limitations‌: Fin height typically ≤15mm, finning ratio lower than rolled fins (Al: 13-15 vs. Cold-wound steel: 5-7).
  2. Optimization Trends

    • Material Upgrade‌: Developing high-thermal-conductivity alloy coatings to enhance corrosion resistance;
    • Structural Innovation‌: CFD simulation optimizing fin pitch/height, aiming for 15% efficiency increase.

💎 V. Wound Finned Tube Selection Recommendations

Priority scenarios:

  • High-Temperature & High-Pressure Environments‌: Choose steel base tube + cold-wound steel fins (strong pressure bearing capacity);
  • Highly Corrosive Conditions‌: Galvanized finned tubes or stainless steel base tubes;
  • Space-Constrained Scenarios‌: Compact spiral design (e.g., 3-inch tube surface area = 8x bare tube).