Overview of fin tube classification and its application

I. Classification by manufacturing process
1. Integral fin tube
Cast fin tube: The base tube and fin are integrated through the casting process, which is common in cast iron and cast steel materials

Machinery fin tube: Fins are directly machined on the metal tube by turning or milling

Rolled fin tube: Fin structure is formed on the surface of the metal tube through a special rolling process

2. Composite fin tube
Inlaid fin tube: The prefabricated fin is mechanically fixed to the base tube

Wrapped fin tube: The metal strip is spirally wound and welded to the base tube

Set fin tube: The pre-processed fin is put on the base tube and then fixed by the expansion process

3. Welded fin tube
High-frequency welded fin tube: The fin and base tube are welded by high-frequency welding process

Brazed fin tube: The fin and base tube are connected at high temperature using brazing materials

II. Classification by fin shape
1. Longitudinal finned tube
The fins are arranged along the axial direction of the tube, which is suitable for heat exchange occasions where the gas flows horizontally, and the pressure drop is small.

2. Transverse finned tube
Spiral finned tube: The fins are spirally wrapped around the tube body to enhance fluid turbulence

Annular finned tube: The fins are parallel arranged rings, which are simple to manufacture

Corrugated finned tube: The fins are wavy, which further enhances heat transfer

3. Special shape fins
Needle finned tube: The fins are needle-shaped protrusions, which greatly increase the surface area

Plate finned tube: The fins are flat, often used in air coolers

Special shaped finned tube: Specially designed fins such as serrated and slotted

III. Classification by material
1. Metal finned tube
Copper and copper alloy finned tubes: Excellent thermal conductivity and corrosion resistance

Aluminum and aluminum alloy finned tubes: Lightweight and low cost

Carbon steel finned tubes: High strength, suitable for high pressure and high temperature

Stainless steel finned tubes: Strong corrosion resistance, used in special environments

2. Non-metallic fin tubes
Plastic fin tubes: corrosion resistant, low cost, but poor temperature resistance
Ceramic fin tubes: resistant to high temperature corrosion, but brittle
3. Composite material fin tubes
Bimetallic fin tubes: such as aluminum fin steel base tubes, taking into account both performance and cost
Coated fin tubes: special surface treatment to improve corrosion resistance or heat transfer performance
IV. Classification by application field
1. Fin tubes for the power industry
Mainly used in power plant boilers, air preheaters, etc., mostly using high-frequency welded spiral fin tubes.
2. Fin tubes for petrochemical industry
Applied to various heat exchangers, heating furnaces, etc., corrosion resistance and high temperature resistance need to be considered.
3. Fin tubes in HVAC field
Common copper tube aluminum fin heat exchangers in air conditioning and refrigeration systems.
4. Other industrial applications
Including fin tubes with special requirements in industries such as food, pharmaceuticals, and ships.