Dual-metal fin tube

Bimetallic fin tube

Finned Tube Overview
Finned tubes, designed to enhance heat exchange efficiency, typically increase the surface area (either external or internal) of the heat exchange tubes by adding fins, thereby improving the heat exchange efficiency. Such heat exchange tubes, as heat exchange elements, operate under harsh conditions of high-temperature flue gases for extended periods, such as in boiler heat exchangers where the fins are exposed to severe environments of high temperature, pressure, and corrosive atmospheres, necessitating high-performance specifications for the finned tubes.
1. Corrosion resistance
2. Abrasion resistance
3. Low contact thermal resistance
4. High stability
5. Dust-Proofing Capability

Finned tube classification
Finned tubes come in a variety of types and new varieties are continuously emerging. Finned tubes can generally be categorized into several aspects of application:
Categorized by processing technology: 1. Strip Tube (Sleeve Tube); 2. Tension Wound Finned Tube; 3. Inserted Fin Tube; 4. Seamless Finned Tube; 5. Cast Finned Tube; 6. Welded Finned Tube, which includes: High-Frequency Welded Finned Tube, Submerged Arc Welded Finned Tube, etc.
Categorized by fin shape: 1. Square, rectangular, and circular fin tubes; 2. Spiral fin tubes; 3. Wavy fin tubes; 4. serrated fin tubes; 5. Needle fin tubes; 6. Vertical fin tubes; 7. Solid plate fin tubes (plate fins) and more.
Material Classification: 1. Copper, Al, Cu/Al finned tubes; 2. Carbon steel, stainless steel, carbon steel/stainless steel finned tubes; 3. Cast iron (cast steel) finned tubes, etc.
Categorized by application: Air conditioning finned tubes; Air-cooled finned tubes; Boiler finned tubes for water walls, economizers, and air preheaters; Finned tubes for various kilns and industrial furnaces for waste heat recovery; Other special-purpose finned tubes, etc.

Finned tube advantages
1. High Efficiency and Energy Saving: Its heat exchange coefficient ranges from 3000 to 4500 kcal/m²·°C·h, which is 3 to 5 times more efficient than tubular shell heat exchangers.
2. Compact Structure: Plate heat exchangers feature tightly packed plates, requiring less floor space and overall volume compared to other types of heat exchangers. A plate heat exchanger with the same heat transfer capacity as a shell-and-tube exchanger only occupies 1/5 of the area.
3. Easy to clean and dismantle: Plate heat exchangers are clamped tightly by bolts, making them easy to disassemble and clean at any time. Additionally, due to the smooth surface and high turbulence, they are less prone to scaling.
4. Long Service Life: Plate heat exchangers are made of stainless steel or titanium alloy plates, resistant to various corrosive media. Gaskets are replaceable, and they can be easily assembled, disassembled, and maintained.
5. Versatile: Plate heat exchanger plates are individual components, allowing for the addition or reduction of circuits as required, with various configurations; suitable for different process requirements.
6. Leak-proof design; the plate heat exchanger features a sealing groove with a liquid drainage channel, ensuring that different media do not intermix. In the event of a leak, the medium always discharges outward.