Aluminum Extruded Finned Tube,Integrally Finned Tubes

The extruded finned tube is also called integrally rolled finned tube. A certain density of aluminum tube is sleeved on the base tube, and the base tube can be made of carbon steel tube, stainless steel, copper tube and other materials. It is then formed into a compact bimetallic composite tube by tying with a zipper.

Extruded integral finned tubes can be divided into: bimetallic finned tubes and single metal finned tubes.

The bimetallic finned tube is made of two kinds of metal tubes of different materials. The types of base tubes are: copper, copper alloy, stainless steel, carbon steel, etc. Pipe: copper-aluminum composite pipe, steel-aluminum composite pipe.

The stretchability of the metal strip is used to vertically wind the base tube, so that the fins and the base tube are closely joined together, and then the finned tube is coated to reduce the thermal contact resistance and enhance the heat transfer performance of the finned tube. According to different fin types and usage requirements, wound finned tubes can be divided into: U-shaped finned tubes, toothed U-shaped finned tubes, and I-shaped finned tubes.

Extruded finned tube Reference Parameter:
Base Tube Diameter: 10mm-51mm
Base tube wall thickness: 1.65mm-3mm
Fin Thickness: 0.3mm-1.2mm
Fin Pitch: 2mm-15mm
Fin Height: 5mm-16mm
Base tube material:Stainless steel, Carbon steel, Alloy,Titanium, Nickel, Copper etc.
Fin material:Aluminum strip, Copper strip

Advantages of extruded aluminum finned tubes:
small contact thermal resistance, stable structure and long service life, smooth fin surface, not easy to scale, easy to clean, and can maintain good heat transfer performance for a long time. This kind of heat exchange tube is widely used in various equipments such as air cooling, air conditioning, power station, petroleum, chemical industry and air heat exchanger. The general length of the heat exchange tube is about 1M~6M (convenient for transportation and can be increased), the working temperature is below 280°C, and the working pressure is below 3.2MPa.

The characteristics of the extruded aluminum finned tube:
the base tube is a steel pipe, which has good mechanical properties, temperature resistance, pressure resistance and corrosion resistance; the outer material is aluminum, which is light in weight, low in price, easy to process, and has good performance High resistance to atmospheric corrosion, beautiful appearance; high fin strength, can withstand high-pressure washing and descaling; generally does not increase the contact thermal resistance between the fin and the base tube due to corrosion and oxidation of the base tube, and the heat transfer performance is slightly better than that of the winding fin Type finned tube, steel-aluminum composite radiator is a new industry, it is a substitute for cast iron radiator.

Parameters of extruded aluminum finned tube

Extruded Finned Tube is made from mono extruded copper alloys. Fins are up to 0.400″ (10mm) high. Extruded fin tubes are formed helically out of a mono-metal tube. The result is an integrally formed finned tube with an excellent fin-to-tube uniformity providing exceptional efficiency and longevity. Whether rough service, high temperatures, or corrosive environment, extruded fin tubes are a great option for heat exchanger applications. High Finned Tubes can be annealed to a soft state for bending and coiling. This type of product is excellent for heating, refrigeration, machinery coolers, water-heaters, and boilers.

Extruded finned tube advantage
Compared with the ordinary wound finned tube, the contact thermal resistance remains stable in a large range with the temperature change, so the heat transfer performance of the bimetallic aluminum extruded finned tube is better than the spiral fin tube in the limit tube wall temperature range.

In addition, compared with the coiled tube, the bimetallic aluminum extruded fin tube has outstanding corrosion resistance and high strength, it can withstand 4.0MPa water pressure cleaning, the fins still do not fall down, the base of the bimetallic aluminum extruded tube. The tube can be selected according to the corrosion of the fluid in the tube and the processing technology. The base tube can be carbon steel, copper, stainless steel, etc.

Extruded finned tube applications
Extruded finned tubes are the main equipment for air coolers and are commonly used as heat exchangers in power plants (electric, nuclear, thermal and geothermal). Steam condensate system. Chemical and petrochemical industries. Food processing plants and refrigeration technology. Industry (steel mills, incinerators, gas compression facilities). Petrochemical, power plant and power plant renovation, air conditioning and refrigeration, boilers, finned tube economizers and air preheaters. Maximum working temperature is 280°C-300°C.