Extruded finned tube
Extruded finned tubes are mostly bimetallic composite finned tubes, which are in the form of base tube sleeved aluminum tubes. (The base tube can be made of carbon steel, stainless steel, copper，or Titanium) through the machine, extrusion to form fins. And the base of the fin and the tube The outer wall fits closely, So the heat transfer coefficient is high, and the heat transfer performance is excellent.
The extruded fin tube also can be made of pure aluminum or pure copper. And the aluminum rolled fin tube is integrally rolled from an aluminum tube. As it has no contact thermal resistance, high strength, thermal shock resistance, mechanical vibration, and thermal expansion performance. And has a considerable expansion of the heat exchange surface, the heat exchanger made of this finned tube is ahead of the string or wound fin heat exchanger.
The processing technology of the steel-aluminum cold-rolled finned tube is that the aluminum tube and the steel tube are first processed into a bimetallic composite tube, and then the fin is formed after mechanical cold rolling.
Utilizing the physical properties of the aluminum tube, a fin tube in which the tube with the steel tube as the core is tightly combined with the cold-rolled aluminum fin is made. It is widely used in steel, petroleum, chemical, machinery, shipbuilding, power station, hospital, and food industries.
Cooper-aluminum composite
Cooper-aluminum composite
Extruded finned tubes
The copper-aluminum composite fin tube is a composite tube of copper and aluminum before rolling the fins. It has a tight binding, low thermal resistance, good heat transfer performance, high strength, low flow loss, and strong corrosion resistance. It is not easy to deform under thermal conditions and has a long working life.
The integrally rolled fins are smooth without burrs, wrinkles, and are easy to clean. It is easy to remove condensed water on the outer surface of the fins during wet cooling in heating and air conditioning projects, and it is not easy to form dust and scale during heating and other heat exchange occasions.
Titanium-aluminum
composite
Titanium-aluminum composite
Extruded finned tubes
Coastal power plants generally use copper-aluminum composite finned tubes as heat transfer elements for air coolers. However, in the contaminated cooling water medium (such as seawater), the inner layer of brass cracks and leaks due to stress corrosion, and has a short service life. The titanium pipe has excellent corrosion resistance, but pure titanium pipe is more expensive. The titanium-aluminum composite finned tube can ensure the corrosion resistance of the inner layer while reducing the cost.
Pure aluminum
Pure aluminum finned tube
The single-metal composite finned tube is integrally rolled from an aluminum tube, called an aluminum rolled finned tube, which has no contact thermal resistance, high strength, heat resistance and mechanical vibration, good thermal expansion performance, and has a considerable expansion of the heat exchange surface.
The pure copper finned tube is a kind of heat exchange element. In order to improve the heat exchange efficiency, fins are usually added to the surface of the heat exchange tube to increase the outer surface area (or inner surface area) of the heat exchange tube, so as to achieve the purpose of improving the heat exchange efficiency. The integral rolling fin tube has no contact heat Resistance, good heat transfer performance, high strength, heat resistance and mechanical vibration, good thermal expansion performance.
