What's The Fin Tube

In order to improve the heat transfer 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 transfer efficiency.

As a heat exchange element, the finned tube works under high-temperature flue gas conditions for a long time. For example, the finned tube heat exchanger for boilers is in a harsh environment, high temperature, high pressure and corrosive atmosphere, which requires the finned tube to have higher performance indicators.

1) Anti-corrosion

2) Anti-wear

3) Low contact resistance

4) High stability

5) Dust resistance
There are many types of finned tubes, and new varieties are constantly emerging. In a broad sense, they can be classified according to the following aspects.

1. Classification by processing technology

1) Rolled fin tube (extruded fin tube); 2) Welded fin tube (high frequency welded fin tube, submerged arc welded fin tube); 3) Rolled fin tube; 4) Shaped fin tube; 5) Cast fin tube; 6) Stretch wound fin tube; 7) Flanged tube.

2. Classification by fin shape

1) Square fin tube; 2) Round fin tube; 3) Spiral fin tube (curled fin tube); 4) Longitudinal fin tube; 5) Corrugated fin tube; 6) Spiral serrated fin tube (spiral serrated fin tube); 7) Needle fin tube; 8) Integral plate fin tube (plate fin); 9) Inner fin tube (inner fin tube). Etc.

3. According to whether the fin material of the fin tube is the same as the base tube, it can be divided into.

1) Single metal fin tube; 2) Bimetallic composite fin tube

4. Classification of single metal fin tube by material

1) Copper fin tube; 2) Aluminum fin tube; 3) Carbon steel fin tube; 4) Stainless steel fin tube; 5) Cast iron (cast steel) fin tube; etc.

5. Classification by use

1) Fin tube for air conditioning; 2) Air-cooled fin tube; 3) Boiler: fin tube for water-cooled wall, economizer, air preheater; 4) Fin tube for industrial waste heat recovery; 5) Other special purpose fin tubes, etc.

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