Fin and tube surface connection should be closely spaced, otherwise the contact thermal resistance is great, affecting the heat transfer effect. Commonly used connection methods are heat sets, inlay, tension winding and welding. In addition, the finned tube may be manufactured through integral rolling, integral casting, or machining.

In chemical production, gas heating and cooling problems are often encountered. Because the convective heat transfer coefficient of the gas is very small, the gas-side thermal resistance becomes the heat transfer controlling factor when the other fluid exchanging heat with the gas is water vapor condensing or cooling water. At this time, to strengthen the heat transfer, it is necessary to increase the convective heat transfer area at the gas side. Fins are arranged on the gas side of the heat transfer tube, so that the heat transfer area of the gas side is increased, the gas turbulence degree is enhanced, and the heat resistance of the gas side is reduced, therefore enhancing the gas heat transfer coefficient.

Of course, the installation of fins will increase the cost of equipment, but generally when the ratio of convective heat transfer coefficient of two fluids is more than 3: 1, the use of finned tube heat exchanger is economically reasonable. Finned tube heat exchanger as an air cooler, is widely used in industry. Air instead of water can not only be used in the dry areas, but it can be used where water is sufficient, and makes great economic benefits as well.