Tubes with flanges are often used to cool or heat fluids or to recover waste heat. Surfaces of the tubes are enhanced with fins that increase their surface area and improve their cooling properties.
On the market, finned tubes are available in a wide range of designs. Follow this guide to choose the most suitable finned tubes for your needs.
An Elongated Helical Fin
Furthermore, air-cooled heat exchangers are repaired with five varieties of circular high-fan tubes:
Tubes With Finned Ends
Extruded Finned tubes are ideal to be used in high-temperature and corrosive environments. Tubes made of extruded plastic are commonly used for heat pipes, dry air coolers, heat exchangers, dehumidifiers, recovery of energy, and offshore applications.
Tubes With ‘L’ Fins
L-shaped fins are one of the most commonly found finned tubes. In this fin, the tube and the fin are in direct contact with each other.
Tubes with an L fin are available in aluminium or copper, ductile metals that have the capability of withstanding temperatures between 150°C and 170°C, as well as compression, and can be stretched.
Tubes With LL Fins
There are overlapped feet on the top and bottom of an LL-shaped finned tube.
Through this overlapped fin, the tube cannot move or separate, and it also prevents corrosion across the tube. When used in corrosive environments, LL fins are an alternative to expensive extruded fins.
Tubes With ‘KL’ Fins
In the ‘KL’ finned tubes, the fin consists of a strip of metal, which is shaped into a precise L-shape. Each end of the tube is then secured after the fin is rolled into the pre-knurled tube.
This finned tube can be used at temperatures up to 250°C without deteriorating, as well as enhancing heat transfer.
Tubes With Embedded ‘G’ Fins
For an embedded heat exchanger tube to withstand high temperatures or high pressures, the fin side needs to be cleaned regularly.
For better conductivity and temperature resistance when operating below 400°C, some embedded finned tubes have carbon steel fins.
Fins Welded to HF
Helically finned tubes welded at high frequencies are excellent for petrochemical and power generation applications. In order to ensure efficient heat exchange and corrosion resistance, this type of heat exchanger uses electrical resistance welding to attach the helical fin to the base.
Fins Integrated Into The Body
When you need to improve heat transfer between fluids with a small footprint and low cost, completely finned tubes are the best choice. The tube wall below the finned section is thinner due to the finned section of it being rolled out of the wall and being integrated into it.
Fins That Extend Longitudinally
Resistance-welded diametrically opposing fins are a key aspect of the longitudinally finned tubes. All fins are multiples of four, and the base is formed with U-channels before the tube is rolled and spot-welded to it.
Gas coolers and tank heaters can also be heated using longitudinally finned tubes. Sometimes this product is made using materials that are weldable and brazeable that have been U-bent or straightened.