Flanged tubes are commonly used to cool or heat fluids, as well as to recover waste heat. On the air side, fins are added to a tube’s surface to increase its surface area and increase thermal performance.
If you are searching for extruded finned tubing, look no further. Murphy Thermal Energy Technology was founded in 1992 and has been committed to the development of thermal energy in the HVAC industry.
The market offers a great deal of variety when it comes to finned tubes. Using this guide, you can choose the right one for your needs.
Table of Contents
Fins of the Helical Type
For repairing Air-cooled heat exchangers, there are five types of circular high-finned tubes:
Extruded Finned Tubes
The use of Extruded Finned tubes is ideal for high-temperature and corrosive environments. In addition to heat pipes, dry air coolers, heat exchangers, dehumidifiers, and energy recovery applications, extruded tubing is often used for offshore and remote applications.
‘L’ Finned Tubes
Finned tubes with an L-shaped fin are the most common. The tube and the fin have the maximum amount of contact on this fin.
Aluminum or copper are two metals that are ductile, can withstand temperatures between 150°C and 170°C, can withstand compression, and can be stretched.
‘LL’ finned tubes
There are overlapping feet on the base of a finned tube with an LL shape. Through this overlap, the tube is prevented from moving, separating and corroding. Corrosive environments can cause expensive extruded fins to corrode, whereas LL fins do not.
‘KL’ Finned Tubes
An L-shaped foot is machined into a strip of metal to create the fin in ‘KL’ finned tubes. Afterward, each end of the tube is secured after the fin has been rolled into the pre-knurled tube.
It is also capable of withstanding temperatures up to 250°C without deteriorating due to its enhanced heat transfer.
‘G’ Embedded Finned Tubes
To withstand high temperatures or high pressures, heat exchanger tubes embedded in heat storage vessels must have their fin side cleaned regularly.
Some embedded finned tubes feature carbon steel fins for better conductivity and increased temperature resistance.
HF Welded Fins
A helix finned tube welded at high frequency can be used in petrochemical processes and power generation. Heat exchangers of this type are attached to the base with helical fins using electric resistance welding, ensuring an efficient heat exchange process and resistance to corrosion.
Integral Fins
You can achieve optimal heat transfer with absolutely no footprint and minimal cost by using integrally finned tubes. A finned section of a tube is rolled out from within the wall and becomes an integral part of it, reducing the thickness of the tube wall below the finned section.
Longitudinal Fins
Resistance welds are used to connect the fins of the longitudinally finned tubes diametrically opposite each other, which creates incredibly efficient motors. In the base are U-channels formed and the tube is rolled. The tube is spot welded to the U-channels, and all the fins are multiples of four.
Heat exchangers, as well as fire-rated heaters, and gas coolers can be made with longitudinally finned tubes. It can be made by bending or straightening lengths of weldable or brazing material.