Finned Tubes----L-Foot Fin – Wrap-On Fin
L-Foot Tension Wound Finned Tubes additionally referred to as Wrap-On Finned Tubes, square measure employed in applications wherever temperatures don't exceed concerning three hundred degrees Gabriel Daniel Fahrenheit in alternative words for low-temperature application wherever some extent of tube wall protection is needed. L-Foot tension wound finned tubes incorporates skinny metallic element fin strip tightly wound helically round the tube circumference. A “foot” is initial shaped on one facet of the fin strip (hence the name L-Foot). The strip is then wound tightly round the tube, with the foot touching on the tube outer surface. The short horizontal limb of every L is to bear with the base-tube surface to hide it fully. Tension within the fin strip because it is wrapped round the tube serves to seat the fin foot forcefully on the tube, and to carry the fin firmly in situ. L-footed finned tube offers most heat transfer at lower temperatures. The distinctive L-shaped style holds fins bolt to resist heat sport and high speed air vibration. This fin offers a particular degree of part protection of the tube wall to against corrosion. The broad connect surface between the tube and also the finning enhances heat transfer. This fin style is extremely economical nonetheless value effective.
The ends of the fins square measure pinned to ban the metallic element fin from unravelling, and loosing the connect between the fin foot and also the tube. This contact is essential to the operation of the air cooler, since the warmth is transferred from the tube wall, through the fin, to the encompassing close air.
Advantages:
This kind of fin tubes suitable for low-temperature application
The finning kind is that the most value effective technique compared to the others.
The failing fins is simply removed throughout production and blank tube is used once more for finning.
There is no would like for create a volute grove over the core tube.
It is doable to put the fins on a awfully thin-walled tube with is especially fascinating once mistreatment dear alloys as core tube.
The tube will stand up to a temperature of up to 130°C while not the chance of part corrosion or thermal stress.
Weakness:
The fin isn't therefore sturdy to resist mechanical injury once external forces applied on fin space
Handling shall be through with care to avoid any injury.
Finned tubes is also broken whereas mistreatment either steam or aggressive water for cleansing
As the fins square measure helically wrapped in grooves, un-finned space isn\'t coated which may be exposed to corrosive media and galvanic corrosion at the bottom of the fins is increased
Tube shall be straight with smooth facet space to form an honest finned tube
Fins ought to be mounted at each ends avoiding un-wrapping
Application:
Oil and gas refineries
Petroleum, chemical and organic compound industries
Natural gas treatment
Steel creating trade
Power plants
Air acquisition
Compressor coolers
Key Words: Key Words: Finned Tube, Fin Tubes, Extruded Fin Tubes, Embedded Fin Tube, L Fin tube, Tubos Aletados