DELLOK Aluminum KL Type Spiral Finned Tube

L/LL/KL Finned Tube Product Description

^{- KL Finned Tube(Knurled Aluminum Tubing)}

^{This is manufactured similar to L fin except that the base tube is knurled before wrapping the 'L' shaped fin strip. After wrapping the fin strip, the fin foot is also knurled on the base tube to increase the bonding between the tube & fin. This will result in increased heat transfer performance.}

^{Maximum Operating Temperature- 260 deg C}

^{Tube Material - No theoretical limit.}

^{Fin Material - Aluminium or copper}

^{- L Finned Tube}

^{Aluminium fin strip is formed to L shape and then tension wound to the base tube.}

^{Maximum operating temperature for L fin is 150 deg C.}

^{Fin Material - Aluminium (or) copper}

^{Tube Material - No theoretical limit}

^{- LL Finned Tube}

^{Aluminium fin strip is formed to L shape and tension wound on the tube with overlapping of fins as shown in the figure.}

^{Maximum operating Temperature for LL fin is 180 deg C.}

^{Fin Material - Aluminium or copper}

^{Tube Material - No theoretical limit}

L/LL/KL Finned Tube(Knurled Aluminum Tube) Manufacturing Process

^{Applied Fin Tube is made with strip wrapped under tension around the base of the tube. Fins are welded to the base tube at the strip ends.}

L/LL/KL Finned Tube(Aluminum Finned Tubes) Advantages

^{- L Finned Tube}

^{Suitable for low-temperature application.}

^{The finning type is the most cost effective method compared to the others.}

^{The failed fins can be easily removed during production and bare tube can be used again for finning.}

^{There is no need for make a helical grove over the core tube.}

^{It is possible to place the fins on a very thin-walled tube with is particularly desirable when using expensive alloys as core tube.}

^{The tube can withstand a temperature of up to 130°C without the risk of atmospheric corrosion or thermal stress.}

^{- LL Finned Tube}

^{This type of finned tube is often used as an alternative to the more expensive extruded type fin in corrosive environments.}

^{Maximum operating temperature 170ºC.}

^{- KL Finned Tube}

^{Corrosion-resistant Tubes}

^{Vibration resistance}

^{It can withstand temperatures of up to 320°C (608°F).}

^{High thermal performance and stress resistance combined with protection from air corrosion is a one-of-a-kind combo.}

^{Any form of finned tube can be replaced with KL.}

            L/LL/KL Finned Tube Properties

             ^{Atmospheric Corrosion Resistance: OK}

             ^{Mechanical Resistance: Poor}

             ^{Fin Contact: Interference Fit}

             ^{Fin To Tube Bond :Moderate}

             ^{Heat Transfer Efficiency :Moderate}

             L/LL/KL Finned Tube Applications

             ^{-the petroleum, chemical and petrochemical process industries.}

             ^{natural gas treatment}

             ^{-the steel industry: blast furnace and converter systems}

             ^{-power generation: steam turbine exhaust condensing}

             ^{- contact condensing with cooling of circulating condensate}

             ^{- fossil and nuclear power plants}

             ^{-air conditioning (Freon, ammonia, propane)}

             ^{- incineration of household refuse}

             ^{- compressor coolers, etc.}

^{Fin Type: L/LL/KL Finned Tube}

^{Tube Material: Carbon steel, stainless steel, copper, aluminum}

^{Fin Material: Copper, aluminum}

^{Fin Tube Length: No Limit}

^{Working temperature: 230℃.}

^{Features: Adopting the winding process, the production efficiency is high, the lamella distance is uniform, the heat transfer is good, the finization ratio is high, the base tube can be protected from air erosion.}

L/LL/KL Finned Tube

^{Finned tube is a tube with small finned fins around its outer surface. These fins act as a filter and a mechanism for transferring heat from the material inside the tube to or from the outer space. Finned tubes are used in applications where heat is transferred from a hot fluid to a cooler fluid through the wall of the tube. The rate at which this heat transfer occurs depends on three factors:}

^{The difference in temperature between the two fluids.}

^{The coefficient of heat transfer between each fluid and the wall.}

^{Surface area of fluid exposure.}

L type finned tube

Adopting the winding process, the production efficiency is high, uniform lamella distance , good heat transfer, high finization ratio, the base tube can be protected from air erosion. The aluminum fin or copper fin is folded into an L shape and continuously spirally wound on the outer surface of the base tube under the action of tension.

Maximum working temperature-150°C (302°F), acceptable for atmospheric corrosion resistance, poor mechanical resistance. Commonly used heat sink materials are aluminum and copper.

LL type finned tube

^{Under the L-shaped foundation, the fin root completely covers the outer surface of the base tube; to some extent, this fin type guarantees better corrosion resistance. Maximum working temperature-180°C (356°F), acceptable for atmospheric corrosion resistance, poor mechanical resistance. Commonly used heat sink materials are aluminum and copper.}

KL type finned tube

^{Before the fins are continuously wound on the surface of the steel pipe, the outer surface of the base pipe needs to undergo a knurling process; after the fins are wound, the root of the fin attached to the steel pipe will also be knurled to strengthen the steel pipe and Combination of fins. For this reason, this fin type ensures better heat transfer characteristics under the fins of L and LL. Maximum working temperature-260°C (500°F), acceptable for atmospheric corrosion resistance, poor mechanical resistance. Commonly used heat sink materials are aluminum and copper.}

L/LL/KL Finned Tube Applications

^{Mainly used in air coolers in petrochemical, electric power, paper making, tobacco, building heating and other industries, air heaters and air heaters in spray drying systems such as vegetable protein and starch in the food industry. Blast furnace and converter systems, power generation: condensate exhaust gas discharged from steam turbines, condensate contact cycle cooling condensation, fossil and nuclear power plants, air conditioners (Freon, ammonia, propane), waste incineration equipment, compressor coolers, etc.}

^{We customized finned tube according to customer indivisual requirement, for more details about L/LL/KL finned tube please inquire us!}