Longitudinal Finned Tubes

Longitudinal Finned Tubes

Longitudinal finned tubes are produced by welding the fins with resistance along the length of the tube. The fins first form a u-shaped channel, allowing each of the u-shaped legs to form a fin. The channel is cut to the appropriate length and then welded into place along the length of the tube and resistance. The channels are a pair of welded, polar opposites, so the number of fins specified must be a multiple of four.

For a given tube or tube size, the desired heat transfer surface area per tube unit length can be obtained by specifying the appropriate fin height and number of fins. The maximum number of fins depends on the outer diameter of the tube – the larger OD tube can accommodate more fins.

Description

Fin tube reference

Carbon steel fins are available on carbon, stainless steel, or copper tube. Please call for a specific size if not listed

TypeDescriptionBase tube
O.D. (mm)
Fin specification (mm)
Fin pitchFin heightFin thick
EmbeddedG-type fin tueb16-632.1-5<17~0.4
ExtrudedSingle metal combined metal8-511.6-10<170.2-0.4
Low fin tube t-type fin tube10-380.6-2<1.6~0.3
Bamboo tube corrugated tube16-518-30<2.5/
Woundl/kl/ll type fin tube16-632.1-5<17~0.4
StringString fin tube25-382.1-3.5<200.2-0.5
U-typeU-type tube16-38///
WeldingHF-welding fin tube16-2193-255-300.8-3
H/HH type fin tube25-638-30<2001.5-3.5
Studed fin tube25-2198-305-35φ5-20

According to user needs, we can produce all kinds of steel strip winding finned tube and steel aluminum composite finned tube.

Materials:Carbon steel fins are available on carbon, stainless steel, or copper tube. Please call for a specific size if not listed

We offer you a broad portfolio of materials and can expand our offering at any time to meet your specific needs regarding thermal conductivity, mechanical properties, or corrosion resistance.

  • Base tube: Carbon steel, Stainless steel, Copper, Cupro Nickel, Aluminium, Alloy Steel
  • Fin: Carbon steel, Stainless steel, Copper, Aluminium
  • Rings: Carbon steel, Aluminium, Hot dip galvanizing

Fin tubes are a type of heat exchanger used in many industries. They are made of aluminum cladded carbon steel and have brazed aluminum fins. The fins increase the surface area of the tubes, which allows them to transfer heat more efficiently. This makes them ideal for applications where high heat transfer rates are required.

Finned tubes are used in applications that involve the transfer of heat from a hot fluid to a colder fluid through a tube wall. They are used in condensers, coolers, and furnaces. The larger surface area means that fewer tubes are needed compared to the use of plain tubes.

The type of finned tube is chosen depending on the specific requirements of each process equipment unit. The fin type and combination of materials are chosen based on the specific requirements of each process equipment unit.

Fin tubes are a type of heat exchanger used in many industries. They are made of aluminum cladded carbon steel and have brazed aluminum fins. The fins increase the surface area of the tubes, which allows them to transfer heat more efficiently. This makes them ideal for applications where high heat transfer rates are required.

Finned tubes are used in applications that involve the transfer of heat from a hot fluid to a colder fluid through a tube wall. They are used in condensers, coolers, and furnaces. The larger surface area means that fewer tubes are needed compared to the use of plain tubes.

The type of finned tube is chosen depending on the specific requirements of each process equipment unit. The fin type and combination of materials are chosen based on the specific requirements of each process equipment unit.

Why use finned tubes?

Finned tubes are used in applications where high heat transfer rates are required, such as in power plants and refrigeration systems. The fins increase the surface area of the tube, allowing for more efficient heat transfer between two fluids. This makes them an ideal solution for heat transfer applications where space is limited.

Finned tubes are used in condensers, coolers, and furnaces. The larger surface area means that fewer tubes are needed compared to the use of plain tubes. This can decrease the overall equipment size and can in the long-run decrease the cost of the project.

Finned tube heat exchangers can be used in a broad range of industries including oil & gas, power generation, marine and HVAC&R. They generally use air to cool or heat fluids such as air, water, oil or gas, or they can be used to capture or recover waste heat.

The biggest problem with using a finned tube heat exchanger is with the cleaning and maintenance of the outer surface of the tubes. Because of the fins, mechanical cleaning becomes very difficult and you would have to go for chemical cleaning.

What is the difference between fin tube and finned tube?

Fin tubes are a type of heat exchanger that are used in many industries. They have a finned surface, which increases their surface area and allows them to transfer heat more efficiently. Finned tubes are typically used in two-phase heat transfer applications, such as condensation or evaporation.

Finned pipes are generally used for single-phase heat transfer applications. Both finned pipes and finned tubes use fins to increase the surface area for heat transfer.
Finned tubes are used when the heat transfer coefficient on the outside of the tubes is appreciably lower than that on the inside. They can reduce the equipment cost and also equipment sizes.

There are several kinds of fin tubes, such as:

  • Extruded fin tube
  • Crimped spiral fin tube
  • G type embedded fin tube
  • L/KL/LL Foot Fin Tube

What is the difference between high fin and low fin tubes?

High fin tubes are better for applications where the temperature difference between two fluids is high. Low fin tubes are better for applications where the temperature difference is low.

High fin tubes are made of a metal tube surrounded by an aluminum or copper strip. The strip can be applied in different ways, including type L, type KL, type LL, type G (embedded), or type extruded. The higher the fin height, the more surface area and heat transfer capabilities.

Low fin tubes are made of a single material and have a smaller fin of about 1/16th of an inch. They are generally used in liquid to liquid or liquid to gas applications such as coolers, condensers, and chillers.

The profile of the fins has a significant effect on the performance of a finned tube heat exchanger. The larger the fins and the tighter the fin pitch, the more thermal conductivity is achieved.

What is the role of finned tube in heat transfer?

Finned tubes are a series of tubes with fins on the outside. The fins increase the surface area for heat transfer, which increases the rate of heat exchange. Finned tubes are used in heat exchangers to transfer heat between hot and cold streams. The heat transfer rate depends on the temperature difference between the two fluids and the heat transfer coefficient between each of the fluids.

Finned tube heat exchangers are used in a variety of industries, including:

  • Oil and gas
  • Power generation
  • Marine
  • HVAC&R

Finned tube heat exchangers can be used to:

  • Cool or heat fluids such as air, water, oil, or gas
  • Capture or recover waste heat
  • Finned tubes come in two types: transverse and longitudinal.

What is the heat transfer in tube and fins?

Heat transfer in tube and fins is a process that involves a fluid passing through tubes and conducting heat to fins. The fins then dissipate the heat to air that is blown over them. The fins increase the surface area for heat transfer, which increases the rate of heat exchange.

The amount of heat an object transfers is determined by the amount of conduction, convection, or radiation. The thermal flux is a function of both the thermal conductivity of solid parts and the convection heat coefficient between the gas and the surrounding walls. The shape and dimensions of the tubes and fins also affect the convection heat coefficient.

In an air-cooling fin-and-tube heat exchanger, heat transfers from the air flowing outside tubes to the liquid flowing inside the tubes. Because air has low thermal conductivity and density, it has poor heat transfer capability.

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