Low Fin (Integral) tubing is a type of extruded tubing that consists of short low fins.
The low fin tube have the advantage of adding surface area to a smooth tube while maintaining the same outside diameter. Low Fin Enhanced tubes can be used in standard shell and tube baffles and tube sheets.
This method of construction is very different from cutting grooves onto the tube as is often done by people who are on the lookout for a shortcut or who don’t know any better.
Materials - Low Finned Tubes
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.
| Material | Standard |
| Carbon Steel | SA 179 / A 179 |
| Carbon Steel | SA 210 / A 210 |
| Carbon Steel | SA 334 / A 334 |
| Stainless Steel | SA 213 / A 213 |
| Duplex Stainless Steel | SA 789 / A 789 |
| Copper & Cu Alloys | SB 111 / B 111 |
| Titanium & Ti Alloys | SB 338 / B 338 |
Low-finned tubes solutions are already available in copper, copper-nickel, aluminum, steel, stainless steel, and titanium.
The uses differ, but as far as pipes with an increased outer surface area are concerned, they are all tubes with welded peripheral fins onto steel pipes, also known as high fin tubes. Low finned tubes involve the formation of fins by direct rotational processing of steel pipes, meaning there is no worry of detachment even if later bent. Moreover, they possess excellent durability and anti-vibration properties once put into operation.
Low-finned tubes are used in following fields:
heat exchangers for power plants (nuclear, electric, thermal and geothermal power plants)
chemical and petrochemical industries
high corrosive systems (evaporators, condensers,...)
food processing and refrigeration industries.
Benefits of Low Finned Tubes
Offers 2.5-3 times the external surface area of bare tube
Enhanced heat exchanger efficiency means less tube is required to accomplish the same heat transfer as a bare tube
Low finned tube can increase the performance of an existing exchanger without the difficult and expensive task of building new shells etc
Reduced space and weight can be extremely valuable in offshore production or high elevation distillation columns. Low finned technology can transform large shell and tube exchangers into compact heat exchangers
Low fin dimension capability
| Description | Size dimension |
| Tube OD | Min. 12,7mm / Max. 31,75mm |
| Tube thickness (plain section) | Min. 1,245mm / Max. 3,404mm |
| Fin pitch | 19 – 26 – 27 – 28 – 30 – 36 fins per inch |
| Fin height | Max. 1,40mm |
| Tube length | Max. 25000mm |
A Low Fin Tube is formed by passing a tube through a set of rollers that form the fins from the parent material of the tube by making it flow in the desired way.
Low Finned Tube material and application
| No. | Standards | Material | Application |
| 1 | ASTM A498 | Carbon & Carbon alloy | Heat exchanger for Oil refinery and Petrochemical plants |
| 2 | ASTM A1012 | Stainless & Duplex alloy | Condenser and Heat exchanger for Petrochemical & Power plants |
| 3 | ASTM B359 / ASME SB359 | Copper & Copper alloy | Heat exchanger for Petrochemical plants, Condenser & Evaporator for Power plants |
| 4 | ASTM B891 | Titanium & Titanium alloy | Condenser and Heat exchanger for Steam & Nuclear power plants |
Features of Low Finned Tube
Low Finned Tubes are a type of finned tube that features a continuous external fin, helically wound on the base tube with a relatively low height. The main features of low finned tubes are as follows:
Increased Heat Transfer: The external fins of the low finned tube greatly enhance heat transfer and enable efficient heat exchange between the fluid inside the tube and the surrounding environment.
Compact Design: Low finned tubes have a compact design and provide greater heat transfer capabilities than plain tubes, resulting in smaller equipment sizes and a smaller overall footprint.
Reduced Material Costs: The use of low finned tubes reduces the amount of material needed to achieve the same level of heat transfer performance, thus potentially reducing manufacturing costs.
Corrosion Resistance: Low finned tubes are often made of corrosion resistant materials like copper or stainless steel which extends the life of the tube and lowers maintenance costs.
Increased Efficiency: Due to the increased heat transfer from the external fin, the low finned tube can operate at higher efficiency and lower costs than plain tubes.
Low finned tubes are commonly used in applications such as heat exchangers, air conditioning systems, and power generation facilities.
Low Finned Tube For Heat Exchangers
Low-fin (integral) tube is an extruded tube composed of short and low fins, and a high-efficiency heat-exchange tube type in which threaded fins are formed on the outer surface of the heat-exchange tube by rolling. The tube and fin are in the same piece of tube, also known as " N" fin type.
Because Low Finned Tube is an integral tube, there is only one material for the tube and fins
We offer you a wide range of materials and can expand our offering at any time to meet your specific needs in terms of thermal conductivity, mechanical properties or corrosion resistance.
