Seamless Low Finned Tubing For Compact Heat Exchangers
Low fin tubes enhance heat transfer in compact heat exchangers with seamless, low-height fins.
Seamless Low Finned Tubing For Compact Heat Exchangers
Low fin tubes enhance heat transfer in compact heat exchangers with seamless, low-height fins. offering superior corrosion resistance, they are ideal for petrochemical, refrigeration, and power generation systems.
Low Fin Tubes, also referred to as low finned tubes, are seamless heat exchanger fins designed to optimize thermal transfer by increasing the external surface area through low-height fins formed directly from the base tube material. These thermal transfer tubes are manufactured using cold rolling or extrusion processes, ensuring a robust, integral structure without welds or joints. Conforming to standards such as ASTM A179, A213, ASTM B359, and ASME SB338, low fin tubes are widely used in petrochemical, refrigeration, power generation, and chemical processing industries, offering excellent corrosion resistance and boiler pipeline protection in demanding environments.
The production process involves rolling or extruding fins from the base tube, creating low fins with heights ranging from 0.3mm to 1.5mm and fin pitches of 19 to 43 fins per inch (FPI). Base tube outer diameters typically range from 12.7mm to 25.4mm, with customizable lengths up to 25 meters. Materials include carbon steel (A179, A192), stainless steel (TP304, TP316), copper alloys (C12200, C70600), and titanium (Gr2, Gr12), with optional surface treatments like galvanization, 3LPE, or epoxy coatings to enhance corrosion resistance. The seamless design eliminates gaps, ensuring high durability and resistance to thermal cycling and vibration in air cooled exchangers and shell-and-tube heat exchangers.
Low Fin Tubes undergo stringent testing, including hydrostatic, eddy current, tensile, and flattening tests, to comply with ASTM A498, A1012, and TEMA standards. Their low-fin geometry increases the external surface area by 2.5 to 3 times compared to plain tubes, significantly improving heat transfer efficiency while maintaining low pressure drop. These tubes are ideal for applications where shell-side heat transfer is critical, such as condensers, evaporators, and oil coolers, with operating temperatures up to 260°C and pressures up to 10 MPa. The smooth fin surfaces reduce fouling, making them suitable for handling viscous fluids or gases with particulates in industries like refrigeration and petrochemical processing.
Compared to high-fin or welded fin tubes, low finned tubes offer a compact and cost-effective solution, reducing exchanger size and material costs without compromising performance. Their seamless construction ensures consistent heat transfer under cyclic thermal loads, making them ideal for retrofitting existing systems or designing compact heat exchangers. In applications like air conditioning, waste heat recovery, and boiler economizers, low fin tubes provide reliable performance in corrosive environments, such as seawater or acidic media, due to their robust material options and protective coatings.
Addressing challenges like pipeline corrosion, thermal inefficiency, and space constraints, low fin tubes deliver a durable and efficient solution for thermal transfer tubes. Their ability to enhance heat transfer while minimizing weight and footprint makes them a preferred choice for engineers seeking high-performance solutions in demanding industrial applications. With superior boiler pipeline protection, these tubes ensure long-term reliability and energy efficiency in petrochemical, refrigeration, and power generation systems.
High-efficiency extruded tubes with integral fins for superior heat transfer and compact equipment design.
Tube and fins formed from a single piece, ensuring durability and strong bonding.
Low-profile fins increase surface area and improve thermal efficiency.
Available in copper, stainless steel, carbon steel, and custom alloys.
Compact fin structure enables efficient heat exchange in smaller equipment sizes.
Heat Exchangers: Shell-and-tube, condensers, evaporators.
HVAC & Refrigeration: Air conditioning and cooling systems.
Chemical Processing: Petrochemical and chemical industries.
Power Generation: Boilers, condensers, and energy systems.
| Description | Size Dimension |
|---|---|
| Tube OD | Min. 12.7 mm / Max. 31.75 mm (corrected decimal separator) |
| Tube thickness (plain section) | Min. 1.245 mm / Max. 3.404 mm (corrected decimal separator) |
| Fin pitch | 19, 26, 27, 28, 30, 36 fins per inch |
| Fin height | Max. 1.40 mm (corrected decimal separator) |
| Tube length | Max. 25000 mm |
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.
| 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 |
We offer you a broad portfolio of materials and can expand our offerings at any time to meet your specific needs regarding thermal conductivity, mechanical properties, or corrosion resistance.
For Aluminum L-Foot finned tubes, the fin material is aluminum, either 1100-0. The tube material is generally carbon steel, stainless steel, or brass; however the tube can be of any material.
For Welded Helical Solid and Welded Helical Serrated finned tubes, the fin and tube materials can be any combination that can be welded together using HIGH FREQUENCY WELDING process.
The materials chosen for a given application are a function of service temperature, corrosive environment, and/or erosive environment. Common tube materials used for our welded product lines include: carbon steel, carbon moly, chrome moly, stainless steel, Inconel, and Incoloy. Common fin materials include: carbon steel; stainless steels of types 304, 310, 316, 321, 409, and 410; Nickel 200, and Inconel.
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 | Grade |
|---|---|
| Carbon Steel Tubes | A179, A192, SA210 Gr A1/C, A106 Gr B, A333 Gr3/Gr6/Gr8, A334 Gr3/Gr6/Gr8, 09CrCuSb, DIN 17175 St35.8/St45.8, EN 10216 P195/P235/P265, GB/T3087 Gr10/Gr20, GB/T5310 20G/20MnG |
| Alloy Steel Tubes | A209 T1/T1a, A213 T2/T5/T9/T11/T12/T22/T91, A335 P2/P5/P9/P11/P12/P22/P91, EN 10216-2 13CrMo4-5/10CrMo9-10/15NiCuMoNb5-6-4 |
| Stainless Steel Tubes | TP304/304L, TP316/TP316L, TP310/310S, TP347/TP347H |
| Copper Tubes | UNS12200/UNS14200/UNS70600, CuNi70/30, CuNi 90/10 |
| Titanium Tubes | B338 Gr 2 |
Our factory is equipped with professional technical research and design personnel who can provide product optimization design and services.
Quality is the foundation of an enterprise. We adopt advanced production equipment and experienced technical personnel, constantly improve product technology, strictly control every processing step, and strive to compete with first-class quality products.
Testing instrument
Hardness tester
Drawing Machine
Component analyzer
Aluminium KL finned tube
L LL KL G production line
Production equipments
Extrusion equipment
Fin tube bending
Finned tubes are available in many types and configurations. Below is a detailed classification based on fabrication process, fin geometry, material, and applications.
Longitudinal finned tubes boost heat transfer effi...
Laser welded finned tubes enhance heat exchanger e...
Helical solid finned tubes enhance heat transfer e...
High fin tubes maximize heat transfer efficiency i...
L, ll, and kl finned tubes optimize heat transfer ...
Integral low fin tubes optimize heat transfer in c...