Low-Fin finned tubes are a type of integral finning, where the fins are formed from the same tube without adding additional material. This design allows the outer diameter of the finned section to be equal to that of the smooth tube, ideal for shell and tube exchangers. During the finning process, part of the thickness of the tube wall is used, reducing the wall in the finned section.
These tubes are commonly used in shell and tube exchangers, as well as gas-gas and liquid-gas heat exchange applications, thanks to their efficient and robust design.
Tube and fin material:
Aluminum, Copper, Stainless steels, Bronze,
Titanium, Carbon Steels
Fins per inch (FPI):
9 -11- 19 – 26 FPI.
Tube Diameter:
12.7mm – 38mm.
Fin Height:
1mm – 3mm (depending on the material).
Medium-Fin finning is an integral type of finning where the fins are formed directly from the base tube. This finning is categorized as Medium-Fin when the fin heights range from 2.5 mm to 5 mm. The diameter of the finned section is adjusted based on the tube material and the desired fin height, allowing for design flexibility.
These tubes are used in a variety of applications, including condensers, heating coils, and refrigeration systems for compressed air, oil, and solvents. They are particularly noted for their effectiveness in enhancing heat transfer.
Tube and fin material:
Aluminum, Copper, Carbon Steels
Fins per inch (FPI):
11-19 FPI.
Tube Diameter:
12.7mm – 38mm.
Fin Height:
2.5mm – 5mm.
High-Fin finning is a type of continuous helical integral finning, with fins formed from the same tube.
It is considered High-Fin when the fin heights vary from 7 mm to 15 mm.
Similar to the Medium-Fin, the diameter of the finned section is adjusted according to the tube material and the height of the fin.
These tubes are used in water heaters, oil coolers, water systems, solvents, compressed air and air coolers.
Its design allows maximizing heat transfer, ideal for applications that require high thermal efficiency and durability.
Tube and fin material:
Aluminum and Copper.
Fins per inch (FPI):
5-11 FPI.
Tube Diameter:
12.7mm – 38mm.
Fin Height:
7mm to 16mm
Integral longitudinal finning is created from an extruded aluminum profile, resulting in a single piece that combines both tube and fins. This integral structure ensures efficient heat transfer and superior durability compared to other finning methods.
Depending on the operating pressure, these finned profiles can be clad with a steel tube, which combines the high thermal conductivity of aluminum with the mechanical strength of steel. This design is ideal for applications such as evaporators and regasifiers, where high thermal efficiency and structural robustness are required.
Tube and fin material:
Carbon steels, Stainless steels, Aluminum.
Tube Diameter:
10mm upwards.
Fin Height:
4mm-50mm.
Maximum Length (LT):
Up to 18 meters.
Corrugated surface tubes are manufactured using a helical embossing process on the tube wall, achieved through cold rolling. This method ensures a consistent thickness along the entire length of the tube, maintaining both structural integrity and thermal efficiency.
The corrugated surface introduces increased turbulence into the fluid, which significantly enhances the heat transfer coefficient compared to smooth tubes while resulting in a lower pressure drop. These tubes are ideal for applications such as chillers, coaxial exchangers, coils, and shell-and-tube exchangers, where maximizing heat transfer and improving energy efficiency are critical.
Material:
Aluminum, Copper, Stainless steels, Bronze, Titanium, Carbon steels.
Tube Diameter:
10mm to 63mm.
Fins per inch (FPI):
Corrugated pitch 3mm to 20mm.
Maximum Length (LT):
Up to 18 meters
G-Fin finning is achieved by rolling an aluminum or copper strip onto the outer surface of a tube, forming a flat helical fin.
The main feature is its mechanical joint, obtained by inserting the fin base into a slit in the tube wall, ensuring optimal fastening.
This design allows excellent heat exchange and withstands high working temperatures.
It is ideal for applications that require high efficiency and thermal resistance, such as heat exchangers, refrigeration and heating systems.
Tube Material:
Ferrous, non-ferrous and some alloys.
Fin Material:
Aluminum, Copper, Carbon steel, Stainless steel.
Tube Diameter:
12.7mm-50.8mm.
Type of service:
High temperature.
Maximum Working Temperature:
Aluminum: 343°C (650°F)
Carbon Steel: 450°C (850°F)
Stainless steel: 540°C
(1000°F)
L-Fin finning is performed by rolling an aluminum or copper strip with an “L” fold on the surface of the tube, forming a flat helical fin.
Clamping is by tightening adjustment, with the flap completely covering the tube for efficient heat exchange.
Suitable for temperatures up to 176°C, these tubes are ideal for heat exchangers, condensers, and cooling and heating systems.
Tube Material:
Ferrous, non-ferrous, and some alloys
Fin Material:
Aluminum-Copper
Tube Diameter:
12.7mm-50.8mm
Type of service:
Light Duty
Maximum Working Temperature:
Up to 176°C (350°F)
The LL-Fin finning is obtained by laminating an aluminum or copper strip with a double “LL” fold on the tube, forming a flat helical fin.
The clamping is by tightening adjustment, completely covering the tube for efficient heat exchange and corrosion protection.
Suitable for temperatures up to 176°C, the LL-Fin offers improvements in clamping and stability over the L-Fin, making them ideal for heat exchangers and cooling and heating systems.
Tube Material:
Ferrous, non-ferrous, and some alloys
Fin Material:
Aluminum-Copper.
Tube Diameter:
12.7mm-50.8mm
Type of service:
Corrosive Applications
Maximum Working Temperature:
Up to 176°C (350°F)
KL-Fin finning enhances the L-Fin and LL-Fin designs by incorporating knurling on both the tube surface and the fin foot. This knurling improves the grip between the tube and the fin, resulting in a stronger and more stable bond, which enhances thermal performance.
KL-Fin tubes are ideal for applications requiring high thermal efficiency and mechanical strength. They are commonly used in heat exchangers, condensers, and cooling and heating systems.
Tube Material:
Ferrous, non-ferrous and some alloys.
Fin Material:
Aluminum-Copper.
Tube Diameter:
12.7mm-50.8mm.
Type of service:
Severe service.
Maximum Working Temperature:
Up to 260°C (500°F)
The perforated fin enhances L-Fin, LL-Fin, and G-Fin designs by incorporating perforations that increase airflow through the fins, significantly improving heat exchange. This process does not result in material loss and facilitates better airflow, thus boosting efficiency.
Perforated fins are ideal for heat exchangers, radiators, and other cooling or heating systems where high thermal efficiency is required.
Tube Material:
Ferrous, non-ferrous and some alloys.
Fin Material:
Available for G-Fin, L-Fin, LL-Fin aluminum or copper.
Tube Diameter:
12.7mm-50.8mm
Type of service:
Light duty, high temperatures, severe service and corrosive applications.
Maximum Working Temperature:
The primary fin selection determines the temperature.
176°C – 540°C (350°F – 1000°F)
The AEROFIN finning creates a continuous helical fin with a corrugated, tension-fastened base at the ends of the tube.
This configuration allows for a larger contact surface and thermal efficiency.
Used in various industrial applications such as dryers, economizers, evaporators and furnaces, AEROFINs are known for their versatility and ability to operate efficiently in different environments.
Tube Material:
Carbon steels, Stainless steels, Aluminum, Copper,
Brass.
Fin Material:
Carbon steels, Stainless steels, Aluminum, Copper.
Tube Diameter:
10mm and up
Type of service:
Severe service.
Maximum Working Temperature:
Up to 176°C (350°F)
The SOLDAFIN finned tube features a continuous helical fin with a flat support base, applied directly onto the surface of the base tube using laser welding. This welding process can be performed with or without filler material, depending on the customer’s specifications.
SOLDAFIN tubes are utilized in a wide range of industrial applications, including dryers, boilers, furnaces, and economizers. Their robust design and precise welding ensure efficient heat transfer along with high resistance to pressure and corrosion.
Tube Material:
Carbon steels, Stainless steels.
Fin Material:
Carbon steels, Stainless steels.
Tube Diameter:
10mm upwards.
Type of service:
Severe service.
Maximum Working Temperature:
+ 260°C (500°F)
Similar to the SoldaFin, but with serrated fins that are formed by cuts in the strap before forming the fin.
Laser welding ensures a solid and durable bond.
The toothing reduces dirt build-up, improving thermal efficiency and reducing maintenance, ideal for dryers, boilers and ovens.
Tube Material:
Carbon Steels, Stainless Steels
Fin Material:
Carbon Steels, Stainless Steels
Tube Diameter:
10mm and up
Type of service:
Severe service
Maximum Working Temperature:
+ 260°C (500°F)
These finned tubes enhance the heat exchange surface by adding longitudinal fins, which are attached using spray welding. This design maximizes the contact surface area, thereby improving thermal efficiency.
Ideal for use in evaporators and regasifiers, these tubes are engineered to handle high levels of heat without compromising the integrity of the tube or the efficiency of heat exchange.
Tube Material:
Carbon Steels, Stainless Steels
Fin Material:
Carbon Steels, Stainless Steels
Tube Diameter:
10mm and up
Type of service:
Severe service
Maximum Working Temperature:
+ 260°C (500°F)
The studded tube increases the heat exchange surface by spot welding studs onto its outer surface. This robust joint design ensures efficient heat transfer and durability under demanding operating conditions.
Studded tubes are commonly used in furnaces and boilers. They are particularly well-suited for harsh environments with high levels of soiling or corrosion, while still maintaining efficient heat transfer.
Tube Material:
Carbon steels, Stainless steels.
Fin Material:
Carbon Steels, Stainless Steels
Tube Diameter:
Up to 10 inches.
Type of service:
Severe service.
Maximum Working Temperature:
+ 260°C (500°F)
In addition to offering an extensive line of straight-length finned tubes for heat transfer, we offer components manufactured from finned tubes in a variety of configurations.
They can be: Cylindrical coils, Conical coils, Rectangular coils, Flat coils, Radiators.
The Streamer Models
COILS TAT / AGRALE / SERVIVAC and COILS DEUTZ F3L / DEUTZ F4L / F5L / F6L (3,4,5 and 6 cylinder DEUTZ engine)
Shell and coils heat exchangers.
Evaporators.
Today, we are a supplier of oil cooling coils for tractors, stationary engines and DEUTZ machinery, and compressed air cooling coils for AGRALE and TATSA buses.
Quality Controls
Mraz finned offers hydraulic testing with pressures up to 700 BAR, and pneumatic underwater testing up to 20 bar.
At Mraz Aletados SRL, we manufacture forged plugs and header gaskets for air coolers, designed to seal the openings in the headers, allowing for inspection, cleaning, and maintenance.
We comply with the material specifications of ASME Section VIII and the threading standards of ASME B16.11, ensuring the durability and reliability of our products, which are essential for maintaining efficiency across various industries, including automotive, petrochemical, and manufacturing.
We offer custom manufacturing and each unit includes quality and traceability certificates.
Available materials: Carbon steels and stainless steels.
Our spacer rings are specifically designed to maintain consistent and accurate spacing between finned tubes in heat exchangers.
Made from galvanized steel, these rings offer exceptional corrosion resistance, ensuring durability and optimal performance in demanding environments.
Each ring consists of two halves that are easily fastened together, allowing for quick and secure installation.
This design facilitates both maintenance and assembly of thermal exchange systems, ensuring maximum operational efficiency.
To place an order, please send us the following information:
– Tube diameter
– Outer diameter of the ring (pitch)
At Mraz Aletados SRL, we manufacture forged plugs and header gaskets for air coolers, designed to seal the openings in the headers, allowing for inspection, cleaning, and maintenance.
We comply with the material specifications of ASME Section VIII and the threading standards of ASME B16.11, ensuring the durability and reliability of our products, which are essential for maintaining efficiency across various industries, including automotive, petrochemical, and manufacturing.
We offer custom manufacturing, and each unit includes quality and traceability certificates.
The L-FIN finning is achieved from an aluminum or copper strip, which is folded to obtain a characteristic L-profile<>. The attachment of this flap to the tube is of the tightening fit type. They are suitable for applications with temperatures up to 176ºC, guaranteeing optimal performance under controlled working conditions.
Its main characteristic is that the outer diameter of the finned tube is equal to or slightly less than the diameter of the tube. For heat exchangers, hull and tube.
The MEDIUM-FIN finning is a type of integral finning with fins formed from the same tube.
The diameter of the finned section will depend on the tube material and the desired fin height.
MEDIUM-FIN finned tubes are found in a variety of applications, including condensers, co-axial condensers, heating coils, and coils for cooling compressed air, oil, and solvents.
HIGH-FIN finning features a continuous helical design, where the fins are integrally formed from the same tube material. HIGH-FIN finned tubes are used in a variety of applications, including water heaters, oil coolers, water systems, solvent systems, and both compressed air and air coolers
Longitudinal integral finning involves using an extruded aluminum profile to form fins, resulting in a single-piece construction where the tube and fins are seamlessly integrated. This design ensures superior heat transfer efficiency and enhanced durability compared to other finning methods. Extruded longitudinal integral finned tubes are well-suited for a variety of applications, including evaporators and regasifiers.
Finned integral corrugated surface tubes are produced through a helical embossing process on the tube wall, achieved via cold rolling. The distinctive feature of these pipes is their wavy surface, which enhances turbulence in the fluid flowing through them. Finned integral corrugated surface pipes are ideal for use in chillers, coaxial exchangers, coils, and shell-and-tube heat exchangers.
G-FIN finning is achieved by rolling an aluminum or copper strip onto the outer surface of a tube to form a flat helical fin. During the lamination process, the base of the fin is inserted into a slit and then securely closed, ensuring optimal clamping. This type of finned tube is commonly used in heat exchangers, cooling and heating systems, and other applications where high thermal performance and resistance to elevated temperatures are essential.
The LL-FIN finning is achieved from an aluminum or copper strip, which is double-folded to obtain its characteristic LL> profile<.
The attachment of this fin to the tube is done by means of a tightening adjustment, where the foot of the fin completely covers the surface of the tube.
This ensures not only efficient heat exchange, but also firm clamping and corrosion protection.
Our separator rings are specifically designed to maintain consistent and precise spacing between finned tubes in heat exchangers.
Made from galvanized steel, these rings offer exceptional corrosion resistance, ensuring durability and optimal performance in demanding environments.
Each ring consists of two halves that easily snap together, allowing for quick and secure installation. This design facilitates both maintenance and assembly of thermal exchange systems, ensuring maximum operational efficiency.
The KL-FIN finning is an improvement applied to the L-Fin and LL-Fin finned tubes, where a knurling is performed on the surface of the tube and on the foot of the fin.
They are recognized for their superior heat transfer performance, thanks to the mechanical improvement in the bonding of the fin material to the tube surface.
They are a preferred choice for heat exchangers, condensers, evaporators, and cooling and heating systems.
The PERFORATED FIN is an enhancement applicable to L-FIN, LL-FIN, and G-FIN finned tubes. It involves perforating the fins to improve air flow through them, significantly enhancing heat exchange.This technique improves thermal efficiency by allowing better air circulation and increasing the effective heat transfer surface.
AEROFIN finning is a type of filler finning that features a continuous helical fin supported by a corrugated base. One of the key advantages of this finning type is its versatility, as it can accommodate nearly any material for both the tube and the fin. AEROFIN finned tubes are used in various industrial applications that demand high thermal efficiency and resistance to challenging conditions.
LONGITUDINAL FINNED tubes are distinguished by the addition of fins arranged longitudinally along the length of the tube, which expands the heat exchange surface. This longitudinal fin design maximizes the contact area between the hot fluid and the tube, significantly enhancing heat exchange efficiency. These tubes are an ideal choice for industrial applications that require high thermal efficiency and long-term durability.
The STUDDED tube is characterized by an enlarged heat exchange surface on the outer side, achieved by welding studs onto its surface. The addition of studs increases the contact area for heat transfer, which is especially beneficial in applications where the external fluid tends to foul or corrode the heat exchange surface. Studded tubes are commonly used in furnaces and boilers, where the fuels employed can cause significant dirt accumulation or corrosion.
The Serrated Soldafin finned tube is similar to the standard Soldafin but features a serrated helical fin instead of a flat one. The serrated fin significantly reduces dirt build-up, which enhances thermal efficiency and decreases maintenance requirements. These tubes are ideal for use indryers, boilers, furnaces, and economizers.
The Soldafin finned tube is a type of finned tube in which a continuous helical fin with a flat support base is applied directly onto the surface of the base tube using laser welding. This type of tube is used in a variety of industrial applications, including dryers, boilers, furnaces, and economizers. Its robust design and precise welding ensure efficient heat transfer and high resistance to pressure and corrosion..
Este tipo de tubos se utilizan en una variedad de aplicaciones industriales, incluyendo secaderos, calderas, hornos y economizadores, entre otros.
Su diseño robusto y la soldadura precisa garantizan una transferencia de calor eficiente y una alta resistencia a la presión y la corrosión.
LOW-FIN finning is a type of integral finning in which the fin is formed from the same tube without adding additional material.
When the fin is formed, part of the thickness of the tube wall is used, resulting in a reduction of the wall in the finned section.
LOW-FIN finned tubes are used in hull and tube, gas-gas and liquid-gas exchangers.