In modern industrial production, improving heat exchange efficiency and reducing energy consumption are core goals of industrial upgrading. Heat transfer components, as the core of heat exchange systems, directly determine the efficiency, stability and service life of the entire system. Traditional finned tubes, such as inserted finned tubes and bonded finned tubes, often have problems such as poor interface bonding, large contact thermal resistance, easy fin detachment and low structural stability, which are difficult to meet the high-efficiency, high-reliability and large-scale production needs of modern industrial heat exchange systems.

High-frequency welded finned tubes, as an advanced high-efficiency heat transfer component, solve the defects of traditional finned tubes through the unique high-frequency welding process. The core principle is to use high-frequency alternating current (usually 100kHz-1MHz) to generate induced current on the surface of the base tube and fin strip, relying on the skin effect to concentrate the current on the surface of the contact interface, and the proximity effect to enhance the current density at the contact point, thereby rapidly heating the interface to the melting point in a short time (milliseconds to seconds). Under the action of a certain pressure, the molten metal at the interface fuses to form a metallurgical bond, realizing the tight connection between the fin and the base tube. This welding method not only ensures the bonding strength between the fin and the base tube, but also avoids the damage to the material structure caused by excessive heating, maintaining the excellent mechanical and thermal properties of the base material.

 

At present, high-frequency welded finned tubes have been widely used in petrochemical, power generation, metallurgy, refrigeration and air conditioning, waste heat recovery and other fields, and their manufacturing technology and application scenarios are constantly enriched and improved. With the continuous development of high-frequency welding technology, the performance of HFW finned tubes has been further optimized, and their application scope has been expanded to more harsh working environments (such as high temperature, high pressure, strong corrosion). For practitioners, a systematic understanding of the classification, manufacturing process, application scenarios and performance influencing factors of high-frequency welded finned tubes is the basis for rational selection, design and application. This paper focuses on the core technology of HFW finned tubes, systematically sorts out their classification, manufacturing process, application scenarios and technical development trends, and combines industry standards and practical engineering experience to provide a comprehensive technical analysis, helping practitioners avoid technical mistakes and improve the efficiency and reliability of heat exchange systems.

 

 

 

High-frequency welded finned tubes can be classified into different types according to base tube material, fin type, welding structure and application conditions. Each type has its own unique structural characteristics, mechanical properties and heat transfer performance, which are suitable for different industrial heat exchange scenarios. The detailed classification is as follows, providing a scientific basis for the selection of high-frequency welded finned tubes.

 

 

The base tube material of high-frequency welded finned tubes directly determines its high-temperature resistance, corrosion resistance, mechanical strength and thermal conductivity, and is selected according to the working temperature, pressure and corrosive environment of the heat exchange system. Common base tube materials include carbon steel, alloy steel, stainless steel, copper and copper alloy, and aluminum and aluminum alloy.

 

- Carbon Steel Base HFW Finned Tubes: The base tube is made of carbon steel (such as 20# steel, 10# steel, Q235B), which has the advantages of low cost, good mechanical strength, easy welding and high production efficiency. It is suitable for low and medium-temperature (below 450℃), low and medium-pressure and non-corrosive or slightly corrosive working environments, such as ordinary industrial boilers, waste heat recovery pipelines, low-temperature heat exchangers and air-cooled condensers. The disadvantage is poor high-temperature oxidation resistance and corrosion resistance, which needs anti-corrosion treatment (such as galvanizing, painting) when used in corrosive environments.

 

- Alloy Steel Base HFW Finned Tubes: The base tube is made of alloy steel (such as 15CrMo, 12Cr1MoV, 30CrMo), which is added with alloying elements such as chromium, molybdenum and vanadium to improve its high-temperature resistance, corrosion resistance and creep resistance. It is suitable for medium and high-temperature (450-650℃), medium and high-pressure working environments, such as petrochemical reactors, thermal power plant superheaters, high-temperature waste heat recovery systems and metallurgical furnace heat exchangers.

 

- Stainless Steel Base HFW Finned Tubes: The base tube is made of stainless steel (such as 304, 316L, 321, 310S), which has excellent corrosion resistance, high-temperature oxidation resistance and mechanical properties. It is suitable for high-temperature (up to 800℃), high-pressure and strong corrosive working environments, such as nuclear power plant heat exchangers, chemical industry corrosion-resistant heat exchangers, marine heat exchange systems and pharmaceutical equipment. The disadvantage is high cost, which limits its application in ordinary industrial scenarios.

 

- Non-ferrous Metal Base HFW Finned Tubes: Including copper and copper alloy base, aluminum and aluminum alloy base finned tubes. Copper base HFW finned tubes have excellent thermal conductivity (thermal conductivity up to 401 W/(m·K)), suitable for low-temperature (below 200℃) heat exchange scenarios such as refrigeration and air conditioning, cold storage and cryogenic equipment. Aluminum base HFW finned tubes have the advantages of light weight, low cost, good corrosion resistance and high thermal conductivity, suitable for air-cooled heat exchangers, automotive radiators and low-temperature waste heat recovery systems.

 

 

The fin type of high-frequency welded finned tubes directly affects the heat transfer area, fluid resistance and heat transfer efficiency. According to the cross-sectional shape, structure and arrangement of the fin, it can be divided into spiral fin, straight fin, serrated fin, corrugated fin and variable-pitch fin.

 

- Spiral High-Frequency Welded Finned Tubes: The fin is wound around the base tube in a spiral shape, which is the most widely used type of HFW finned tubes. It can enhance the turbulence of the fluid, reduce the boundary layer thickness, improve the heat transfer efficiency, and reduce the fluid resistance. It is suitable for high-velocity fluid heat exchange scenarios, such as high-temperature flue gas heat exchangers, gas-liquid heat exchangers and petrochemical heat exchangers. The fin pitch is usually 2-20 mm, and the fin height is 5-50 mm, which can be adjusted according to the heat transfer requirements.

 

- Straight High-Frequency Welded Finned Tubes: The fin is arranged vertically or horizontally on the base tube in a straight line, with simple structure, easy manufacturing and large heat transfer area. It is suitable for low-velocity fluid heat exchange scenarios, such as low-velocity air-cooled heat exchangers, low-temperature liquid heat exchangers and household air conditioners. The disadvantage is that the fluid resistance is relatively large, and the heat transfer efficiency is not as high as that of spiral fins.

 

- Serrated High-Frequency Welded Finned Tubes: The fin edge is serrated, which can break the fluid boundary layer, enhance the heat transfer effect and reduce the fluid resistance. Compared with straight and spiral fins, it has higher heat transfer efficiency (15-25% higher than spiral fins) and is suitable for high-heat-flux and high-velocity fluid heat exchange scenarios, such as high-temperature waste heat recovery boilers, gas turbines and automotive exhaust heat exchangers.

 

- Corrugated High-Frequency Welded Finned Tubes: The fin surface is corrugated, which can increase the heat transfer area and enhance the fluid turbulence, further improving the heat transfer efficiency. It is suitable for scenarios where the heat transfer requirement is high and the fluid resistance is allowed, such as petrochemical heat exchangers, refrigeration condensers and large-scale air-cooled heat exchangers.

 

- Variable-Pitch High-Frequency Welded Finned Tubes: The fin pitch is not uniform, and the pitch is adjusted according to the fluid flow and heat transfer requirements (dense pitch in the high-heat-flux area, sparse pitch in the low-heat-flux area). It can balance the heat transfer efficiency and fluid resistance, and is suitable for complex heat exchange scenarios where the fluid parameters change greatly, such as multi-stage heat exchangers and waste heat recovery systems with variable flue gas temperature.

 

 

According to the welding position and structure of the fin and base tube, high-frequency welded finned tubes can be divided into external welded finned tubes, internal welded finned tubes and internal-external double welded finned tubes.

 

- External High-Frequency Welded Finned Tubes: The fin is welded on the outer surface of the base tube, which is the most common structure. It is mainly used to enhance the heat transfer of the tube outer wall, such as in air-cooled heat exchangers, flue gas waste heat recovery systems and gas-liquid heat exchangers. The advantages are simple manufacturing process, high production efficiency and large heat transfer area.

 

- Internal High-Frequency Welded Finned Tubes: The fin is welded on the inner surface of the base tube, which is used to enhance the heat transfer of the tube inner wall, such as in liquid-liquid heat exchangers, high-pressure boilers and refrigeration evaporators. The advantages are high heat transfer efficiency, compact structure and strong adaptability to high-pressure environments. The disadvantage is complex manufacturing process and high technical requirements.

 

- Internal-External Double High-Frequency Welded Finned Tubes: Fins are welded on both the inner and outer surfaces of the base tube, which can enhance the heat transfer of both the inner and outer walls at the same time. It is suitable for scenarios where both internal and external heat transfer need to be enhanced, such as high-efficiency waste heat recovery systems, nuclear power plant heat exchangers and high-pressure heat exchangers. The disadvantage is complex manufacturing process, high cost and high requirements for welding quality.

 

 

According to the working temperature, pressure and fluid medium of the application scenario, high-frequency welded finned tubes can be divided into low-temperature type, medium-temperature type and high-temperature type.

 

- Low-Temperature HFW Finned Tubes: Suitable for working temperature below 200℃, mainly used in refrigeration and air conditioning, cold storage, food processing and low-temperature waste heat recovery fields. The base tube is usually made of copper, aluminum or carbon steel, and the fin is made of aluminum or copper.

 

- Medium-Temperature HFW Finned Tubes: Suitable for working temperature between 200-450℃, mainly used in ordinary industrial boilers, petrochemical refining, metallurgical waste heat recovery and air-cooled power generation fields. The base tube is usually made of carbon steel or ordinary alloy steel, and the fin is made of carbon steel or alloy steel.

 

- High-Temperature HFW Finned Tubes: Suitable for working temperature above 450℃, mainly used in thermal power plant superheaters, petrochemical high-temperature reactors, nuclear power plant heat exchangers and metallurgical furnace heat exchangers. The base tube is usually made of high-temperature alloy steel or stainless steel, and the fin is made of high-temperature alloy steel.

 

 

 

The manufacturing process of high-frequency welded finned tubes is the core factor determining the welding quality, heat transfer performance and structural stability of the product. The core process is the high-frequency welding process, which involves pre-processing of base tube and fin, high-frequency welding, post-welding treatment and quality inspection. Each link has strict technical requirements, and the rational setting of process parameters directly affects the final product quality. The detailed manufacturing process is as follows:

 

 

Pre-processing is the foundation to ensure the welding quality of high-frequency welded finned tubes, including surface treatment of base tube and fin strip, cutting and forming of fin strip, and pre-straightening of base tube.

 

- Surface Treatment: The contact surfaces of the base tube and fin strip must be cleaned and derusted to remove oil, rust, oxide scale, moisture and other impurities, ensuring the surface roughness meets the requirements (usually Ra 1.6-6.3 μm). Common surface treatment methods include sandblasting, pickling, phosphating and mechanical polishing. Sandblasting is the most widely used method, which can not only remove impurities, but also increase the surface roughness of the contact interface, enhance the wettability of the molten metal and improve the welding strength.

 

- Fin Strip Cutting and Forming: The fin strip is cut from the raw material (such as steel plate, aluminum plate, copper plate) according to the designed width, thickness and length. For spiral fins, serrated fins and corrugated fins, it is necessary to form the fin strip through rolling or stamping. The dimensional accuracy of the fin strip (width, thickness, pitch) must meet the design requirements, and the surface of the fin strip should be smooth, free of cracks, burrs and other defects. The edge of the fin strip should be processed to ensure good contact with the base tube.

 

- Pre-Straightening of Base Tube: The base tube needs to be pre-straightened to ensure its straightness (the straightness deviation should not exceed 0.5 mm/m), avoiding the uneven contact between the fin strip and the base tube during welding, which will affect the welding quality. Pre-straightening is completed by a professional straightening machine, and the straightened base tube should be free of bending, deformation and other defects.

 

 

The high-frequency welding process is the key link of manufacturing high-frequency welded finned tubes, which is to realize the metallurgical bonding between the fin strip and the base tube through high-frequency current heating. The process is completed by a professional high-frequency welding machine, and the key technologies include high-frequency welding principle, welding equipment, key process parameters and welding operation.

 

 

High-frequency welding relies on the skin effect and proximity effect of high-frequency alternating current. When high-frequency current passes through the induction coil, an alternating magnetic field is generated around the coil. The base tube and fin strip in the magnetic field induce eddy current, and due to the skin effect, the eddy current is concentrated on the surface of the base tube and fin strip (the depth of the skin effect is usually 0.1-0.5 mm). At the same time, due to the proximity effect, the eddy current density at the contact interface between the fin strip and the base tube is significantly increased, resulting in rapid heating of the interface to the melting point (1300-1500℃ for steel) in a short time. Under the action of a certain pressure (usually 5-20 MPa), the molten metal at the interface fuses and forms a continuous, dense weld seam after cooling, realizing the metallurgical bonding between the fin and the base tube.

 

 

The main equipment for high-frequency welding of finned tubes includes high-frequency generator, induction coil, welding pressure device, feeding device, winding device (for spiral fins) and cooling device. The high-frequency generator is used to generate high-frequency alternating current (100kHz-1MHz), which is the core of the welding equipment. The induction coil is used to generate an alternating magnetic field, and its shape and size are designed according to the diameter of the base tube and the size of the fin. The welding pressure device is used to apply a certain pressure to the fin strip and base tube to ensure the tight contact between the interface and the formation of a good weld seam. The feeding device is used to feed the fin strip into the welding area at a uniform speed, and the winding device is used to wind the fin strip around the base tube in a spiral shape (for spiral finned tubes). The cooling device is used to cool the weld seam rapidly after welding, avoiding the formation of coarse grains and improving the mechanical properties of the weld seam.

 

 

The key process parameters of high-frequency welding include high-frequency current frequency, welding power, welding speed, welding pressure and cooling speed, which directly affect the welding quality and heat transfer performance of the finned tube.

 

- High-Frequency Current Frequency: The frequency is usually 100kHz-1MHz. A higher frequency can make the eddy current more concentrated on the surface of the contact interface, improve the heating efficiency and welding quality, but the equipment cost is higher. A lower frequency will lead to the diffusion of eddy current, uneven heating and poor welding quality. The frequency is selected according to the material and thickness of the base tube and fin strip.

 

- Welding Power: The welding power is determined according to the material, thickness and welding speed of the base tube and fin strip, usually ranging from 50kW to 500kW. Too small power will lead to insufficient heating of the interface, incomplete fusion and poor welding strength; too large power will cause overheating of the material, burn-through of the weld seam and damage to the material structure.

 

- Welding Speed: The welding speed is usually 1-10 m/min. A higher welding speed can improve production efficiency, but it requires matching with the welding power and frequency to ensure sufficient heating of the interface. Too fast welding speed will lead to insufficient heating, incomplete fusion and poor welding quality; too slow welding speed will cause overheating, increase production cost and affect production efficiency.

 

- Welding Pressure: The welding pressure is usually 5-20 MPa. A reasonable pressure can ensure the tight contact between the fin strip and the base tube, promote the fusion of molten metal and eliminate the gaps at the interface. Too small pressure will lead to loose bonding, large contact thermal resistance and poor welding strength; too large pressure will cause deformation of the fin strip and base tube, affecting the structural accuracy.

 

- Cooling Speed: The cooling speed after welding is usually 10-50℃/s. Rapid cooling can refine the grain structure of the weld seam, improve the mechanical properties of the weld seam and avoid the formation of cracks. The cooling method usually adopts water cooling or air cooling, and the cooling speed is adjusted according to the material of the base tube and fin strip.

 

 

After the high-frequency welding process is completed, post-welding treatment is required to eliminate residual stress, improve the welding strength and surface quality of the finned tube, and ensure the performance of the product. Common post-welding treatment methods include heat treatment, surface anti-corrosion treatment and trimming.

 

- Heat Treatment: Heat treatment is mainly used to eliminate the residual stress generated during the welding process, improve the welding strength and toughness of the weld seam, and enhance the mechanical properties of the finned tube. The heat treatment process includes annealing, normalizing and tempering. The temperature and time of heat treatment are determined according to the material of the base tube and fin. For example, carbon steel HFW finned tubes are usually annealed at 600-700℃ for 2-4 hours, then cooled slowly to room temperature; stainless steel HFW finned tubes are usually solution treated at 1050-1150℃ for 1-2 hours, then water-cooled to room temperature.

 

- Surface Anti-Corrosion Treatment: For finned tubes used in corrosive environments, surface anti-corrosion treatment is required to improve their corrosion resistance and service life. Common anti-corrosion treatment methods include galvanizing, chrome plating, spray coating (such as ceramic coating, polymer coating), chemical conversion coating and passivation treatment. The selection of anti-corrosion method is determined according to the corrosive medium and working environment.

 

- Trimming: After welding and heat treatment, the two ends of the finned tube may have uneven fins, burrs or excess weld seam, which need to be trimmed to ensure the dimensional accuracy and surface quality of the finned tube. Trimming is completed by a professional trimming machine, and the trimmed finned tube should meet the design requirements of length and end flatness.

 

 

Quality inspection is an important link to ensure the product quality of high-frequency welded finned tubes, including dimensional inspection, welding quality inspection, surface quality inspection and mechanical performance inspection.

 

- Dimensional Inspection: Inspect the key dimensions of the finned tube, including base tube diameter, wall thickness, fin width, fin thickness, fin pitch, total length and straightness. The dimensional deviation should meet the relevant industry standards (such as GB/T 15386-2017, ASTM A179/A179M). Common inspection tools include calipers, micrometers, tape measures, pitch gauges and straightness meters.

 

- Welding Quality Inspection: Welding quality inspection includes visual inspection, non-destructive testing and weld seam strength inspection. Visual inspection is used to check the appearance of the weld seam (such as weld seam continuity, uniformity, no cracks, pores and burn-through). Non-destructive testing includes ultrasonic testing, radiographic testing and magnetic particle testing, which are used to detect internal defects (such as incomplete fusion, cracks, pores) and surface defects of the weld seam. Weld seam strength inspection is carried out by pull-off test or shear test, and the pull-off force or shear force should meet the design requirements, and there should be no fin detachment or weld seam fracture during the test.

 

- Surface Quality Inspection: Inspect the surface of the finned tube for cracks, burrs, rust, oil stains and other defects. The fin surface should be smooth, the weld seam should be uniform and continuous, and there should be no loose or warped fins.

 

- Mechanical Performance Inspection: For high-demand finned tubes, mechanical performance inspection is required, including tensile strength, yield strength, elongation and hardness test. The mechanical performance of the finned tube (especially the weld seam) should meet the design requirements and relevant industry standards.

 

 

 

High-frequency welded finned tubes, with their high welding strength, high heat transfer efficiency, compact structure, cost-effectiveness and high production efficiency, are widely used in various industrial fields that require efficient heat exchange. Their application fields cover petrochemical, power generation, metallurgy, refrigeration and air conditioning, waste heat recovery and other industries. The specific application scenarios are as follows, combined with practical engineering cases to illustrate their application advantages and key technical requirements.

 

 

The petrochemical industry involves a large number of heat exchange processes, with harsh working conditions (high temperature, high pressure, corrosive media) and high requirements for heat transfer efficiency and reliability. High-frequency welded finned tubes are widely used in reactors, heat exchangers, condensers, evaporators and waste heat recovery systems of petrochemical plants.

 

- Petrochemical Heat Exchangers: In the refining, cracking, hydrogenation and other processes of petrochemical plants, high-frequency welded finned tubes are used as the core heat transfer components of heat exchangers to transfer heat between process fluids. For example, in a catalytic cracking unit, alloy steel spiral high-frequency welded finned tubes are used in the flue gas heat exchanger, which can withstand high temperature (up to 600℃) and corrosive flue gas, the heat transfer efficiency is improved by 30-40% compared with traditional welded finned tubes, and the service life is extended by more than 1.5 times. The high welding strength ensures that the fin does not detach under high vibration and thermal shock conditions.

 

- Waste Heat Recovery Systems: A large amount of high-temperature flue gas (temperature 500-800℃) is generated in the petrochemical production process. High-frequency welded finned tubes are used in the flue gas waste heat recovery boiler to recover the waste heat, generate steam for power generation or heating, improving energy utilization efficiency and reducing environmental pollution. For example, in a large petrochemical refinery, the waste heat recovery system adopts stainless steel serrated high-frequency welded finned tubes, the waste heat recovery efficiency reaches 70% or more, and the annual energy saving is about 8,000 tons of standard coal.

 

 

The power generation industry (thermal power, nuclear power, biomass power) has high requirements for heat exchange efficiency and reliability of heat transfer components, and the working environment is usually high temperature and high pressure. High-frequency welded finned tubes are widely used in boilers, superheaters, economizers, air preheaters and waste heat recovery systems of power plants.

 

- Thermal Power Plant Boilers: In thermal power plants, high-frequency welded finned tubes are used in the economizer, air preheater and superheater of boilers. The economizer uses carbon steel or alloy steel high-frequency welded finned tubes to recover the waste heat of flue gas, heat the feed water, improve the boiler efficiency; the air preheater uses spiral high-frequency welded finned tubes to heat the combustion air with flue gas waste heat, enhance the combustion efficiency; the superheater uses high-temperature alloy steel high-frequency welded finned tubes to heat the saturated steam into superheated steam, improving the power generation efficiency. For example, in a 600MW thermal power plant, the economizer adopts alloy steel spiral high-frequency welded finned tubes, which increases the heat transfer area by 3-5 times compared with smooth tubes, and the boiler efficiency is improved by 2-3%.

 

- Nuclear Power Plant Heat Exchangers: Nuclear power plants require heat transfer components to have excellent corrosion resistance, radiation resistance and structural stability. Stainless steel high-frequency welded finned tubes are used in the primary circuit heat exchanger and secondary circuit heat exchanger of nuclear power plants, to transfer the heat generated by nuclear fission to the working fluid, ensuring the safe and stable operation of the nuclear power plant. The weld seam of the finned tube is required to be dense and defect-free, and the bonding strength is high, which can withstand long-term high-temperature and high-pressure operation.

 

 

The metallurgical industry (steel, non-ferrous metals) generates a lot of high-temperature waste heat during the smelting process, and the working environment is harsh (high temperature, high dust, corrosive flue gas). High-frequency welded finned tubes are widely used in the waste heat recovery and cooling systems of metallurgical furnaces.

 

- Metallurgical Furnace Waste Heat Recovery: In steel plants, blast furnaces, converter furnaces and electric furnaces generate a large amount of high-temperature flue gas (temperature 600-1000℃). High-frequency welded finned tubes are used in the flue gas waste heat recovery boiler to recover the waste heat, generate steam for power generation or heating, reducing energy consumption. For example, in a blast furnace flue gas waste heat recovery system, high-temperature alloy steel spiral high-frequency welded finned tubes are used, which have good high-temperature oxidation resistance and dust wear resistance, and the waste heat recovery efficiency reaches 65% or more.

 

- Metallurgical Equipment Cooling: High-frequency welded finned tubes are used in the cooling systems of metallurgical equipment (such as blast furnace cooling walls, converter cooling water pipes) to transfer the heat of the equipment to the cooling water, ensuring the safe operation of the equipment. The finned tubes used in this scenario require strong resistance to vibration and thermal shock, and the high welding strength ensures that the fin does not detach under harsh working conditions.

 

 

The refrigeration and air conditioning industry requires heat transfer components to have high heat transfer efficiency, compact structure, light weight and cost-effectiveness. High-frequency welded finned tubes (mainly copper base and aluminum base) are widely used in air conditioners, refrigerators, cold storage and other equipment.

 

- Air Conditioners: In central air conditioners and household air conditioners, aluminum or copper high-frequency welded finned tubes are used in evaporators and condensers. The spiral high-frequency welded finned tubes have high heat transfer efficiency and compact structure, which can reduce the volume and weight of the air conditioner, improve the energy efficiency ratio. For example, in a central air conditioning system, aluminum spiral high-frequency welded finned tubes are used in the condenser, the heat transfer efficiency is improved by 15-25% compared with traditional inserted finned tubes, and the energy efficiency ratio is increased by 10-12%.

 

- Cold Storage and Refrigeration Equipment: In cold storage and refrigeration equipment, copper base high-frequency welded finned tubes are used in the evaporator to transfer the cold energy, ensuring the refrigeration effect. The copper finned tubes have excellent thermal conductivity and corrosion resistance, suitable for low-temperature and humid environments. The high welding strength ensures that the fin does not detach during long-term operation.

 

 

In addition to the above fields, high-frequency welded finned tubes are also widely used in marine engineering, automotive industry, food processing and other fields:

 

- Marine Engineering: Marine environments are highly corrosive (saltwater corrosion). Stainless steel or copper alloy high-frequency welded finned tubes are used in marine heat exchangers (such as seawater cooling heat exchangers, marine boiler heat exchangers) to transfer heat, ensuring the normal operation of marine equipment and resisting seawater corrosion. The compact structure of HFW finned tubes is suitable for the limited space of marine equipment.

 

- Automotive Industry: In automotive radiators, intercoolers and exhaust heat recovery systems, aluminum high-frequency welded finned tubes are used, which have the advantages of light weight, high heat transfer efficiency and cost-effectiveness. For example, automotive radiators adopt aluminum straight high-frequency welded finned tubes, which can effectively reduce the weight of the radiator and improve the heat dissipation efficiency of the engine.

 

- Food Processing: In food processing industry (such as beverage sterilization, food drying), low-temperature high-frequency welded finned tubes are used in heat"