Heat Exchanger Finned Tubes Suppliers in China
At Datang, we specialize in engineering and manufacturing high-efficiency heat exchanger finned tubes designed to optimize thermal performance in the most demanding industrial environments. As a leading supplier, Datang provides customized finning solutions that increase surface area, reduce equipment footprint, and significantly enhance heat transfer coefficients.
Why Choose Datang Finned Tubes?
With decades of expertise in heat transfer technology, Datang products are built to international standards (ASTM, ASME, DIN, EN). Our finned tubes are the preferred choice for Air Cooled Heat Exchangers (ACHE), boilers, and condensers worldwide.
Heat exchanger finned tubes are specialized components designed to maximize the efficiency of thermal energy transfer by increasing the surface area of a base tube. They are essential in applications where one heat transfer medium (usually air or gas) has a much lower heat transfer coefficient than the other (usually a liquid like water or oil).
What are Finned Tubes?
Core Functionality
In a standard smooth tube, the rate of heat transfer is limited by the surface area. By adding fins—thin metal plates or wires—to the exterior of the tube, the effective surface area is increased by 5 to 20 times.
This is particularly critical in Air-Cooled Heat Exchangers (ACHE). Because air is a poor conductor of heat, the extra surface area provided by the fins allows the equipment to dissipate heat much more effectively without needing to increase the overall footprint of the unit.
Common Types of Finned Tubes
The method of attaching the fin to the tube determines the thermal efficiency, pressure rating, and corrosion resistance of the component.
| Type | Manufacturing Method | Key Characteristics |
| Extruded | An aluminum muff is cold-rolled onto a base tube. | Excellent heat transfer; 100% fin-to-tube bond; high corrosion protection for the base tube. |
| L-Foot | A thin aluminum strip is tension-wound into an “L” shape and wrapped around the tube. | Cost-effective; suitable for lower-temperature applications; provides some surface protection. |
| G-Type (Embedded) | A groove is cut into the tube wall, the fin is placed inside, and the metal is back-filled. | High thermal stability; can handle high temperatures and mechanical stress. |
| High-Frequency Welded (HFW) | Fins are spirally wound and resistance-welded to the tube. | Extremely durable; used in heavy-duty boiler economizers and waste heat recovery. |
| Laser Welded | A high-precision laser welds the fin to the tube. | Minimal heat-affected zone; allows for thinner tube walls and specialized material combinations. |
Materials and Selection
The choice of material depends heavily on the operating environment (temperature, pressure, and corrosive elements).
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Base Tube Materials: Carbon steel, stainless steel, copper, cupro-nickel, and titanium.
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Fin Materials: Aluminum (most common due to high conductivity and low weight), copper, and steel.
Selection Criteria:
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Operating Temperature: L-foot fins are generally limited to 130°C, while G-type can handle up to 400°C.
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Environmental Factors: If the unit is near the coast, Extruded fins are preferred because the aluminum sleeve completely encases the base tube, preventing atmospheric corrosion.
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Mechanical Stress: If the tubes require frequent cleaning (high-pressure water washing), HFW or Extruded fins are robust enough to withstand the impact.
Heat Exchanger Finned Tubes Applications
- HVAC&R: Air coolers, air heaters, fan coil units, cold storage evaporators, and condensers.
- Power Generation: Economizers in boilers, waste heat recovery systems, and cooling systems for gas turbines.
- Petrochemical & Chemical: Air coolers, oil coolers, dryers, and various process heaters and coolers.
- Other Industries: Used in marine applications, absorption chillers, and even in fast breeder nuclear reactors for decay heat removal.
The Datang Advantage: Quality Assurance
Quality is the core of our manufacturing process. Every Datang finned tube undergoes rigorous inspection, including:
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Pull-out force testing to verify fin-to-tube bond integrity.
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Dimensional checks for fin pitch and height accuracy.
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Pressure testing to ensure zero leakage in the base tube.
Contact Datang Today
Looking for a reliable thermal solution? Partner with Datang for high-quality heat exchanger finned tubes tailored to your project.
Heat Exchanger Finned Tubes Classification by Process
The manufacturing method dictates the “Bonding Rate” (thermal contact), which directly impacts the long-term heat transfer efficiency.
A groove is machined into the tube wall, the fin is placed in the groove, and then the metal is rolled back to lock the fin in place.
L-Foot Finned Tubes offer excellent heat transfer and corrosion protection, ideal for cost-effective air-cooled heat exchangers.
LL Type Finned Tubes feature overlapping feet for complete tube coverage, ensuring superior heat transfer and exceptional protection against corrosion.
KLM Finned Tubes feature knurled fins for enhanced bonding and heat transfer, providing durable protection against corrosion.
Uses high-frequency current to heat the contact point between the fin and tube to a plastic state, then applies pressure to fuse them.
High-precision laser technology offers the smallest heat-affected zone and superior bonding strength, ideal for high-end heat exchangers.
Fins are cold-rolled (extruded) directly from the outer wall of a bimetallic tube (usually aluminum over a steel base).
Serrated Finned Tubes feature segmented fins for enhanced turbulence and superior heat transfer, ideal for high-performance industrial boiler applications.
Heat Exchanger Finned Tube By Fin Shape
This category helps engineers select the right tube based on gas flow and fouling (dust) conditions.
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Spiral/Helical Fin Tubes feature a continuous fin wrapped around the base tube, maximizing heat transfer surface in a compact design. Utilizing High-Frequency Welding (HFW) or Extrusion, they ensure superior thermal conductivity and durability for boilers, HVAC, and various industrial heat recovery systems.
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H-Type Finned Tubes feature a unique rectangular geometry that creates straight flow channels, effectively preventing ash accumulation and erosion. Their superior self-cleaning ability and high structural stability make them the ideal choice for waste heat recovery in coal-fired boilers and high-dust industrial environments.
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Serrated Fin Tubes feature segments cut into the fins to create turbulence, significantly enhancing heat transfer efficiency. Ideal for high-performance economizers, they offer a compact design and superior thermal conductivity compared to solid fins, maximizing energy recovery in industrial boiler systems and power generation.
Customizable Heat Exchanger Finned Tube
We can customize the material, specification and length according to your requirements.Solve your problems anytime and anywhere. Customize fin tubes and equipment according to your needs. Provide free technical guidance. Welcome to customize with drawings, so that you can purchase without worries.
Heat Exchanger Fin Tubes Package
Payment Terms:T/T, LC
Delivery: 15-30 days after payment
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Iron frame packing boxes and the desiccants are put into each package for continental transportation as well. or as required
Heat Exchanger Fin Tube Quality Checks
Each of our heat exchanger fin tube is subjected to stringent quality checks.Inspection and Tests Performed:
1.Chemical Composition inspection。
2.Mechanical Properties Test(Tensile Strength, Yield Strength, Elongation, Flaring, Flattening, Hardness, Impact Test).
3.Surface and Dimension Test.
4.No-destructive Test.
5.Hydrostatic Test.
Case Study
Project Title: G-Type Embedded Finned Tubes for Desert Oilfield Cooling | Syria
Project Summary: Datang successfully supplied high-temperature G-Type (Embedded) Finned Tubes for an Air-Cooled Heat Exchanger (ACHE) project in the Syrian desert. Designed to withstand operating temperatures up to 400°C, our solutions ensured reliable crude oil cooling performance under extreme ambient conditions. The project highlights Datang’s expertise in delivering high-thermal-stability components for the demanding Oil & Gas upstream sector.
Project Title: Factory Inspection & Order for Laser Welded Finned Tubes
Project Summary: Datang welcomed a technical team from Brazil for an intensive inspection of our Laser Welded Finned Tube production lines. The focus was on evaluating welding precision and thermal efficiency for high-performance applications. After reviewing our automated laser stations and bond integrity tests, the experts were highly satisfied with the superior quality and placed an immediate order. This project highlights Datang’s ability to meet advanced technical standards in the South American market.
Project Title: Custom Air Cooler Solutions and Strategic Cooperation | Malaysia
Project Summary: Following a comprehensive factory audit and technical evaluation, a leading Malaysian industrial delegation entered into a long-term cooperation agreement with Datang. We provided optimized finned tube bundles tailored for high-humidity tropical environments. The success of this factory inspection and subsequent contract underscores Datang’s commitment to manufacturing transparency and international quality standards.
Project Title: Technical Audit & Supply of HFW Spiral Finned Tubes.
Project Summary: Datang recently hosted a procurement team from Kazakhstan for a technical audit of our High-Frequency Welded (HFW) Spiral Finned Tube production. Following a rigorous two-day inspection of our Yanshan facility and quality protocols, the client was highly impressed by our welding integrity and technical precision. The visit concluded with an on-site order confirmation, solidifying Datang’s reputation as a premier thermal solution partner in the CIS region.
Heat Exchanger Finned Tubes Application
This is the primary application where finned tubes are installed in the convection section of the boiler.
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Feedwater Preheating: Captures heat from exhaust gases to raise the temperature of the water entering the steam drum.
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Fuel Savings: Reducing the stack temperature by 10°C–15°C can increase overall boiler efficiency by approximately 1%, leading to massive long-term fuel cost reductions.
In energy-intensive industries, finned tube economizers turn waste heat into valuable energy assets.
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Steel & Metallurgy: Recovering heat from reheating furnaces and soaking pits.
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Cement & Glass Production: Installed in waste heat boilers at the kiln end to generate auxiliary power or process steam.
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Petrochemicals: Used in the convection zones of process heaters and ethylene cracking furnaces.
Essential for Gas Turbine Combined Cycle (GTCC) power plants.
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Efficient Transfer: Since gas turbine exhaust is relatively clean, Serrated Fin Tubes or Spiral Fin Tubes are densely packed to extract maximum energy within the HRSG unit.
Space is a premium on vessels, making the high surface-to-volume ratio of finned tubes indispensable.
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Compact Energy Recovery: Utilizes the exhaust from the ship’s main engine to produce steam for heating or domestic use on board.
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SCR (Selective Catalytic Reduction): Used to preheat flue gas to the optimal temperature required for catalysts to remove NOx effectively.
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Flue Gas Reheating (GGH): Prevents “white smoke” and acid dew point corrosion in chimneys after wet desulfurization.
Related Product
Heat Exchanger Finned Tube FAQs
A: Datang Steel Pipe has high frequency resistance welding finned tube production line 18, extruded finned tube equipment 30, laser welding finned tube production line 2, wound finned tube(L/LL/KL G Type) production line 12. The annual capacity can reach 100,000 tons, the specification φ 9-273mm finned tube, according to the customer requirements of the standard production, service has exceeded 3000+ enterprises.
A: We can provide fin tube samples for free.
A: After you confirm fin tube sample details, the samples will be ready for delivery in 3-7days,and will be sent to you via express and arrive in 3-5days.
A: Industrial waste heat recovery fin tube can be customized, we can make the new thermoforming or extruding mode based on your drawings and we can sign a confidentiality agreement about your patented product, pls contact us for any further information.
A: Always a pre-production sample,before mass production;always final inspection before shipment.
Inspection & Guarantee Certificate is supplied with shipment, and the Third Party Inspection is available.