Finned Tubes - Dolphin Heat Transfer

Enhanced Thermal Exchange Solutions

At Dolphin Heat Transfer, we are committed to delivering advanced thermal solutions through our high-performance finned tubes, meticulously designed to maximize heat transfer efficiency across a broad spectrum of industrial applications. Whether used in heat exchangers, boilers, air coolers, or other thermal systems, our finned tubes are crafted with a focus on precision engineering and long-term reliability. Manufactured to withstand high mechanical stress and harsh operating environments, these tubes significantly enhance the surface area for heat exchange, leading to improved energy efficiency and reduced operational costs. Our production capabilities include the use of advanced fabrication techniques that ensure consistent quality and tight dimensional tolerances, critical for demanding industries such as oil and gas, power generation, petrochemical, and HVAC.

We offer a versatile range of G-Fin and L-Fin tube configurations to meet varying operational requirements. G-Fin tubes are specifically engineered for high-temperature applications, providing a strong mechanical bond through a helical groove and peening process, ensuring exceptional thermal performance and durability. L-Fin tubes, on the other hand, are optimized for moderate temperature services and feature an ‘L’-shaped tension-wound fin that offers enhanced protection against corrosion while maintaining excellent heat transfer efficiency. Both types are available in multiple material options, fin densities, and dimensions, allowing us to customize solutions based on your specific thermal management needs. With our commitment to quality, innovation, and customer satisfaction, Dolphin Heat Transfer stands as a trusted partner in industrial heat transfer excellence.

Beyond pressure vessels, our manufacturing portfolio extends to a wide range of industrial equipment, including:

G-Fin Tubes

Designed for high-temperature applications, G-Fin Tubes offer superior thermal performance and mechanical strength. A helical groove is carefully machined into the tube surface, into which the fin is mechanically bonded through a peening process. This ensures robust fin adherence and maximum heat transfer efficiency.

Maximum Design Temperature: Up to 450°C
Fin Bonding Method: Helical groove with mechanical peening
Fin Density: 157 to 512 fins per meter (4 to 13 fins per inch)
Fin Height: 6.35 mm to 20.5 mm (0.25 inch to 0.807 inch)
Tube Length: Up to 12.2 meters
Tube Diameter: 14.29 mm OD to 50.8 mm OD
Material Compatibility: Any metal tube available

L-Fin Tubes

Optimized for moderate temperature conditions, L-Fin Tubes are crafted by shaping the fin strip into an “L” profile, then tension-wound onto the base tube. The fin’s foot fully covers the surface between adjacent fins, providing excellent base tube protection from corrosion and external wear.

Maximum Design Temperature: Up to 150°C
Fin Bonding Method: Tension-wound “L” shaped fins
Corrosion Resistance: Enhanced surface protection between fins
Design Specs: Shares same density, height, and length specs as G-Fin
Cost Advantage: More economical for high-cost materials due to thinner tube gauge requirements compared to G-Fin

KL-Fin Tubes

KL-Fin Tubes combine the advantages of L-type fins with enhanced mechanical bonding. A knurling process is applied to the tube surface before the fin is wrapped and embedded into the knurled pattern, significantly improving fin-to-tube contact and resistance to vibration or thermal stress. This type is ideal for applications requiring stronger fin attachment and improved heat transfer performance over standard L-Fins.

Maximum Design Temperature: Up to 250°C
Fin Bonding Method: Embedded into knurled tube surface
Fin Density: 157 to 472 fins per meter (4 to 12 fins per inch)
Fin Height: 6.35 mm to 19 mm (0.25 inch to 0.75 inch)
Tube Length: Up to 12.2 meters
Tube Diameter: 14.29 mm OD to 50.8 mm OD
Material Compatibility: Any metal tube available

Extruded-Fin Tubes

Extruded Fin Tubes are engineered for high-corrosion and high-temperature environments. A thick aluminum sleeve is mechanically extruded over the base tube, forming integral fins with excellent bond strength and full protection of the base metal. This design delivers superior durability and thermal performance, making it ideal for harsh conditions such as offshore, petrochemical, or corrosive gas applications.

Maximum Design Temperature: Up to 300°C
Fin Bonding Method: Aluminum sleeve extrusion over base tube
Fin Density: 236 to 709 fins per meter (6 to 18 fins per inch)
Fin Height: 8 mm to 16 mm (0.315 inch to 0.63 inch)
Tube Length: Up to 12.2 meters
Tube Diameter: 19.05 mm OD to 50.8 mm OD
Material Compatibility: Carbon steel, stainless steel, copper, and other alloys with aluminum fins

Reach to Us for Any Customized Requirements

Discover high-performance products crafted to your exact needs. Whether you’re placing bulk orders, looking for custom-built solutions, or need expert advice, our team is ready to help. Request a competitive quote today and experience the trusted quality of Dolphin.