Low Fin Tube ASTM B111 C71500 Copper Nickel Alloy Base Tube

Low fin tubes fabricated from ASTM B111 C71500 (Copper Nickel Alloy 70/30) are exceptionally well-suited for high-performance heat exchangers, particularly in marine, desalination, and power plant applications. The combination of enhanced heat transfer efficiency and remarkable resistance to corrosion makes these tubes a preferred choice in demanding environments.

Material Characteristics of ASTM B111 C71500: This specification covers seamless copper-nickel alloy tubes. The C71500 alloy, also known as Copper Nickel 70/30, comprises 70% copper and 30% nickel, providing excellent resistance to seawater corrosion, biofouling, and erosion. The alloy also contains small amounts of iron and manganese to enhance overall strength and corrosion resistance.

Low Fins: The fins are integrally formed from the base tube material through a precise rolling or extrusion process, increasing the external surface area for better heat transfer. These integral fins ensure a strong bond with no risk of detachment.

Features:

1. Enhanced Heat Transfer:

• Increased Surface Area: The low fins significantly increase the external surface area, facilitating efficient heat transfer between the fluid inside the tube and the external environment.
• Improved Thermal Performance: The fins disrupt the fluid boundary layer, promoting turbulence and enhancing the convective heat transfer coefficient.

2. Corrosion Resistance:

• Superior Seawater Resistance: C71500 Copper Nickel offers excellent resistance to seawater corrosion, making these tubes ideal for marine applications.
• Biofouling Resistance: The alloy resists biofouling, reducing maintenance and ensuring long-term performance in seawater environments.
• Erosion Resistance: The addition of iron and manganese improves resistance to erosion, particularly in high-velocity water and turbulent flow conditions.

3. Mechanical Robustness:

• High Strength: The copper-nickel alloy provides good mechanical properties, including tensile and yield strength, ensuring durability and reliability under pressure and thermal cycling.
• Durability: The robust construction and inherent corrosion resistance of the alloy ensure a long service life, even in harsh operating conditions.

4. Versatility in Applications:

• Heat Exchangers: Ideal for shell and tube heat exchangers, air-cooled heat exchangers, and plate heat exchangers, especially in marine and coastal environments.
• Desalination Plants: Used in desalination plants to efficiently transfer heat in the process of converting seawater to freshwater.
• Power Plants: Suitable for heat exchangers in power plants, where resistance to corrosion and biofouling is critical for long-term operation.

5. Compact Design:

• Space-Saving: The low fin design allows for a more compact heat exchanger configuration, reducing overall size and weight while maintaining high thermal efficiency.
• Cost-Effective: The compact design leads to material and installation cost savings, making these tubes an economical choice for large-scale applications.

Applications:

• Marine Industry:Shipboard Heat Exchangers, Offshore Platforms
• Desalination Plants:Evaporators and Condensers
• Power Generation: Condenser Tubes, Feedwater Heaters
• Chemical Processing: Corrosive Media Heat Exchangers.
• HVAC and Refrigeration: Cooling Coils.