Copper Nickel Finned Tube | ASTM B111 C70600 Low Fin Tube for Heat Exchangers
Copper Nickel Finned tube
Copper nickel finned tubes manufactured from C70600 (CuNi 90/10) alloy are widely used in heat transfer equipment where high corrosion resistance and efficient thermal performance are required. These tubes are commonly applied in heat exchangers, condensers, evaporators, and marine cooling systems.
C70600 copper nickel low fin tubes provide enhanced heat transfer efficiency by increasing the external surface area of the tube. The fin structure improves heat exchange performance while maintaining the excellent corrosion resistance properties of copper-nickel alloys.
Due to their resistance to seawater corrosion, biofouling and stress corrosion cracking, CuNi 90/10 finned tubes are widely used in offshore engineering, shipbuilding, desalination plants and power generation facilities.
This enhanced surface fin tubes allow our customers to either reduce the size of the heat exchanger or increase its perfornance.
The low finned tubes we manufacture are designed to meet the most efficient and durable thermal performance for the most challenging situations and long lasting service life.
C70600 Copper Nickel Tube Specification
| Item | Specification |
|---|---|
| Material | C70600 Copper Nickel |
| Alloy Type | CuNi 90/10 |
| Product | Low Fin Tube / Finned Tube |
| Standard | ASTM B111 / ASTM B466 |
| Tube Type | Seamless Tube |
| Application | Heat Exchanger / Condenser |
| Fin Type | Low Fin |
C70600 copper nickel tubes contain approximately 90% copper and 10% nickel, with small additions of iron and manganese to improve corrosion resistance in seawater environments.
Chemical Composition of C70600
| Element | % |
|---|---|
| Copper | Balance |
| Nickel | 9 – 11 |
| Iron | 1.0 – 1.8 |
| Manganese | 1.0 max |
- • Outside diameter : 12.7 mm(min) ~ 38.1 mm(max)
- • Pitch : 19 ~ 36 FPI
- • Fin height : 0.7mm ~ 1.588mm
- • Length : 20,000mm(Max.)
- • Product capacity per month : 150,000 meter
- • Dt : Outside diameter of plain end
- • Df : Diameter over fins
- • Dr : Root deameter of finned section
- • Di : Inside diameter of finned section
- • Tw : Wall thickness of plain section
- • Fw : Root wall thickness of finned section
- • PL : Plain end length
- • FL : Finned section length
- • A : Finned section taper length
- • LS : Land section length
- • TL1, TL2 : Length between plain end and land area
- • El : Entire length
Low Fin Tube Design
Low fin tubes are designed with shallow external fins rolled onto the tube surface. This design increases the heat transfer surface area without significantly increasing the tube outer diameter.
Typical advantages include:
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improved heat transfer efficiency
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reduced equipment size
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lower pressure drop compared with high fin tubes
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enhanced thermal performance in condensers and heat exchangers
Manufacturing Process
Copper nickel low fin tubes are produced through precision forming processes including:
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seamless tube production
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cold rolling or finning process
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annealing heat treatment
-
dimensional inspection
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surface cleaning and finishing
The finning process creates uniform fins along the tube surface to maximize heat transfer efficiency.
Typical Applications
C70600 copper nickel finned tubes are commonly used in industrial heat transfer equipment such as:
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power plant condensers
-
marine heat exchangers
-
offshore oil and gas cooling systems
-
desalination plants
-
HVAC heat transfer equipment
These tubes perform well in environments involving seawater, brackish water and high flow velocity cooling systems.
Related Heat Exchanger Tubes
Other heat exchanger tube materials commonly used in similar applications include:
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Stainless Steel Finned Tubes
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Titanium Heat Exchanger Tubes
-
Aluminum Brass Condenser Tubes
