ASTM B111 C70600 Low-Finned Tubes for Seawater Condensers are engineered to improve heat transfer efficiency in shell-and-tube heat exchangers operating with seawater and other chloride-containing cooling media. Manufactured from 90/10 Copper-Nickel (Cu-Ni 90/10) alloy in accordance with ASTM B111, these tubes combine the corrosion resistance of copper-nickel with the enhanced external surface area provided by integral low fins.

The low-fin profile increases the effective heat transfer area without significantly increasing pressure drop, making these tubes an excellent solution for compact condenser and cooler designs. Their outstanding resistance to seawater corrosion, erosion, and marine biofouling ensures reliable long-term performance in demanding offshore, marine, and coastal industrial environments.

Features

Manufactured from ASTM B111 C70600 (90/10 Copper-Nickel)
Excellent resistance to seawater corrosion and chloride attack
Superior erosion-corrosion resistance under high-flow conditions
Enhanced heat transfer through precision integral low fins
Reduced equipment size while maintaining thermal performance
Good resistance to marine biofouling
Excellent formability and weldability
Long service life with low maintenance requirements

Typical Applications

ASTM B111 C70600 low-finned tubes are widely used in heat transfer equipment exposed to seawater or saline cooling media, including:

Seawater condensers
Shell-and-tube heat exchangers
Marine engine cooling systems
Offshore platform cooling equipment
Power plant surface condensers
Desalination plants
LNG terminals
Oil refinery cooling systems
HVAC water-cooled condensers
Central cooling systems for ships

Available Dimensions

Parameter	Range
Base Tube Outside Diameter	12.70–31.75 mm (1/2"–1-1/4")
Tube Wall Thickness	0.70–3.00 mm
Tube Length	Up to 18,000 mm
Fin Outside Diameter	15–38 mm
Fin Height	0.8–2.0 mm
Fin Pitch	8–26 FPI (3.2–1.0 mm pitch)
Heat Transfer Area Increase	Approximately 2–3 times compared with plain tubes

Dimensions can be customized according to project requirements.

Chemical Composition of ASTM B111 C70600

Element	Composition (%)
Copper (Cu)	Balance
Nickel (Ni)	9.0–11.0
Iron (Fe)	1.0–1.8
Manganese (Mn)	1.0 max
Zinc (Zn)	1.0 max
Lead (Pb)	0.05 max
Carbon (C)	0.05 max
Sulfur (S)	0.02 max
Phosphorus (P)	0.02 max

Mechanical Properties

Property	Typical Value
Tensile Strength	≥275 MPa
Yield Strength (0.5% Extension)	≥105 MPa
Elongation	≥30%

Tags:

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

products details

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube