Copper Nickel Tee | 90/10 70/30 CuNi Marine Pipe Fittings
- Material Grade: C70600, C71500, CuNi10Fe1Mn, CuNi30Mn1Fe
- Alloy Type: 90/10 Copper Nickel, 70/30 Copper Nickel
- Tee Type: Equal Tee, Reducing Tee, Custom Tee
- Connection Type: Butt weld, socket weld, flanged connection or customized
- Standard: ASME B16.9, MSS SP-43, ASTM B366, DIN, EN, EEMUA or customer drawing
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Copper nickel tee is designed for branch connections in copper nickel piping systems. It allows fluid to be divided or combined between the main pipeline and branch pipeline. Due to the excellent seawater corrosion resistance of copper nickel alloys, copper nickel tees are widely used in marine and offshore piping systems where long service life and stable performance are required. It is widely used in shipbuilding, offshore platforms, desalination plants, seawater cooling systems, fire water systems, ballast water systems and heat exchanger pipelines.
Copper nickel alloys can form a protective film in seawater, helping reduce corrosion, erosion corrosion and biofouling. Copper nickel tees also offer good weldability and fabrication performance, making them suitable for shipbuilding installation, offshore modules and prefabricated pipe spool systems. Copper nickel tees can be supplied together with copper nickel pipes, elbows, reducers, flanges, stub ends and other fittings to provide a complete marine copper nickel piping solution.
We supply copper nickel tees in 90/10 copper nickel C70600 / CuNi10Fe1Mn and 70/30 copper nickel C71500 / CuNi30Mn1Fe materials. Available types include copper nickel equal tees, copper nickel reducing tees, butt weld tees and custom fabricated tees according to project drawings.
Available Types of Copper Nickel Tee
| Type | Description |
|---|---|
| Copper Nickel Equal Tee | All three ends have the same size; used for equal branch connection |
| Copper Nickel Reducing Tee | Branch size is smaller than the main pipe size; used for reducing branch connection |
| Butt Weld Copper Nickel Tee | Suitable for welded copper nickel piping systems |
| Fabricated Copper Nickel Tee | Manufactured by welding or fabrication according to project requirement |
| Custom Copper Nickel Tee | Produced according to customer drawings, samples or technical specifications |

Copper Nickel Tee Material Grades
| Material | UNS Grade | Common Name | Typical Application |
|---|---|---|---|
| 90/10 Copper Nickel | C70600 | CuNi10Fe1Mn | General marine seawater piping systems |
| 70/30 Copper Nickel | C71500 | CuNi30Mn1Fe | Offshore, high-strength and severe seawater service |
Standards for Copper Nickel Tee
Copper nickel tees can be supplied according to international standards, marine standards or customer project specifications.
Common standards include:
ASME B16.9
MSS SP-43
ASTM B366
DIN marine piping standards
EN copper alloy piping standards
EEMUA standards for copper nickel piping systems
Customer drawings and project specifications
Copper Nickel Tee Specification
| Item | Specification |
|---|---|
| Product | Copper Nickel Tee |
| Material | C70600, C71500, CuNi10Fe1Mn, CuNi30Mn1Fe |
| Alloy | 90/10 CuNi, 70/30 CuNi |
| Tee Type | Equal Tee, Reducing Tee, Custom Tee |
| Connection | Butt weld, socket weld, flanged or customized |
| Size | Standard size or customized |
| Wall Thickness | According to pipe size, schedule or project requirement |
| Manufacturing Method | Formed, welded, fabricated or machined |
| Surface Finish | Cleaned, pickled, polished or as required |
| Certificate | Material test certificate available upon request |
| Inspection | Visual inspection, dimensional inspection, PMI, NDT if required |
| Packing | Wooden cases, pallets or seaworthy export packing |
Copper Nickel Equal Tee VS Reducing Tee
Copper Nickel Equal Tee
Copper nickel equal tee has the same diameter at all three ends. It is used when the branch pipeline has the same size as the main pipeline. Equal tees are commonly used in marine seawater cooling, fire water and ballast water piping systems.


Copper Nickel Reducing Tee
Copper nickel reducing tee has a smaller branch size compared with the main pipeline. It is used when the pipe system requires a branch connection with reduced flow capacity or smaller pipeline size. Reducing tees are commonly used in shipbuilding and offshore piping arrangements where different pipe sizes are connected.


90/10 VS 70/30 Copper Nickel Tee
| Item | 90/10 Copper Nickel Tee | 70/30 Copper Nickel Tee |
|---|---|---|
| UNS Grade | C70600 | C71500 |
| Common Grade | CuNi10Fe1Mn | CuNi30Mn1Fe |
| Copper / Nickel Ratio | Approx. 90% Cu / 10% Ni | Approx. 70% Cu / 30% Ni |
| Corrosion Resistance | Excellent | Excellent |
| Strength | Good | Higher |
| Erosion Resistance | Good | Better in severe conditions |
| Typical Use | General marine seawater systems | Offshore and high-velocity seawater service |
| Cost | More economical | Higher |
90/10 copper nickel tees are commonly selected for general marine seawater piping systems. 70/30 copper nickel tees are recommended for offshore, high-strength, higher pressure or more severe seawater service conditions.
Matching Copper Nickel Pipe Fittings
We can supply complete copper nickel piping products together with copper nickel tees, including:
Copper nickel pipe
Copper nickel elbow
Copper nickel reducer
Copper nickel flange
Copper nickel cap
Copper nickel stub end
Copper nickel coupling
Copper nickel union
Copper nickel pipe spool
Custom copper nickel fittings
Quality Control and Inspection
To ensure reliable performance in marine and seawater environments, copper nickel tees can be inspected according to project specifications and applicable standards.
Available inspection items include:
Chemical composition analysis
Mechanical property test if required
Visual inspection
Dimensional inspection
Wall thickness inspection
Branch size inspection
Surface quality inspection
PMI material verification
Dye penetrant test if required
Ultrasonic test if required
Hydrostatic test if applicable
Weld inspection if applicable
Third-party inspection
Classification society inspection upon request
Material test certificate
Packaging of Copper Nickel Tee
Copper nickel tees are packed carefully to avoid collision, deformation, scratching and contamination during transportation. Standard export packing includes plastic wrapping, carton boxes, wooden cases, wooden pallets and seaworthy packing.
For project orders, each package can be marked according to size, material grade, heat number, quantity and customer requirements.
Why Choose Us for Copper Nickel Tee?
Supply 90/10 and 70/30 copper nickel tees
Available materials: C70600, C71500, CuNi10Fe1Mn, CuNi30Mn1Fe
Equal tee, reducing tee and custom tee available
Standard sizes and custom drawings are supported
Matching copper nickel pipes, elbows, reducers, flanges and stub ends can be supplied
Suitable for marine, offshore, desalination and seawater systems
Strict dimensional inspection and material control
Third-party inspection can be arranged upon request
Export seaworthy packing for safe delivery
Technical support for copper nickel piping projects

Features of Copper Nickel Tee
Excellent resistance to seawater corrosion
Good resistance to erosion corrosion in flowing seawater
Suitable for marine, offshore and desalination applications
Good weldability and fabrication performance
Available in 90/10 and 70/30 copper nickel alloys
Equal tee and reducing tee available
Can be supplied according to standard dimensions or customer drawings
Compatible with copper nickel pipes, elbows, reducers, flanges and stub ends
Suitable for prefabricated copper nickel pipe spool systems
Long service life and low maintenance cost in marine environments

Applications of Copper Nickel Tee
Copper nickel tees are widely used for branch connections in marine and seawater piping systems, including:
Marine seawater cooling systems
Shipbuilding piping systems
Offshore platform piping
Fire water systems
Ballast water systems
Bilge water systems
Deck wash systems
Desalination plants
Heat exchanger and condenser pipelines
Seawater intake and discharge lines
Coastal power plants
Marine oil and gas piping systems
Naval vessels, tankers, LNG carriers, FPSO units and offshore support vessels
















