CuNi 70/30 Copper Nickel Equal Tee Butt Weld Fitting ASME B16.9 with Anti-Biofouling and High Seawater Corrosion Resistance

CuNi 70/30 Copper Nickel Equal Tee Butt Weld Fitting ASME B16.9 Anti-Biofouling

1. Product Description

Copper Nickel Equal Tee is a T-shaped pipe fitting with three equal-diameter ports. It is made from copper-nickel alloy, mainly UNS C70600 (90/10 Cu-Ni) and UNS C71500 (70/30 Cu-Ni). The fitting is produced by seamless or forging processes and is used for 90-degree branch connections in piping systems. It is manufactured according to ASME B16.9, ASTM B466/B467, MSS SP-43, and DIN 86086. The material offers high strength, excellent seawater corrosion resistance, and good welding performance. The surface is normally pickled and passivated.

2. Product Applications

1. Shipbuilding and marine engineering: seawater cooling systems, ballast water systems, fire fighting pipelines, bilge and sewage discharge systems.

2. Offshore oil and gas platforms: seawater lift pipes, equipment cooling lines, firewater ring mains, seawater injection systems.

3. Desalination plants: intake pipelines, brine circulation, reverse osmosis feed distribution, concentrate discharge.

4. Power generation: condenser cooling water systems, essential service water, circulating cooling water.

5. Petrochemical industry: transport of chloride-containing, saline, and weakly acidic media.

6. Coastal facilities: coastal fire protection, large HVAC systems, marine seawater retrofit projects.

3. Product Advantages

1. Excellent seawater corrosion resistance: stable protective film in static and flowing seawater; corrosion rate below 0.025 mm/year in marine environments.

2. Natural anti-biofouling: continuous release of trace copper ions helps prevent marine organism attachment and growth.

3. Good weldability: suitable for cold bending and flaring; generally no preheating or post-weld heat treatment required.

4. High flow velocity resistance: safe operation at seawater velocities up to 3.5 m/s.

5. Low maintenance and long service life: marine service life can reach 25 years or more.

6. Good life-cycle economy: higher initial cost than carbon steel, but lower maintenance and longer service life reduce total cost.

4. Product Functions

1. Flow splitting and combining: three equal openings allow one stream to be divided into two or two streams to be merged into one.

2. 90-degree branch connection: provides a perpendicular branch in pipeline systems.

3. Balanced flow distribution: ensures stable flow among the three ports with low pressure loss.

4. Corrosive media conveyance: suitable for long-term transportation of seawater and other corrosive fluids.

5. System integrity: maintains structural strength and sealing performance under high-temperature and high-pressure conditions.

5. Key Technical Parameters​

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