Seawater Corrosion Resistant Copper Nickel Equal Tee with Butt Weld Connection ASME B16.9 Compliant

Cupro Nickel 70/30 Equal Tee UNS C71500 ASME B16.9 Seawater Pipe Fitting Butt Weld

1. Product Description

Copper Nickel Equal Tee is a three-port T-shaped pipe fitting with equal nominal diameters. It is made of copper-nickel alloy, typically UNS C70600 (90/10 Cu-Ni) and UNS C71500 (70/30 Cu-Ni). The fitting is manufactured by seamless or forging process and is designed for 90° branch connections in piping systems. It complies with ASME B16.9, ASTM B466/B467, MSS SP-43 and DIN 86086. The surface is usually pickled and passivated. The material combines good mechanical strength with excellent resistance to seawater and chloride-containing media.

2. Product Applications

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

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

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

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

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

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

3. Product Advantages

1. Strong seawater corrosion resistance: forms a stable protective film in static and flowing seawater; corrosion rate is less than 0.025 mm/year in marine environments.

2. Natural anti-biofouling: releases trace copper ions continuously, helping prevent marine organism adhesion and growth without external coatings or electrolytic systems.

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

4. High flow velocity resistance: can operate safely at seawater velocities up to 3.5 m/s.

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

6. Cost-effective over life cycle: higher initial cost than carbon steel, but lower maintenance and longer service life reduce overall cost.

4. Product Functions

1. Split or combine flow: three equal openings allow one fluid stream to be divided into two or two streams to be merged into one.

2. Provide 90° branch connection: creates a perpendicular branch in pipeline systems.

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

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

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

5. Key Technical Parameters​

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