CuNi 70/30 Copper Nickel Tee Marine Grade Pipe Fitting ASME B16.5 Class150

CuNi 70/30 Copper Nickel Tee Marine Grade Pipe Fitting ASME B16.5 Class150

1. Product Description

A Copper Nickel Tee is a T-shaped pipe fitting made of copper-nickel alloy, used for flow diversion, combining, or 90° branch connection in piping systems for ships, offshore engineering, offshore platforms, and corrosive media services. By structure, it is classified into equal tee and reducing tee. By manufacturing process, it includes seamless hot-pushed tee, die-forged tee, and welded tee. By end connection, it includes butt weld tee, socket weld tee, and threaded tee.

Typical material grades are C70600 (90/10 CuNi) and C71500 (70/30 CuNi). The 90/10 copper-nickel alloy is copper-based, containing approximately 10% nickel, with small additions of iron and manganese, offering excellent seawater corrosion resistance, anti-biofouling performance, and good overall mechanical properties. The product is usually solution-annealed, pickled, and passivated. Each batch is traceable by heat number and batch number. Material certificates can be supplied to EN 10204 3.1 or 3.2, and classification society certification such as ABS, DNV, CCS, LR, NK, BV, and KR can be applied for.

This technical file is applicable to Copper Nickel Tees manufactured to ASME, ASTM, DIN, EEMUA, MSS, and classification society requirements, for design, procurement, inspection, and certification of ship and offshore piping systems.

2. Applications

Copper Nickel Tees are suitable for the following systems and service conditions:

• Seawater cooling systems, fire main systems, ballast water systems, and bilge drainage systems on ships;

• Seawater transport, cooling, and fire-fighting pipelines on offshore platforms, FPSOs, and offshore drilling units;

• Cooling water systems for desalination plants and coastal power plants;

• Corrosive media transportation pipelines in petrochemical plants;

• Heat exchangers, condensers, coolers, and piping distribution systems;

• Pharmaceutical, food, metallurgical, and other industries requiring high corrosion resistance and cleanliness.

Applicable media include seawater, brine, fresh water, and certain corrosive chemical media.
Applicable environments include high-salinity, humid, flowing seawater, and marine atmospheric conditions.
Typical certification scenarios include classification society product certification, works approval, type approval, and project witnessed testing.

3. Advantages

• Excellent seawater corrosion resistance, especially in flowing seawater environments;

• Strong resistance to pitting, crevice corrosion, and stress corrosion cracking;

• Slow release of copper ions inhibits marine biofouling;

• Good weldability, suitable for TIG, MIG, and arc welding;

• Good balance of strength and toughness, withstanding pressure fluctuations and vibration;

• Non-magnetic, suitable for magnetically sensitive equipment and systems;

• Long service life and low maintenance cost, offering good life-cycle economy;

• Complete material certificates, inspection reports, and classification society documents available;

• Traceability by heat number, batch number, and certificate number, meeting ship and offshore audit requirements;

• Third-party witnessed testing, PMI, NDT, and hydrostatic testing can be arranged as required.

4. Functions

• Divides one fluid flow into two paths, or combines two flows into one in a piping system;

• Provides 90° branch connection and direction change;

• Reducing tee enables pipe diameter transition while dividing or combining flow;

• Acts as a standard pressure-bearing connection component, ensuring connection strength and sealing reliability;

• Suitable for long-term operation under high pressure, high temperature, corrosive media, and marine environments;

• Meets traceability and document completeness requirements for classification society certified projects.

​5.Key Specifications