Copper Nickel 70/30 Forged Socket Weld Flange ASME B16.5 Class150 CuNi Alloy

Product Specification

Copper Nickel 70/30 Forged Socket Weld Flange ASME B16.5 Class150 CuNi Alloy SWRF

1.Product Description

Copper Nickel Flange (also known as Cupro Nickel Flange) is a pipe flange connector manufactured primarily from copper (Cu) and nickel (Ni) alloy. Copper and nickel are infinitely soluble in each other, forming a continuous α-phase solid solution that endows the alloy with excellent mechanical properties and corrosion resistance. The product is produced through integral forging, followed by high-temperature forging, solution heat treatment, CNC precision machining, sealing face lapping, and acid pickling/passivation, resulting in a dense structure free from porosity and shrinkage. Primary material grades include Chinese standard BFe10-1-1 (B10, 90/10 copper nickel, equivalent to UNS C70600) and BFe30-1-1 (B30, 70/30 copper nickel, equivalent to UNS C71500). The product complies with ASME B16.5, ASTM B171/B151, GB/T 9119, HG/T20592, DIN, EEMUA 145, and other international and domestic standards.

2.Product Applications

Copper Nickel Flanges are widely used in the following fields:

• Marine and Shipbuilding: Seawater cooling systems, ballast water lines, water supply and drainage systems, engine room circulation piping, and firewater systems on ocean-going vessels.

• Desalination: Seawater intake and brine discharge lines for reverse osmosis/evaporation units.

• Power Plant Cooling Systems: Seawater circulation cooling systems, condenser flanges, and closed cooling water systems at coastal power plants.

• Offshore Oil & Gas Platforms: Seawater transmission pipelines, firefighting systems, and ballast piping.

• Petrochemical Industry: Connection and sealing of pipelines handling corrosive media.

• Other Industries: Construction, pharmaceutical, aviation, aquaculture, metallurgical machinery, etc.

The product is used to connect pipes, pumps, valves, and other equipment, forming a complete piping system.

3 · Product Advantages

1. Superior Seawater Corrosion Resistance: Forms a self‑healing protective oxide film on the surface, with corrosion resistance far superior to 316L stainless steel in seawater, chloride, and salt spray environments. The 90/10 alloy has a corrosion rate of <0.025mm/year, while the 70/30 alloy achieves ≤0.01mm/year.

2. Anti‑Biofouling: Copper ions provide natural antibacterial and antifouling properties, effectively inhibiting the attachment of barnacles, shellfish, algae, and other marine organisms, significantly reducing pipeline maintenance workloads.

3. Excellent Mechanical Properties: High strength, good toughness, and resistance to high‑velocity seawater erosion and cavitation corrosion. The 70/30 alloy has tensile strength ≥490MPa and yield strength ≥180MPa.

4. Good Weldability and Workability: Easy to weld, form, bend, and expand; can be perfectly paired and welded with copper nickel pipes of the same material.

5. Low Magnetic Properties and Long Service Life: Low magnetic characteristics, with a service life up to 3 times that of stainless steel, and a design life of up to 30 years in seawater piping systems.

6. Strong Adaptability: Resistant to high temperatures (≤200°C) and thermal shock, suitable for complex operating conditions with alternating high and low temperatures.

​4.Key Product Specifications

FAQ

1. Are you trading company or manufacturer ? We are manufacturer ,You can see the certification.

2.How long is your delivery time? Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

3. Do you provide samples ? is it free or extra ? Yes, we could offer the sample for free charge but need pay the cost of freight.

4. What is your terms of payment ? Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment.