CuNi 70/30 Copper Nickel Socket Welding Flange 150# Forged Marine

CuNi 70/30 Copper Nickel Socket Welding Flange 150# Forged Marine

1. Product Description

Copper Nickel Blind Flange is a solid copper-nickel alloy flange with no center bore, used to close pipe ends, valve interfaces, or equipment openings. Its external shape is the same as a standard flange, but it has no inner bore. It is connected to a mating flange with bolts and a gasket to achieve complete sealing, thereby isolating the media flow in the pipeline. Common materials are B10 (90/10 CuNi, UNS C70600) and B30 (70/30 CuNi, UNS C71500). The blind flange has a simple structure and reliable sealing, suitable for temporary or permanent closure of pipelines. It can be manufactured according to ASME, DIN, EN, BS, EEMUA, and other standards. Face finishes include Raised Face, Flat Face, and Ring Joint.

2. Product Applications

Copper Nickel Blind Flanges are mainly used in the following fields:

• Shipbuilding and Offshore Engineering: Seawater pipeline end closure, ballast water system isolation, fire water system pressure test blind, bilge water system maintenance isolation;

• Power and Energy: Cooling water systems, condenser piping pressure testing and isolation in coastal power plants;

• Seawater Desalination: Pipeline end closure and system sectional isolation in desalination plants;

• Petrochemical: Closure and isolation of chemical plant equipment, heat exchangers, condensers, and corrosive media pipelines;

• Other Industries: Pressure testing, maintenance, and permanent closure of piping systems requiring seawater corrosion resistance and anti-biofouling performance.

3. Product Advantages

1. Reliable Sealing: The solid structure combined with gaskets and bolts achieves complete sealing and effectively isolates media.

2. Excellent Corrosion Resistance: Outstanding corrosion resistance in seawater, brackish water, and chloride media.

3. Anti-Biofouling: Copper ions inhibit marine organism adhesion, reducing maintenance costs.

4. High Strength: Integrally forged with strong pressure containment capability, suitable for medium and high pressure conditions.

5. Easy Installation: Used with standard flanges, bolted connection, easy to assemble and disassemble.

6. Good Material Compatibility: Avoids galvanic corrosion when connected to copper-nickel pipes and copper alloy equipment.

7. Long Service Life: Service life in seawater environments can reach decades, with significant economic benefits.

4. Product Functions

1. Closure: Closes pipe ends, valve interfaces, or equipment openings to prevent media leakage.

2. Isolation: Achieves sectional isolation in piping systems, facilitating maintenance and inspection.

3. Pressure Testing: Used for temporary closure of pipe openings during hydrostatic testing of piping systems.

4. Sealing: Works with gaskets and bolts to achieve long-term reliable sealing.

5. Pressure Containment: Withstands internal pressure and temperature fluctuations of the piping system.

6. Corrosion Prevention: Matches copper-nickel pipes to avoid dissimilar metal contact corrosion.

5. Key Technical Parameters​

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.