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Everything You Need to Know About Copper Nickel 70/30 Flanges – Types, Uses & Benefits

When it comes to marine engineering, desalination plants, and high-pressure piping systems, Copper Nickel 70/30 Flanges Manufacturers play a vital role in supplying components that can endure extreme environments. At Sandvik, we specialize in producing top-grade Copper Nickel 70/30 Flanges that offer long-lasting performance, exceptional corrosion resistance, and structural strength. This alloy, consisting of 70% copper and 30% nickel, is recognized for its durability in harsh and corrosive environments, particularly seawater applications.

What is Copper Nickel 70/30 Flanges? These flanges are pipe connectors made from a copper-nickel alloy with a 70/30 composition. Known for superior resistance to biofouling and stress corrosion cracking, these flanges are widely used in saltwater systems, offshore platforms, and chemical processing units. The alloy also contains small amounts of iron and manganese, which further enhance its strength and corrosion resistance, making it perfect for demanding industrial use.

One major advantage of working with Copper Nickel 70/30 Flanges Suppliers like Sandvik is the assurance of high-performance flanges that meet global quality standards. These flanges are highly resistant to pitting, erosion, and stress-corrosion cracking. They maintain their mechanical integrity under high temperatures and pressures. Their excellent weldability and formability also make them a preferred choice for fabricators across various sectors.

Copper Nickel 70/30 Flanges are used across industries where high resistance to seawater and acidic environments is critical. In the marine sector, they’re used for shipbuilding, including seawater cooling, bilge, ballast, and firefighting systems. The power generation industry utilizes these flanges for condenser tubes and heat exchangers. Oil and gas companies use them for offshore and submarine pipeline connections. Partnering with Copper Nickel 70/30 Flanges Stockists ensures you get a consistent supply of products tailored to your industry needs.

Sandvik offers a wide range of Copper Nickel 70/30 Flanges to meet diverse application requirements:

Slip-On Flanges: These are ideal for low-pressure applications. They’re easy to install and weld onto the pipe, making them a cost-effective solution.

Weld Neck Flanges: Designed for high-pressure and high-temperature conditions, these flanges are butt-welded to the pipe, ensuring excellent strength and leakage resistance.

Blind Flanges: Used to close off piping systems or valves, these flanges allow for future expansion or maintenance while preventing fluid flow.

Socket Weld Flanges: Perfect for small-diameter, high-pressure pipelines. They ensure a smooth bore and better fluid flow characteristics.

Threaded Flanges: Suitable for systems where welding isn’t feasible. These are ideal for low-pressure applications in hazardous zones.

By working with reliable Copper Nickel 70/30 Flanges Exporters like Sandvik, you gain access to certified products with full traceability, consistent mechanical properties, and tailored machining based on project requirements. We ensure quality at every step—from sourcing raw materials to final inspection—to meet international specifications like ASTM B151 and ASME B16.5.

In conclusion, Copper Nickel 70/30 Flanges are the go-to choice for critical infrastructure that demands corrosion resistance, longevity, and structural reliability. Sandvik is proud to be a trusted partner in delivering superior-quality flanges globally, supporting industries from shipbuilding to power generation with top-tier components that last.

Specification of Copper Nickel 70/30 Flanges

Cupro Nickel Flanges Specification : ASTM B151 / ASME SB151
Dimension Standard : ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Standard : ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Size : 1/2" (15 NB) to 48" (1200NB)
Class / Pressure : 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
DIN Flanges : DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673.
JIS Flanges : JIS B2220 5K, JIS B2220 10K, JIS B2220 16K, JIS B2220 20K
BS Flanges : BS4504 PN 6, BS 4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS 4504 PN 64, BS 4504 PN 100, BS 4504 PN 160, BS 4504 PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H.

Equivalent Grades of Copper Nickel 70/30 Flanges

STANDARD UNS WNR. EN AFNOR
Cupro Nickel 70/30 C71500 2.0882 NiCr20CuMo Z2NCUD31-20AZ

Chemical Composition of Copper Nickel 70/30 Flanges

Grade Cu Mn Pb Ni Fe Zn
Cupro Nickel 70/30 65 min 1.0 max 0.05 max 29-33 max 0.4-1.0 max 1 max

Mechanical Properties of Copper Nickel 70/30 Flanges

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
0.323 lb/in3 at 68 F 2260 F 50000 psi 20000 psi 30 %