Copper Nickel Flanges | Cu Ni Flanges

Q: Q1: You mention Cu Ni 90/10 and 70/30. What's the main difference for flanges?

A: Great question! Both are awesome for seawater. Cu Ni 90/10 is very popular, easy to fabricate, and offers excellent general corrosion resistance. Cu Ni 70/30 has more nickel, giving it a bit more strength and even better resistance to erosion from fast-flowing water, making it ideal for more demanding or higher-velocity applications.

Q: Q2: Are these Copper Nickel flanges really good for salty, marine environments?

A: Absolutely, that's their superpower! Their resistance to seawater corrosion and biofouling (where marine life tries to make a home on your pipes) is exceptional. They're practically born for the ocean.

Q: Q3: I need a specific flange size or face type that's not standard. Can you help?

A: You bet! We love custom challenges. We can machine flanges to your exact specifications, whether it's a unique size, a special face type (like Raised Face, Ring Type Joint, or Flat Face), or other custom requirements. Just let us know what you need!

Q: Q4: Do your flanges meet those big international standards like ASME and DIN?

A: Yes, they do! Our Cupro Nickel Flanges are manufactured to comply with major global standards including ASME B16.5 (for pipe flanges), DIN, EN, and others. We provide all the necessary certifications so you can be confident in their quality.

Q: Q5: I need these flanges pretty quickly. What are your typical delivery times?

A: We know deadlines are important! For most standard sizes of Copper Nickel Flanges, we keep them in stock and can often ship them out very quickly. For custom orders or very large quantities, delivery usually ranges from 2 to 4 weeks, depending on the specifics. The best bet is to give us a call or email, and we'll give you a precise timeline for your order.

If your project involves battling tough marine environments or handling corrosive fluids, you know that choosing the right connections is absolutely critical. That’s where our top-of-the-line Copper Nickel Flanges, also known as Cu Ni Flanges or Cupro Nickel Flanges, step in to save the day! Here at Solitaire Overseas, we're leading manufacturers and suppliers of these amazing flanges in both popular grades: the reliable CuNi 90/10 (C70600) and the extra-tough CuNi 70/30 (C71500).

Why are they so special? Think incredible corrosion resistance (especially against salty seawater!), great thermal stability, and a lifespan that just keeps on going. This makes our Copper Nickel Flanges the heroes for marine applications, power generation, chemical plants, and demanding offshore platforms. We make sure they’re engineered to meet all the important international standards, weld like a dream, naturally fight off pesky biofouling (goodbye, barnacles!), and offer solid mechanical strength. With a huge stock of all types – Slip On, Weld Neck, Blind, Threaded, you name it – all pressure-rated and ready to ship globally, we’re here to make your tough jobs a whole lot easier.

What Exactly Are Copper Nickel Flanges

Alright, let's break it down. Copper Nickel Flanges are specialized pipe connectors made from an awesome alloy of copper, nickel, and a few other strengthening buddies like iron. These aren't just any flanges; they're manufactured to tough standards like ASTM B151, B122, and B466.

The real magic of these Cupro Nickel Flanges is their almost legendary resistance to seawater corrosion, stress cracking, and erosion. This makes them an absolute must-have for saltwater piping systems, condenser units, and heat exchangers. You've got two main players:

Cu Ni 90/10 (90% Copper, 10% Nickel): A fantastic all-rounder, offering great corrosion resistance and ease of fabrication.
Cu Ni 70/30 (70% Copper, 30% Nickel): Steps it up a notch with even better strength and flow velocity resistance, perfect for more demanding conditions.

Both types boast high tensile strength, conduct heat beautifully, and naturally resist biofouling (marine growth just doesn't like to stick to them!). That’s why you’ll see them hard at work in oil & gas, desalination plants, shipbuilding (especially naval vessels!), and those rugged offshore drilling platforms.

Key Specifications Of Copper Nickel Flanges

Here is what you need to know about our top-quality Cu Ni Flanges:

Specification	What This Means For Your Project
Standard	ASTM B151 / ASME SB151, B122, B466 – Built to proven standards
Grades	Cu Ni 90/10 (UNS C70600), Cu Ni 70/30 (UNS C71500) – Choose your champion!
Product Type	Forged Pipe Flanges – Strong and reliable
Flange Types	Slip On, Weld Neck, Socket Weld, Lap Joint, Blind, Threaded – All the connections you need
Pressure Ratings	Class 150, 300, 600, 900, 1500 – Ready for the pressure
Sizes	½” NB to 24” NB (Got something bigger? Just ask!)
Face Types	Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) – The perfect seal
Manufacturing Process	Forged, Heat Treated, Precision Machined
Testing	PMI, Hydrostatic, UT, NDT, Radiography – Quality, verified
Standards Compliance	ANSI B16.5, ASME B16.47, DIN, EN, JIS, BS – Globally accepted
Applications	Seawater Systems, Heat Exchangers, Naval Gear, Chemical Plants

Cu Ni Flanges Industry Standards & Certifications

We take quality seriously, so our Copper Nickel Flanges are made to meet (and often beat!) these important global standards:

Standard/Certification	Why It's Good News For You
ASTM B151 / B466	Guarantees the right material and manufacturing.
ASME B16.5 / B16.47	Ensures perfect dimensions and pressure ratings.
ANSI / DIN / BS / EN	Compliance with major international flange standards.
NACE MR0175	Ready for sour service environments (when specified).
ISO 9001 (QMS)	Our quality management system is top-notch.
ISO 14001 (EMS)	We care about responsible manufacturing.
PED 2014/68/EU	Certified safe for pressure equipment in Europe.

Copper Nickel Flanges Chemical Composition

The unique blend of elements is what gives these flanges their superpowers:

Element	Cu Ni 90/10 (C70600) (%)	Cu Ni 70/30 (C71500) (%)	Why It Matters
Copper (Cu)	88.6 – 90.0	68.5 – 71.5	The corrosion-resistant base.
Nickel (Ni)	9.0 – 11.0	28.4 – 31.5	Boosts strength & corrosion resistance, esp. in 70/30.
Iron (Fe)	1.0 – 1.8	0.4 – 1.0	Enhances strength and erosion resistance.
Manganese (Mn)	1.0 max	1.0 max	Improves strength and deoxidizes.
Lead (Pb)	0.05 max	0.05 max	Kept very low.
Zinc (Zn)	1.0 max	1.0 max	Kept low to prevent dezincification.

Cupro Nickel Flanges Mechanical Properties

Property	Cu Ni 90/10	Cu Ni 70/30	What This Means For You
Tensile Strength	≥ 275 MPa (40 ksi)	≥ 310 MPa (45 ksi)	How much pull it can take before breaking.
Yield Strength	≥ 105 MPa (15 ksi)	≥ 125 MPa (18 ksi)	Resists permanent bending under stress.
Elongation (% in 50mm)	≥ 30%	≥ 30%	Shows good ductility – it can stretch!
Hardness (HRB)	≤ 80	≤ 80	Tough but not overly brittle.
Impact Strength	High (Great even in the cold!)	High (Great even in the cold!)	Resists sudden shocks and impacts.

Advantages of Choosing Our Copper Nickel Flanges

Wondering why Copper Nickel (Cu-Ni) Flanges are a smart investment? Here is what makes them stand out:

Exceptional Corrosion Resistance: Especially effective in seawater and chemical environments—no more rust-related issues.
Naturally Anti-Fouling: Marine organisms struggle to attach, ensuring cleaner pipelines and better flow efficiency.
High Thermal Conductivity: Ideal for use in heat exchangers and condensers due to excellent heat transfer capabilities.
Superior Weldability: Easy to fabricate and install, making your project run smoother from start to finish.
Long-Term Durability: Designed for extended service life with minimal maintenance—saving you both time and money.
High Strength Under Pressure: Engineered to perform reliably under demanding conditions.

Copper Nickel flanges aren’t just components—they’re high-performance solutions built for harsh environments.

Where Do These Wonder Flanges Work Best? Common Applications

You'll find our Copper Nickel Flanges hard at work in some of the most challenging spots:

Marine Seawater Piping Systems: The #1 champion here!
Offshore Oil & Gas Platforms: Battling the harsh ocean environment.
Desalination Plants: Turning saltwater into fresh water.
Shipbuilding & Naval Vessels: For critical onboard systems.
Power Plants & Condensers: Efficiently handling cooling water.
Firefighting & Ballast Systems: Reliable performance when it matters most.
Heat Exchangers & Cooling Systems: For optimal thermal transfer.
Chemical Processing: Where specific corrosion resistance is needed.

Why Choose Solitaire Overseas for Cupro Nickel Flanges?

Selecting the right supplier is more than just a transaction—it’s about choosing a trusted partner. At Solitaire Overseas, we take pride in being a reliable global source for high-quality Cupro Nickel Flanges. Our products not only meet but exceed expectations with superior build and consistent performance. Backed by years of industry expertise, our team ensures you get the right fit for your application. We maintain a vast inventory and offer quick turnaround times, even on custom orders tailored to your specifications. Our flanges are competitively priced without compromising on quality and are thoroughly tested to comply with ASTM, ASME, and EN standards. From standard Cu-Ni 90/10 Slip-On Flanges to custom 70/30 Blind Flanges for critical offshore use, Solitaire Overseas delivers dependable, precision-engineered solutions—every time.

FAQ

You mention Cu Ni 90/10 and 70/30. What's the main difference for flanges?

Great question! Both are awesome for seawater. Cu Ni 90/10 is very popular, easy to fabricate, and offers excellent general corrosion resistance. Cu Ni 70/30 has more nickel, giving it a bit more strength and even better resistance to erosion from fast-flowing water, making it ideal for more demanding or higher-velocity applications.

Are these Copper Nickel flanges really good for salty, marine environments?

Absolutely, that's their superpower! Their resistance to seawater corrosion and biofouling (where marine life tries to make a home on your pipes) is exceptional. They're practically born for the ocean.

I need a specific flange size or face type that's not standard. Can you help?

You bet! We love custom challenges. We can machine flanges to your exact specifications, whether it's a unique size, a special face type (like Raised Face, Ring Type Joint, or Flat Face), or other custom requirements. Just let us know what you need!

Do your flanges meet those big international standards like ASME and DIN?

Yes, they do! Our Cupro Nickel Flanges are manufactured to comply with major global standards including ASME B16.5 (for pipe flanges), DIN, EN, and others. We provide all the necessary certifications so you can be confident in their quality.

I need these flanges pretty quickly. What are your typical delivery times?

We know deadlines are important! For most standard sizes of Copper Nickel Flanges, we keep them in stock and can often ship them out very quickly. For custom orders or very large quantities, delivery usually ranges from 2 to 4 weeks, depending on the specifics. The best bet is to give us a call or email, and we'll give you a precise timeline for your order.