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CuNi 90 10 Pipe Flange Supplier

We export high-quality Copper-Nickel Flanges as per ASTM B151 standard. CuNi Flanges manufactured by us are of ASME B16.5, ANSI B16.5, ASME B16.47 dimension standards. Contact for best price.
Other Names: ASTM B151 UNS C70600, ASME B151 UNS C70600, Copper-Nickel Flanges, CuNi Flanges, Cupro Nickel Flanges
Material: CuNi 90 10 Alloy
Brand: Siddhagiri Metals and Tubes
Manufacturer: Siddhagiri Metals and Tubes
Rating: 4.3/5 based on 76 customer reviews

ASTM B151 UNS C70600 • CuNi Flange • Cupro Nickel Flanges • CuNi 90 10 Flange Supplier

We are suppliers of high-quality ASTM B151 Flanges of Copper-Nickel Grade. Copper Nickel Flanges are widely used in oil and gas piping systems. Siddhagiri Metals and Tubes is an ISO Certified and globally recognised company for ASTM B151 CuNi Flanges. Enquire For best price.

Copper Nickel Flanges are used for connecting pipes, where the connecting pieces have flanges by which the parts are bolted together. The principle of a flange is to apply a mechanical force by using bolts to preload the gasket until contact stress between flanges and gasket is sufficient to maintain a seal. Connection to the pipe is by welding or threading. To allow easy functionality and inter-changeability, these are designed to have standardised dimensions which include ANSI, ASME, DIN, EN, BS, JIS. Flanges have major applications in Oil, Gas, Petrochemical, Ship-Building, Marine, Food, Dairy, Railways and other associated industries were piping systems are required.

Copper-Nickel Slip On Flange — Slip-On Flange is slightly larger than the outer diameter of the pipe it is to be used with. The pipe is slipped into the Flange prior to welding both inside and outside. We supply a wide range of slip-On Flanges in different dimensions and sizes.

Copper-Nickel Blind Flange — Alloy Flange with no borehole are known as Blind Flange and used to close the end of the pipe. Blind Flanges are supplied as threaded or welded from class 150lb to 2500lb.

Copper-Nickel Weld Neck Flange — Alloy Weld Neck Flanges are widely used in high-pressure piping systems and can be easily recognised by the long tapered hub. The size of the bore hole is usually equal to the size of the pipe.

Copper-Nickel Socket Weld Flange — Initially developed for small high-pressure piping systems a Socket Weld Flange is similar to Slip On Flange. The flange is installed by welding around the hub of the flange.

Copper-Nickel Threaded Flange — Threaded Flanges are used for special application where the flange can be assembled to the piping system by without welding. We specialise in all forms of threaded flanges and can supply it in multiple size range.

Copper-Nickel Lap Joint Flange — Lap-Joint Flanges are similar to Slip-On flanges and are generally used with Lap-Joint Stubs. This type of flange is highly used where the piping systems are disassembled from time to time.

Siddhagiri Metals and Tubes supplies CuNi Flanges in different sizes and pressure ratings. Our production stock of cupro nickel Flanges includes size range from 1/2” to 24”, 26” to 60”, 1” to 24”, 1/2” to 24”, 12” to 60”, 26” to 48”, 21/16” to 30”, DN10 to DN3600. We have an inventory of flanges rating from Class 150 to 2500 Lbs, Class 300 to 2500 Lbs, Class 150 to 2500 Lbs, Class 150 to 900 Lbs, Class 150 to 600 Lbs, 2000 Psi to 20000 Psi, PN6 to PN 160. Our flanges conform to international dimension standards such as ASME / ANSI B16.5, ASME B16.47 / API 605, ASME / ANSI B16.36, ASME B16.48 / API 590, MSS-SP-44, BS 3293, API 6A and DIN. We stock various types of flanges which include Slip On Flange, Blind Flange, Weld Neck Flange, Socket Weld Flange, Threaded Flange, Lap Joint Flange.

We have an extensive inventory of ASME / ANSI B16.5 CuNi flanges compliment our pipe products. Most of our high quality, flanges and gasket kits are ready to ship upon request. Speak to one of our specialists and find out which flanges to meet your flange and piping specifications. We have partnered with the best Flange brands around the world to meet your flange requirements. We supply flanges from Ulma — Spain, Metalfar — Italy, Mellesi — Italy, Massoti — Italy. Moreover, we are SAUDI ARAMCO approved supplier of flanges and provide all documents including Mill Certificate along with the shipment.

Our primary export destinations include Russia, Australia, UK, Germany, US, Saudi Arabia, Qatar, Jordan, South Africa, Thailand, Canada, Mexico, Brazil and much more.

  • Flange Specification: ASTM B151 UNS C70600, ASME SB151 UNS C70600 & EN 12163
  • Dimension Standard: ASME B16.5, ANSI B16.5, ASME B16.47 / API 605, ASME B16.48 / API 590, MSS-SP-44, BS 3293, API 6A, DIN DN10 to DN3600
  • Size Range: 1/2” to 24”
  • Rating: Class 150 to 2500 Flanges | PN 6, PN 10, PN 16, PN 25, PN 40, PN 64 upto PN 160
  • Type of Flanges: CuNi 90 10 Weld-Neck Flanges, CuNi 90 10 Socket-Weld Flange, CuNi 90 10 Lap-Joint Flange, CuNi 90 10 Orifice Flange, CuNi 90 10 Tongue-Grove Flange, CuNi 90 10 Blind Flange, CuNi 90 10 Threaded Flange, CuNi 90 10 Slip-On Flange, CuNi 90 10 Spectacle Flange, CuNi 90 10 Plate Flanges
  • Form: SORF, BLRF, WNRF, SWRF, LJRF, LWNRF, RTJ, Flat Face, Ring Type, Raised Face
  • Origin: Indian Origin, European Origin, Japanese Origin
  • Testing and Documents: Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, Destructive Test Report, Non Destructive Test Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports
  • Packing: Packed in Wooden Boxes, Bubble wraps, Steel Strips Bundled, or as per Customers Requests

CuNi 90 10 Flanges in Stock

Dimension Standard Size Range Rating
ASME / ANSI B16.5 Flanges 1/2” to 24” Class 150 to 2500 Lbs
ASME B16.47 / API 605 Flanges 26” to 60” -
ASME / ANSI B16.36 Flanges 1” to 24” Class 300 to 2500 Lbs
ASME B16.48 / API 590 Flanges 1/2” to 24” Class 150 to 2500 Lbs
MSS-SP-44 Flanges 12” to 60” Class 150 to 900 Lbs
BS 3293 Flanges 26” to 48” Class 150 to 600 Lbs
API 6A Flanges 2 1/16” to 30” 2000 Psi to 20000 Psi
DIN Flanges DN10 to DN3600 PN6 to PN 160

Forms of ASTM B151 in Stock

In Stock Copper Nickel Alloy Weld Neck Flanges

Weld Neck Flange

CuNi 90 10 Weld Neck Flange available from class 150 to 2500

In Stock CuNi Tongue Groove Flanges

Tongue Groove Flange

CuNi 90 10 Tongue Groove Flanges available from PN6 to PN 160 ratings

In Stock Copper Nickel Threaded Flanges with ASME B16.5 and ANSI B16.5

Threaded Flange

CuNi 90 10 Threaded Flange available in ASME / ANSI B16.5 standards

In Stock CuNi Spectacle Flanges

Spectacle Flange

ASTM B151 CuNi 90 10 Spectacle Flange

In Stock Copper Nickel Alloy Socket Weld Flanges

Socket Weld Flange

ASTM B151 CuNi 90 10 Socket Weld Flange

In Stock CuNi Slip On Flanges

Slip On Flange

CuNi 90 10 Slip On Flange ASTM 151

In Stock Copper Nickel Orifice Flanges

Orifice Flange

CuNi 90 10 Orifice Flange available from PN6 to PN 160 ratings

In Stock CuNi Lap Joint Flanges with ASME B16.36

Lap Joint Flange

CuNi 90 10 Lap Joint Flange available in ASME B16.36 and ANSI B16.36 ASTM B151 Flanges

In Stock Copper Nickel Blind Flanges

Blind Flange

ASTM B151 CuNi 90 10 Blind Flang

  • Chemical Properties
  • Mechanical Properties
  • Physical Properties
  • Cu Pb Mn Fe Zn Ni
    MIN 88.600 - - - - 9.000
    MAX 0.050 1.000 1.800 1.000 11.000
  • Yield Strength
    0.2% Proof
    Tensile strength
    (% in 50mm)
    MIN 110 303 42.00  
    MAX 393 404   72
  • Density kg/dm³ 8.9
    Melting Range °C 1100-1145
    Specific Heat J/kg °K 377
    Thermal Conductivity W/m°K 40
    Coeff. of Linear Expansion 10-300°C 10-6/°K 17
    Electrical Resistivity microhm. cm 19
    Modulus of Elasticity GPa 135
    Modulus of Rigidity GPa 50

Properties of CuNi 90 10 alloy

Copper Nickel Cold Forming

Copper Nickel alloy is moderately formalble as compared to aluminium and Stainless steels. Many cupro nickel compionents are fabricated by simple bending methods.

CuNi 90 10 Hot Forming

Hot Forming is a breaks down the dendritic solidification microstructure preset in castings of this alloy

CuNi 90 10 Corrosion Resistance

Copper Nickel alloys are known for their corrosion resistance properties agaisnt sea-water and environments containing corrosive gases.

Copper Nickel Welding

Copper Nickel Alloys can be welded with standard peocedures and techniques.

Services We Offer


Documentation is a very important part of the products we supply, and we work continuously to enhance the efficiency of the document-handling process without compromising quality of the product. Documents provided along with the shipment include Certificate of Origin, Material Test Certificate as per EN 10204 3.1 and 10204 3.2, NACE MR10103 and NACE MR0175 certified Test Certificates.

Quality Assurance

Cupro Nickel Flanges and Fittings are manufactured and controlled to international standards such as ASTM, ASME, BS, MSS, EN, DIN or WERKSTOFFE. Our products undergo stringent quality tests before they are dispatched.

Material Testing

PMI Testing, Ultrasonic Test, Mechanical Testing, Spectro Tests for Chemical Analysis of the grade, Flaring Test, IGC, etc. are some of the tests conducted at our facility. We welcome stage wise inspection from any of your representative or third party inspection agencies.

Packing and Delivery

The product is wrapped and packed in wooden crates or carton boxes. Our primary goal is to deliver quality products in time, no matter where the client is located.

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