Copper Nickel Flanges

Copper Nickel Flanges

ARK Stainless Inc. is a trusted manufacturer and supplier of premium-quality Copper Nickel Flanges, engineered for excellent durability and outstanding corrosion resistance in seawater and harsh environments. These flanges are widely used in industries such as marine engineering, shipbuilding, desalination plants, and offshore oil & gas, where resistance to biofouling and stress corrosion cracking is critical.

Our Copper Nickel Flanges are produced using high-grade materials like Copper Nickel 70/30 (C71500) and Copper Nickel 90/10 (C70600), ensuring superior mechanical strength, excellent corrosion resistance, and long-lasting performance. Available in a variety of types including Slip-On, Weld Neck, Blind, Socket Weld, Threaded, and Lap Joint, these flanges are manufactured according to international specifications such as ASTM B151 / ASME SB151 and dimensional standards like ASME B16.5, B16.47, and MSS-SP-44.

Copper Nickel Flanges from ARK Stainless Inc. are ideal for high-pressure and high-temperature applications, providing an excellent balance of strength, thermal conductivity, and corrosion resistance in challenging environments. Every flange undergoes strict quality testing to ensure exceptional performance, reliability, and longevity in critical operations.

Table of Contents

• ➤ Copper Nickel 70/30 Flanges
• ➤ Copper Nickel 90/10 Flanges

Copper Nickel 70/30 Flanges

Copper Nickel 70/30 Flanges are extensively utilized across multiple industries, ranging from marine engineering and power generation to chemical processing and the energy sector. Their presence in critical applications like power plants and offshore installations highlights their superior quality and dependable performance under harsh operational conditions.
Copper Nickel 70/30 Flanges are manufactured using premium-grade Copper Nickel Cu-Ni 70/30 (C71500) material, ensuring exceptional strength, corrosion resistance, and durability. These flanges are available in various types, including Plate, Screwed, Threaded, and Forged flanges, and are produced in accordance with high international standards such as ASTM A213 and ASTM A269. Available in sizes approximately from ½" to 12", with pressure classes of 150, 300, 600, 900, 1500, and 2500 LBS DIN, they are engineered to meet the stringent requirements of critical industrial sectors.
The chemical and mechanical properties of Copper Nickel 70/30 Flanges significantly enhance their durability and performance. Each flange undergoes rigorous quality checks, including mechanical testing of tensile strength, chemical analysis, flattening tests, micro and macro examinations, ensuring that only the highest quality products are delivered to our customers.

70/30 Cupro Nickel Flanges Equivalent Grades

Specification of Nickel 70/30 Flanges

• Specification: ASTM B151 / ASME SB151
• Dimension Standard: ANSI/ASME B16.5, B16.47 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: Flat 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, BS4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS4504 PN 64, BS4504 PN 100, BS4504 PN 160, BS4504 PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H

Copper Nickel 90/10 Flanges

Copper Nickel 90/10 Flanges are primarily used in industries such as power generation, gas processing, and pharmaceuticals, where the need for high-quality, reliable components is critical. These flanges are tested multiple times to ensure their suitability and superior performance under demanding service conditions.
To guarantee quality and compliance, Copper Nickel 90/10 Flanges undergo rigorous testing processes including flattening tests, intergranular corrosion tests, hardness tests, and positive material identification (PMI) tests. These tests ensure the product’s purity, strength, and resistance to corrosive environments, making them highly trusted for industrial use.
Moreover, complete and precise documentation accompanies each batch, including commercial invoices with HS codes, raw material reports, heat treatment charts, guarantee letters, and more—offering full transparency and assurance to customers.
These flanges are available in sizes ranging from ½" to 36", with specifications such as ASTM/ASME SB 61/62. They are manufactured according to dimensional standards including ANSI/ASME B16.5, B16.48, BS4504, BS 10, EN-1092, DIN, and others, ensuring compatibility across a wide range of applications.

90/10 Cupro Nickel Flanges Equivalent Grades

Specification of Nickel 90/10 Flanges

• Specification: ASTM B151 / ASME SB151
• Dimension Standard: ANSI/ASME B16.5, B16.47 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" (1200 NB)
• Class / Pressure: 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64, etc.
• Flange Face Type: Flat 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, BS4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS4504 PN 64, BS4504 PN 100, BS4504 PN 160, BS4504 PN 250, BS10, BS Table D, BS Table E, BS Table F, BS Table H