TOBO Industrial (Shanghai) Co., Ltd., a global leader in metal pipe fittings and flange manufacturing, has officially announced the release of its latest high-performance product: Corrosion-Resistant Copper Nickel 70/30 Flanges RJ CL1500 B564 N07060. Specifically engineered for extreme pressure and corrosive environments, these new flanges offer superior reliability, longer service life, and compliance with the most stringent industrial standards .
As industries face increasingly harsh operating environments—from offshore platforms to chemical processing plants—TOBO's new Cu-Ni 70/30 flanges are poised to set a new benchmark in high-pressure, corrosion-resistant connection solutions .
Engineered for Harsh Environments
The Copper Nickel 70/30 alloy (70% copper, 30% nickel) is renowned for its exceptional resistance to seawater corrosion, erosion, and biofouling . This material not only resists general corrosion and pitting but is also highly resistant to stress-corrosion cracking, a major concern in marine applications . The alloy exhibits outstanding performance in seawater, brine, and chemical environments, with natural resistance to barnacle growth and other biological fouling, significantly reducing maintenance costs over the system's lifecycle .
Technical data confirms that C71500 (70/30 copper-nickel) offers tensile strength ranging from 372-517 MPa and maintains excellent mechanical properties across a wide temperature range, with thermal conductivity of approximately 29 W/m-K at room temperature . The material's composition includes 29-33% nickel and 0.40-0.70% iron, which are necessary to maintain good corrosion resistance and mechanical strength .
Designed for Pressure and Precision
TOBO's latest flange release meets the ASME B564 N07060 standard, ensuring material traceability and quality consistency . With a Ring Joint (RJ) facing and a Class 1500 pressure rating, these flanges are built to withstand up to 1500 psi, making them ideal for high-pressure systems requiring leak-tight integrity .
The Ring Joint (RJ) design provides an interference seal through precision-machined grooves and a metallic ring gasket, creating a pressure-energized seal that tightens as internal pressure increases . This design is especially suited for high-temperature and high-pressure pipelines, oil refineries and gas plants, subsea wellheads and manifolds, and power generation turbines . The RJ design minimizes potential leak paths and ensures repeatable, reliable sealing—even after thermal cycling or prolonged exposure to dynamic forces .
Research has demonstrated that RTJ connections can achieve leak rates as low as 1.0 × 10⁻⁹ Pa·m³/s when properly designed and installed, confirming their effectiveness for critical applications .
Key Features and Specifications
Material: Copper Nickel 70/30 (UNS N07060), per ASTM B564
Design: Ring Joint (RJ) facing for high-seal integrity
Pressure Class: CL1500
Corrosion Resistance: Outstanding in seawater, brine, and chemical environments
Fabrication: Machined to tight tolerances for high-pressure sealing
Available Sizes: ½" to 24", with custom machining available
Tensile Strength: 372-517 MPa minimum
Yield Strength: Varies by temper, up to 483 MPa
These flanges are meticulously manufactured at TOBO's facility in Shanghai using advanced CNC machining, rigorous quality inspections, and third-party certifications to ensure consistent performance in mission-critical environments .
Why Copper Nickel 70/30?
Copper Nickel alloys, particularly 70/30 compositions, are prized in demanding industries for several key reasons :
Superior Resistance to Seawater: The 70/30 alloy resists corrosion from chlorides, sulfates, and saline water that degrade most metals over time. It also naturally prevents biological fouling, reducing maintenance costs .
High Strength and Ductility: These flanges maintain structural integrity under mechanical stress and thermal expansion, with elongation at break reaching 45% .
Thermal and Electrical Properties: Ideal for heat exchangers and power plants, the material maintains useful thermal conductivity while providing excellent corrosion resistance .
Weldability and Formability: The alloy can be welded and formed without risk of cracking, making installation and customization straightforward .
Weldability and Formability: The alloy can be welded and formed without risk of cracking, making installation and customization straightforward .
Applications Across Key Industries
TOBO's Copper Nickel 70/30 CL1500 flanges are designed for critical systems across a wide spectrum of sectors :
Marine and Naval Shipbuilding: For seawater intake and cooling systems, fire main piping, ballast lines, and hydraulic systems where corrosion resistance is paramount .
Offshore Oil & Gas Platforms: For firewater, hydraulic control, and process piping in topside and subsea applications where system failure is not an option .
Power Plants: Especially in saltwater-cooled condensers, heat exchangers, and auxiliary cooling systems .
Desalination Facilities: For highly corrosive brine environments in multi-stage flash (MSF) and reverse osmosis (RO) plants .
Chemical Processing: For pipelines handling sulfuric acid, alkalis, and corrosive slurries .
Strict Standards and Certifications
TOBO's Copper Nickel 70/30 flanges conform to international specifications, including :
ASTM B564: For wrought nickel alloy forgings
ASME B16.5: For pipe flanges and flanged fittings (covering dimensions for sizes ½" to 24")
UNS N07060: For chemical composition verification
ISO 9001:2015: For quality management systems
Each product undergoes strict dimension and pressure testing, spectrochemical analysis, positive material identification (PMI), hydrostatic pressure testing, ultrasonic and radiographic testing as required, and hydrostatic inspection . Material test certificates are provided upon request.
For marine and defense industry customers, TOBO also supports third-party inspection from agencies like BV, DNV, ABS, and SGS, ensuring global compliance and peace of mind .
Sustainability and Lifecycle Value
Beyond performance, Copper Nickel alloys offer exceptional lifecycle value. Because these materials resist corrosion and fouling without chemical coatings or cathodic protection, they require significantly less maintenance over time . This reduces both operating costs and environmental impact, especially in ecologically sensitive zones like oceans and coastal waters .
Additionally, Copper Nickel is fully recyclable, making it an attractive material choice for engineers and procurement managers looking to meet sustainability goals without compromising on performance .
Competitive Pricing and Customization
By leveraging bulk copper-nickel alloy procurement and automated production lines, TOBO offers competitive factory-direct pricing on its entire 70/30 Cu-Ni flange range .
Customization options include :
Different flange face types (RJ, RF, FF)
Bolt-hole configurations
Heat number stamping and logo branding
Coating and anti-seize treatment options
OEM packaging and palletization for export
TOBO's engineering team also supports special request production, including small-batch orders for urgent ship repairs or plant shutdowns .
A Trusted Partner for Global Projects
With exports to over 60 countries, TOBO Industrial is a trusted partner for engineering contractors, shipyards, and energy firms worldwide. The company's Shanghai-based headquarters offers full-cycle services, from consultation and CAD drawing support to shipping and documentation .
Clients benefit from :
24/7 technical assistance
Multilingual sales support
On-time delivery backed by export experience
Competitive Incoterms (FOB, CFR, CIF)
Seamless logistics and customs clearance
According to Mr. Zhao Liang, TOBO's Chief Technical Officer, "Our new Copper Nickel 70/30 RJ Class 1500 flanges are the result of extensive research and field testing. We've developed these to serve industries where failure is not an option. Whether you're managing a naval fleet or operating an offshore platform, these flanges provide the strength and peace of mind you need" .
Conclusion
In today's global infrastructure landscape, reliability, longevity, and cost-effectiveness are more important than ever. TOBO's Corrosion-Resistant Copper Nickel 70/30 Flanges RJ CL1500 B564 N07060 meet all three demands . Combining elite material science with precision machining and industrial know-how, these flanges are not just components—they are critical system enablers .
Whether you are outfitting a new vessel, upgrading a refinery, or constructing a high-performance desalination plant, TOBO's Cu-Ni 70/30 flanges are engineered to deliver confidence and continuity—even in the harshest conditions .
About TOBO Industrial (Shanghai) Co., Ltd.
TOBO is a professional manufacturer and exporter of precision-engineered metal products based in Shanghai, China. With robust production capacity and a commitment to metallurgical excellence, TOBO serves customers worldwide across marine, energy, chemical, and industrial sectors. For over a decade, TOBO has built its reputation on delivering reliable, high-performance metal components to customers across 50+ countries, with state-of-the-art manufacturing facilities and in-house metallurgical expertise .