TOBO Industrial (Shanghai) Co., Ltd., a global leader in piping systems and metal fittings, has announced the expansion of its non-ferrous product line with the introduction of factory-direct high-strength ANSI standard brass and copper-nickel alloy round flange plates. Available in both forged and cast constructions with fully customizable sizing, this comprehensive offering is engineered to meet the demanding requirements of marine, oil & gas, HVAC, desalination, and power generation sectors worldwide .
Material Excellence: Brass and Copper-Nickel Alloys for Demanding Environments
The new flange range leverages the distinct advantages of premium copper-based alloys, which have been trusted for decades in demanding corrosive environments. These materials deliver exceptional performance where standard carbon steel or stainless steel alternatives may fall short .
Brass Alloy Flanges – Versatile and Corrosion-Resistant:
Brass flanges offer excellent corrosion resistance, good strength, and outstanding machinability, making them ideal for a wide range of industrial applications. Available in various brass compositions, these flanges are suitable for water, air, natural gas, oil, and steam services, with pressure ratings typically up to 225 psi depending on size and configuration .
Copper-Nickel 90/10 (C70600) – The Versatile Marine Workhorse:
This alloy, comprising approximately 90% copper and 10% nickel with controlled iron and manganese additions, is the most widely used wrought copper alloy for marine engineering applications . Key characteristics include:
Outstanding Seawater Corrosion Resistance: Exhibits extremely low general corrosion rates, typically below 0.025 mm per year, significantly outperforming standard stainless steels in chloride-rich environments
Natural Biofouling Resistance: The alloy's surface chemistry inherently inhibits marine growth, reducing maintenance requirements in seawater systems
Good Mechanical Properties: Maintains excellent strength and ductility across a wide temperature range
Applications: Seawater cooling systems, desalination plants, marine piping, and power plant condensers
Copper-Nickel 70/30 (C71500) – The Premium Grade for Maximum Performance:
The 70/30 alloy contains 29-33% nickel with 0.4-1.0% iron, delivering enhanced properties for the most demanding service conditions . This premium alloy offers:
Superior Corrosion Resistance: Offers the best resistance to aqueous corrosion among commercial copper alloys, with exceptional resistance to stress corrosion cracking and impingement attack in high-velocity seawater
Exceptional Strength: Significantly stronger than the 90/10 grade, enabling thinner walls while maintaining pressure integrity
High-Temperature Stability: Maintains mechanical properties in continuous service up to 400°C
Applications: Offshore oil and gas platforms, naval vessels, chemical processing equipment, and critical heat exchangers
ANSI Standard Compliance: The Quality Benchmark
All TOBO flanges are manufactured to meet or exceed rigorous ANSI/ASME B16.5 standards, the globally recognized specification for pipe flanges and flanged fittings . Compliance ensures:
Dimensional Precision: Strict tolerances on flange outside diameter, bolt circle diameter, and thickness for perfect fit in system assemblies
Pressure Integrity: Available in pressure classes from 150 to 2500, accommodating a wide spectrum of service requirements
Global Interchangeability: Seamless integration with components from any compliant manufacturer worldwide
Quality Assurance: Full material traceability and certification
Forged vs. Cast Construction: Application-Specific Selection
TOBO offers both forged and cast flange constructions, each with distinct advantages for specific applications:
Forged Flanges – The Integrity Advantage:
Refined Grain Structure: Forging aligns the metal's grain flow to follow the shape of the flange, eliminating porosity and internal voids common in castings
Superior Strength and Density: The homogeneous microstructure provides higher mechanical strength, better impact resistance, and greater ductility
Enhanced Fatigue Resistance: Essential for components in systems experiencing constant thermal expansion and pressure cycling
Ideal Applications: High-pressure, high-temperature, and cyclic loading services where joint integrity is paramount
Cast Flanges – Cost-Effective Versatility:
Complex Geometries: Casting allows for intricate shapes and configurations
Cost-Effective: Suitable for large-diameter and lower-pressure applications
Material Flexibility: Accommodates a wide range of alloy compositions
Ideal Applications: General service, low-to-medium pressure systems, and applications requiring complex flange geometries
Customized Sizing: Tailored to Project Specifications
A key feature of TOBO's offering is full customization capability. Clients can specify:
Non-Standard Dimensions: Custom outside diameters, bolt circles, hub thicknesses, and bore sizes to match proprietary equipment or legacy systems
Size Range: Available from 1/2 inch to 120 inches (DN15 to DN3000) and beyond
Pressure Classes: Class 150, 300, 400, 600, 900, 1500, and 2500
Flange Types: Weld Neck (WN), Slip-On (SO), Blind (BL), Socket Weld (SW), Threaded (TH), and reducing configurations
Facing Options: Raised Face (RF), Flat Face (FF), and Ring-Type Joint (RTJ)
Manufacturing Excellence and Quality Assurance
TOBO's state-of-the-art manufacturing facilities employ advanced production processes to ensure consistent quality:
Precision Forging:
Hot forging operations with controlled deformation of copper-nickel billets at elevated temperatures
Precision CNC machining achieving exact dimensional specifications
Solution annealing heat treatment to optimize microstructure and corrosion resistance
Quality Assurance Protocols:
Material Certification: Mill Test Reports (MTRs) verifying chemical composition and mechanical properties per ASTM/ASME standards
Non-Destructive Testing: Ultrasonic examination, positive material identification (PMI), liquid penetrant testing, and radiographic examination available
Dimensional Verification: Precision measurement ensuring compliance with ANSI B16.5 specifications
Third-Party Inspection: SGS, TUV, BV, DNV, or customer-appointed agencies available upon request
TOBO operates in accordance with ISO 9001:2015 quality management systems, ensuring consistent product quality and complete traceability for regulated industries .
Industry Applications Across Critical Sectors
These high-strength brass and copper-nickel flanges serve essential functions across diverse industries:
Marine and Offshore Engineering:
Seawater cooling systems and fire-fighting pipelines
Ballast water management systems
Offshore platform piping and subsea equipment
Oil and Gas Industry:
Seawater injection lines for reservoir pressure maintenance
Topside and subsea cooling water systems on platforms and FPSO vessels
Process piping and firewater systems
Power Generation:
Steam condenser tubing in coastal and nuclear power plants
Feedwater heaters and heat exchangers
Cooling water systems for thermal power stations
Desalination and Water Treatment:
Multi-stage flash (MSF) evaporator connections
Reverse osmosis (RO) plant high-pressure piping
Brine heater and heat recovery sections
Chemical and Process Industries:
Heat exchanger connections for corrosive media
Process piping in chemical plants handling aggressive fluids
Pollution control systems and industrial water treatment
Factory-Direct Advantages
As a vertically integrated manufacturer, TOBO offers significant benefits to global customers:
Competitive Pricing: Elimination of intermediary markups delivers exceptional value for volume purchases
Quality Assurance: Direct control over manufacturing processes ensures consistent product quality
Customization Capabilities: Full engineering support for custom dimensions and configurations
Flexible Minimum Orders: Accommodating both small-batch prototype requirements and large-volume production needs
Global Standards Compliance
TOBO's brass and copper-nickel flanges meet or exceed international requirements:
ANSI/ASME B16.5: Dimensional standards for pipe flanges and flanged fittings
ASTM B151 / ASME SB151: Standard specification for copper-nickel alloy plate and sheet
DIN, EN, JIS, and BS: Available upon request for specific market requirements
RoHS and REACH: Environmental compliance for restricted substances
Conclusion: Setting the Standard for Copper Alloy Flanges
The introduction of factory-direct high-strength ANSI standard brass and copper-nickel alloy round flange plates with forged and cast options and customized sizing represents TOBO's commitment to providing comprehensive, high-performance solutions for the most demanding fluid transport applications. By combining proven corrosion resistance, precision manufacturing, and full international certification, TOBO enables engineers, procurement specialists, and project managers to specify with confidence for critical applications across marine, energy, chemical, and industrial sectors.
Whether specified for seawater cooling systems, chemical processing facilities, or high-pressure process connections, these flanges deliver the durability, reliability, and performance that modern industry demands.
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. The company specializes in copper alloys, copper-nickel alloys, stainless steels, and associated products for demanding applications, with strict quality control and complete traceability.