Duplex flanges are essential components used in piping systems made from duplex stainless steel material. These flanges are designed to connect pipes, valves, fittings, or other equipment together, creating a secure and sealed joint in various industrial applications.
Duplex flanges are made from duplex stainless steel, a material known for its excellent combination of strength and corrosion resistance. This type of steel comprises a balanced microstructure of austenite and ferrite phases, offering superior performance in challenging environments.
Duplex flanges come in various types, each with specific features catering to different requirements:
Weld Neck Flanges: Designed for high-pressure applications, these flanges have a long neck and are welded to pipes.
Slip-On Flanges: Easy to install, they slide over the pipe and are then welded in place.
Socket Weld Flanges: These connect with pipes using a socket and are suitable for smaller sizes and high-pressure applications.
Blind Flanges: Used to close the ends of pipes, valves, or pressure vessel openings.
Threaded Flanges: These flanges have threads for connection and are commonly used in low-pressure applications.
Lap Joint Flanges: Used with a stub end, allowing easy alignment and adjustment in the piping system.
Duplex flanges conform to international standards such as ASTM, ASME, ANSI, DIN, and others. These standards ensure compatibility, quality, and reliability across various industries and applications.
Duplex flanges find applications in industries such as oil and gas, petrochemicals, chemical processing, marine, desalination, pulp and paper, and more. They are utilized where there's a need for strong, corrosion-resistant connections in piping systems.
When choosing duplex flanges, factors like pressure ratings, size, facing dimensions, temperature, and the specific environment where they'll be used should be considered to ensure optimal performance and longevity.
Duplex stainless steel provides exceptional resistance to corrosion, including pitting, crevice corrosion, and stress corrosion cracking. This resistance makes duplex flanges highly suitable for applications involving harsh or corrosive fluids such as seawater, chemicals, and acidic solutions.
