Super Duplex Steel Flanges

Need a dependable super duplex flange? Super Duplex Steel Flanges on MetalMitra come in all standard face types and pressure classes to ASTM A182, ready for reliable pipe-to-pipe and pipe-to-equipment joints.

Super Duplex Steel Flanges are forged or machined components used to connect pipes, valves, pumps and equipment, allowing easy assembly, inspection and maintenance of piping systems.

Super duplex stainless steel combines a balanced austenitic-ferritic microstructure with high chromium, molybdenum and nitrogen content, giving very high strength and excellent resistance to pitting, crevice corrosion and chloride stress corrosion cracking.

Available forms & variants

• Weld Neck Flanges — Butt-welded flanges for high-pressure and high-temperature service.
• Slip On Flanges — Slip over the pipe for easy alignment and welding.
• Blind Flanges — Solid flanges used to close pipe ends and openings.
• Socket Weld & Threaded Flanges — Compact connections for smaller bore piping.
• Lap Joint Flanges — Used with stub ends for easy alignment.
• Spectacle & RTJ Flanges — Positive isolation and high-pressure sealing.

Performance highlights

• High Strength — Roughly twice the yield strength of standard austenitic stainless steels.
• Chloride Resistance — Excellent resistance to pitting and crevice corrosion in seawater and brine.
• Stress Corrosion Resistance — Strong resistance to chloride stress corrosion cracking.
• Weight Saving — Higher strength allows lighter designs in suitable applications.

Typical applications

• Offshore Oil & Gas
• Seawater Systems
• Desalination Plants
• Chemical Processing
• Petrochemical
• Pulp & Paper
• Marine Engineering
• Heat Exchangers
• Pollution Control
• Subsea Equipment
• Fabrication
• General Engineering

Quality checks & certification

Every lot of Super Duplex Steel Flanges sourced through MetalMitra can be inspected and documented to the governing standard and your purchase order.

• Dimensional inspection
• Visual and surface inspection
• Grade verification against the order
• Chemical composition verification
• Mechanical testing as applicable
• Flange face and bolt-hole inspection
• Non-destructive testing as applicable
• EN 10204 3.1 Mill Test Certificate
• Third-party inspection (TPI) on request

Material properties

Chemical composition and mechanical properties are supplied to the limits of the governing material standard. Actual heat values are reported on the mill test certificate shared with each consignment.

Why buy through MetalMitra

• Verified suppliers — Mills, manufacturers and stockists are reviewed by the MetalMitra team before they list.
• One RFQ, several quotes — Share size, grade and quantity once and compare offers side by side.
• Full traceability — Heat numbers, EN 10204 3.1 MTCs and third-party inspection on request.
• Delivered worldwide — Export-worthy packing and shipping to India, the Middle East, Africa, Europe and the Americas.

Ready to buy?

Send your size, grade, quantity and delivery location for Super Duplex Steel Flanges, and matching suppliers on MetalMitra will come back with offers.

Technical note: Values on this page are for reference. Always confirm against the governing standard, your purchase specification and the mill test certificate.