Duplex Steel Flanges

M Metal Tubes India Pvt Ltd is a leading manufacturer, stockist, and exporter of Duplex Steel UNS S31803 Flanges with over 40 years of industry expertise. Our flanges are engineered from ferritic-austenitic Duplex Stainless Steel, offering twice the strength of standard austenitic steel flanges with excellent resistance to pitting, stress corrosion cracking, and high-temperature scaling.

About Duplex Steel UNS S31803

Duplex UNS S31803 (Werkstoff Nr. 1.4462) is a nitrogen-enhanced stainless steel combining the qualities of ferritic and austenitic grades. It provides exceptional mechanical strength, enhanced weldability, and superb corrosion resistance, making it ideal for demanding industrial applications.

Range of Duplex Steel UNS S31803 Flanges

We supply a wide variety of Duplex Steel Flanges in standard and customized dimensions that meet ASTM A182 / ASME SA182 specifications:

• Blind Flanges (BLRF) – For closing ends of piping systems with a tight, corrosion-resistant seal.
• Slip-On Flanges – Easy to align and weld, ideal for low-pressure pipelines.
• Threaded Flanges – Provide a secure fit in high-pressure environments without welding.
• Plate Flanges – Cost-effective and used in various process piping systems.
• Socket Weld Flanges – Designed for small-diameter, high-pressure pipelines.
• Lap Joint Flanges – Excellent for systems that require frequent disassembly.
• Ring Type Joint (RTJ) Flanges – Ensure leak-proof sealing in high-pressure and temperature systems.
• Weld Neck Flanges (WNRF) – Best suited for high-stress applications.

Key Features of Our Duplex Flanges

• High tensile and yield strength
• Superior resistance to chloride-induced stress corrosion
• Excellent weldability and formability
• Dimensional precision and durability
• Fully compliant with ASTM, ASME, DIN, and EN standards

Applications

Our UNS S31803 Duplex Steel Flanges are trusted across global industries such as:

• Petrochemical and Refining
• Oil & Gas Exploration
• Offshore and Marine Structures
• Pharmaceutical and Food Processing
• Power Generation
• Water Treatment and Desalination Plants

Why Choose M Metal Tubes India Pvt Ltd?

• Global Reach – Exporting premium Duplex Flanges to over 50 countries
• In-House Quality Testing – Ensures each flange meets the highest international standards
• Custom Orders – Tailored dimensions and types to suit specific industrial needs
• Affordable Solutions – Competitive pricing without compromising on quality

Looking for corrosion-resistant and high-strength flanges? Contact us now to get the best deals on Duplex Steel UNS S31803 Flanges that are globally trusted and ISO-compliant.

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