Duplex Steel So Flanges
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Flange Materials
Duplex Steel So Flanges
High strength combined with excellent corrosion resistance
Duplex Flanges are manufactured from a dual-phase stainless steel that combines austenitic and ferritic microstructures, giving the material significantly higher strength than standard stainless steel along with strong resistance to stress corrosion cracking and chloride attack.
Royal Steel India manufactures Duplex Flanges in UNS S31803 (2205) and S32205 grades for offshore, marine and chemical process piping where both strength and corrosion resistance are critical.
Key Features
- Almost double the strength of standard austenitic stainless steel
- High resistance to stress corrosion cracking
- Excellent resistance to chloride-induced pitting
- Good weldability with matched consumables
- Reduces flange thickness and weight versus stainless steel
- Long service life in aggressive environments
Standards Followed
- ASME B16.5
- ASME B16.47
- ANSI
- DIN
- EN 1092-1
- BS
- JIS
Applications
Industries and sectors that rely on our Duplex Steel So Flanges.
- Oil & Gas Industry
- Petrochemical Plants
- Chemical Processing
- Power Plants
- Marine & Offshore
- Water Treatment Plants
- Food & Beverage Industry
- Pharmaceutical Industry
- Paper & Pulp Industry
- Construction Projects
Why Choose Royal Steel India?
Royal Steel India manufactures and supplies Duplex Steel So Flanges that are precision-engineered, rigorously tested, and backed by mill test certificates for full traceability. Every batch is manufactured to meet international quality standards and the specific requirements of your project.
Whether you need standard sizes or custom specifications, we offer competitive pricing, reliable stock availability, and timely delivery for domestic and export orders.
Frequently Asked Questions
What makes Duplex Flanges different from stainless steel flanges?
Duplex steel has a dual austenitic-ferritic structure that gives it roughly double the yield strength of standard stainless steel along with superior chloride corrosion resistance.
Where are Duplex Flanges commonly used?
They are used in offshore platforms, marine piping, desalination plants and chemical process units exposed to chlorides.
Which duplex grades do you supply?
We supply UNS S31803 (2205) and S32205 grade duplex steel flanges.
Need a Quote on Duplex Steel So Flanges?
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