Duplex Steel Flanges
Duplex Steel Flanges
High-quality Duplex Steel Flanges manufactured for secure, leak-tight pipe connections in pressure piping and process systems.
- Weld Neck
- Slip On
- Blind
- Socket Weld
- Threaded
- Lap Joint
- RTJ
Duplex Steel Flanges Manufacturer in India
Sawariya Metal Industries is a manufacturer, supplier, stockist and exporter of Duplex Steel Flanges in different sizes, grades, specifications and finishes for industrial and engineering applications.
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.
Duplex stainless steel has a two-phase austenitic-ferritic structure that delivers higher strength than standard austenitic grades together with good resistance to pitting, crevice corrosion and chloride stress corrosion cracking.
Typical applications for Duplex Steel Flanges include oil & gas, chemical processing, petrochemical, desalination, marine applications, pulp & paper, heat exchangers, pressure vessels and general engineering.
Key Features of Duplex Steel Flanges
High Strength
Higher yield strength than conventional 300-series stainless steels.
Corrosion Resistance
Good resistance to pitting, crevice and general corrosion.
SCC Resistance
Improved resistance to chloride stress corrosion cracking.
Cost Efficient
Strength and durability help reduce material and lifecycle cost.
Duplex Steel Flanges Specifications
| Parameter | Specification |
|---|---|
| Specifications | ASTM A182 / ASME SA182 |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc |
| Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc |
| Grade | ASTM A182 / ASME SA182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61, UNS S31803, UNS S32205 |
| Size | 1/8" NB TO 24" NB |
| Class | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc |
| Flange Face Type | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
Equivalent Grades of Duplex Steel Flanges
| STANDARD | WERKSTOFF NR | UNS |
|---|---|---|
| Duplex 1803 | 1.4462 | S31803 |
| Duplex 2205 | 1.4462 | S32205 |
Types of Duplex Steel Flanges
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.
Applications & Industries
- Oil & Gas
- Chemical Processing
- Petrochemical
- Desalination
- Marine Applications
- Pulp & Paper
- Heat Exchangers
- Pressure Vessels
- Water Treatment
- Offshore Platforms
- Fabrication
- General Engineering
Quality & Inspection
Quality-Focused Manufacturing & Supply
Duplex Steel Flanges can be supplied with inspection, testing and documentation according to the applicable specification and customer purchase requirements.
- Dimensional inspection
- Visual and surface inspection
- Material grade verification
- Chemical composition verification
- Mechanical testing as applicable
- Flange face and bolt-hole inspection
- Non-destructive testing as applicable
- Mill Test Certificate (MTC)
- Third-party inspection support
Why Choose Our Duplex Steel Flanges?
Multiple Pressure Classes
150# to 2500# and PN ratings.
All Flange Types
Weld neck, slip on, blind, socket weld and more.
Accurate Machining
Precise facing and drilling for leak-tight joints.
Custom Flanges
Manufactured as per drawings on request.
Duplex Steel Flanges Manufacturer, Supplier & Exporter
Sawariya Metal Industries supplies Duplex Steel Flanges for domestic and international projects in a wide range of sizes, grades and specifications. Products can be supplied in standard and custom dimensions according to drawings and purchase order requirements.
Every order can be supported with Mill Test Certificates, inspection reports, third-party inspection on request and secure export-worthy packaging.
Share your size, grade, quantity and specification requirements with our team to receive a competitive quotation for Duplex Steel Flanges.
Related Duplex Steel Products Products
Duplex Steel Buttweld Pipe Fittings
Duplex Steel Buttweld Pipe Fittings are welded pipe fittings that are bevelled and butt-welded to the pipe, creating a continuous, high-strength and leak-resistant connection with smooth internal flow.
Duplex Socket weld Pipe Fittings
Duplex Socket weld Pipe Fittings are forged small-bore pipe fittings with socket weld or threaded ends, manufactured to ASME B16.11 for high-pressure piping and instrumentation lines.
Duplex Steel Valves
Duplex Steel Valves are flow-control devices used to start, stop, regulate or prevent backflow of liquids and gases in process and utility piping.
Technical Note: Technical values should be verified against the applicable ASTM / ASME / EN specification, purchase order requirements and Mill Test Certificate (MTC) for the supplied product.