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B-19, C P Tank, Mumbai - 400004
Technolloy Inc offers Duplex Steel S31803/S32205 Flanges engineered for demanding industrial piping and equipment applications where high mechanical strength, corrosion resistance, and dependable service life are essential. Duplex S31803 and S32205 stainless steels combine austenitic and ferritic metallurgical structures, providing a balanced combination of toughness, strength, and resistance to aggressive environments. These flanges are manufactured in different configurations, dimensions, pressure classes, and connection types to meet project-specific piping requirements. Their performance makes them suitable for industries handling seawater, chlorides, chemicals, hydrocarbons, process fluids, and other corrosive media.
Duplex Steel S31803/S32205 Flanges are precision-engineered pipe components used to connect pipes, valves, pumps, vessels, and other equipment while providing a secure and serviceable joint. S31803 is the traditional UNS designation associated with 2205 duplex stainless steel, while S32205 represents the tighter-composition version commonly supplied as UNS S32205. The material contains chromium, molybdenum, and nitrogen, which contribute to its excellent resistance against pitting, crevice corrosion, and stress corrosion cracking.
These flanges are available in configurations such as weld neck, slip-on, blind, socket weld, threaded, lap joint, and other customized designs depending on the piping system. They can be produced according to recognized dimensional and material standards, including ASME, ASTM, and related international specifications. The appropriate flange design is selected according to pipe size, pressure rating, temperature, fluid characteristics, joining method, and operating conditions.
Duplex S31803/S32205 provides higher yield and tensile strength than many conventional austenitic stainless steels. This strength allows flanges to withstand significant mechanical loads, internal pressure, vibration, and demanding operating conditions. The combination of strength and toughness helps engineers design robust piping connections without unnecessarily increasing material thickness.
A major advantage of Duplex Steel S31803/S32205 Flanges is their resistance to corrosion in chloride-containing and chemically aggressive environments. Their chromium, molybdenum, and nitrogen content supports resistance to pitting and crevice corrosion, while the duplex structure offers strong resistance to chloride stress corrosion cracking. This makes the material particularly valuable for marine, offshore, chemical processing, and petrochemical applications.
Duplex flanges are designed for long-term performance where equipment may be exposed to pressure cycling, corrosive fluids, elevated temperatures, and mechanical stress. Their strong metallurgical structure helps reduce premature degradation and supports reliable operation over extended service periods. Proper material selection, fabrication, welding, and installation are essential for achieving the expected service performance.
Although duplex stainless steel requires controlled machining practices because of its strength and work-hardening characteristics, it can be machined and fabricated effectively using suitable tooling, speeds, feeds, and cooling methods. Technolloy Inc can supply flanges manufactured to specified dimensions and connection requirements, supporting accurate installation and compatibility with existing piping systems.
The higher initial material cost of duplex stainless steel can be offset by its strength, corrosion resistance, and extended service life. Its ability to perform reliably in harsh environments can reduce replacement frequency, maintenance requirements, corrosion-related downtime, and lifecycle expenses. For critical piping systems, this combination of performance and durability can provide strong overall cost efficiency.
Duplex Steel S31803/S32205 Flanges provide dependable performance when correctly specified for the operating environment. Their balanced mechanical and corrosion-resistant properties make them a practical choice for piping systems where reliability, safety, and service longevity are important. Consistent manufacturing quality and compliance with applicable specifications further support predictable performance in industrial service.
Duplex Steel S31803/S32205 Flanges Manufacturers serve oil and gas projects requiring reliable connections for pipelines, separators, pressure equipment, offshore platforms, and processing systems. The material's resistance to chlorides, hydrocarbons, and demanding mechanical loads makes these flanges suitable for upstream, midstream, and downstream environments where piping integrity is critical.
Duplex Steel S31803/S32205 Flanges Suppliers provide components for petrochemical plants where process fluids, pressure, and corrosive conditions can place significant demands on piping connections. These flanges can be used with reactors, heat exchangers, storage systems, pumps, and process pipelines when the selected grade and configuration meet the application's operating requirements.
Duplex Steel S31803/S32205 Flanges Stockists support marine and offshore requirements where seawater and chloride exposure can accelerate corrosion in conventional materials. Duplex flanges are used in seawater piping, offshore production systems, desalination equipment, ballast systems, and other marine installations requiring strong corrosion resistance and mechanical reliability.
Duplex Steel S31803/S32205 Flanges Exporters supply piping components for chemical processing facilities handling aggressive fluids and corrosive process environments. Their combination of strength and resistance to localized corrosion makes them appropriate for selected chemical transfer lines, process equipment, tanks, pumps, and related piping assemblies.
Duplex S31803/S32205 flanges are widely suited to water treatment and desalination systems where chloride-rich water can challenge standard stainless steel grades. They can be used around pumps, filtration systems, reverse osmosis equipment, seawater intake systems, and associated process piping when the material is properly selected for the specific water chemistry.
Power generation facilities can use duplex flanges in auxiliary piping, cooling-water systems, process equipment, and other installations exposed to corrosive fluids or demanding mechanical conditions. Their high strength and corrosion resistance can support reliable connections in systems where maintenance access may be limited and equipment uptime is important.
Technolloy Inc focuses on supplying industrial flange solutions for applications where material performance and dimensional accuracy are important. Duplex S31803/S32205 flanges can be produced or supplied to suit international project requirements, with attention to material traceability, specifications, dimensions, and application conditions. For global buyers, engineers, fabricators, and procurement teams, selecting the correct flange grade and configuration helps improve piping reliability while supporting long-term operational value.
Technolloy Inc can supply Duplex Steel S31803/S32205 Flanges in project-specific sizes, pressure classes, face configurations, bore dimensions, and connection styles. Manufacturing and inspection requirements can be aligned with applicable customer specifications and recognized industry standards. Material certificates, dimensional inspection, testing, marking, surface finish, packaging, and documentation can be arranged according to project requirements.
| Specification | ASTM A182 / ASME SA182 |
|---|---|
| Dimension Standard | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Size | 1/2" (15 NB) to 48" (1200NB) |
| Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| DIN Flanges | DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673. |
| JIS Flanges | JIS B2220 5K, JIS B2220 10K, JIS B2220 16K, JIS B2220 20K |
| BS Flanges | BS4504 PN 6, BS 4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS 4504 PN 64, BS 4504 PN 100, BS 4504 PN 160, BS 4504 PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H. |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| 2205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 - 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
| 32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 - 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
| 31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 - 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
| Grades | Density (g/cm 3) | Melting Point | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min |
|---|---|---|---|---|---|
| 2205 | 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
| 32205 | 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
| 31803 | 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
S32205 has a tighter and more controlled chemical composition than the original S31803 specification and is commonly associated with modern 2205 duplex stainless steel products. Both grades provide high strength and strong resistance to corrosion, but the applicable material specification should be confirmed against the project requirement.
Common requirements may include ASME B16.5 or ASME B16.47 for flange dimensions and ASTM A182 for forged stainless steel flange materials, depending on the product type and application. The exact standard should be specified according to the engineering and purchasing requirements.
Duplex S31803/S32205 offers strong resistance to chloride-related corrosion and is used in selected marine and seawater systems. Suitability depends on seawater chemistry, temperature, flow conditions, design requirements, fabrication quality, and the specific service environment.
Yes, duplex flanges can be supplied according to required dimensions, pressure ratings, facing types, bore sizes, connection configurations, standards, and inspection requirements. Custom requirements should be confirmed against the project's engineering drawings and applicable specifications.
Pricing depends on flange size, pressure class, material quantity, configuration, manufacturing method, machining requirements, testing, certification, order volume, and prevailing raw material costs. An indicative price may start around USD 8 per kilogram, while the final quotation is determined by the exact product specification and customer requirements.
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