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Below is a fresh version for Duplex Steel S31803 Flanges, keeping the same professional depth while making the wording natural and distinct.
Jai Hind Metal is a trusted manufacturer and supplier of Duplex Steel S31803 Flanges, providing strong and corrosion-resistant piping components for industries operating in demanding service environments. We understand that flange requirements can vary depending on the application, including size, thickness, dimensions, pressure rating, facing type, material specifications, and applicable manufacturing standards. Our Duplex Steel S31803 Flanges are manufactured according to customer requirements, with close attention to dimensional accuracy, material quality, surface condition, and overall workmanship. Throughout the manufacturing process, quality checks are carried out to maintain consistency, while finished flanges are inspected for dimensions, surface finish, appearance, and product quality before dispatch. Third-party inspection can also be arranged when required for specific projects, purchase orders, or quality verification. With organized stock management and suitable storage facilities, we can accommodate both regular requirements and larger quantities for industrial projects.
We also recognize that careful packaging and handling play an important role in maintaining the condition of Duplex Steel S31803 Flanges after manufacturing. Each finished flange is suitably packed with protective materials to reduce the possibility of scratches, moisture exposure, contamination, and damage during handling or transportation. Customized packaging, product identification, labeling, and additional protection can be provided when specified by the customer or required for particular shipping conditions. Our dispatch team coordinates with reliable logistics providers to help manage transportation efficiently and ensure that orders are prepared and shipped according to the agreed schedule. By combining controlled manufacturing, detailed inspection, appropriate packaging, and responsive order coordination, Jai Hind Metal aims to provide a dependable supply experience for customers across different industries and markets.
Precisely manufactured metal products meeting demanding industrial standards.
Consistent quality, reliable performance, and strict inspection at every stage.
Available in customized sizes, grades, thicknesses, and specifications.
Efficient processing, secure packaging, and dependable delivery worldwide.
Duplex Steel S31803 Flanges are manufactured from a duplex stainless steel alloy containing chromium, nickel, molybdenum, and nitrogen, offering a balanced combination of mechanical strength and corrosion resistance for demanding service conditions. These flanges are particularly suitable for piping applications exposed to chlorides, seawater, moisture, and other corrosive media and can be supplied in different types, sizes, pressure classes, dimensions, and facing configurations according to specific system requirements. The duplex austenitic-ferritic structure of S31803 provides good resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking, while its higher strength allows the material to perform reliably under demanding pressure and mechanical loads. Molybdenum and nitrogen further contribute to localized corrosion resistance, making the grade suitable for challenging industrial environments. With a useful combination of strength, toughness, corrosion resistance, and service durability, Duplex Steel S31803 Flanges are commonly used in oil and gas, chemical processing, petrochemical, marine, desalination, power generation, and other industrial piping applications.
In the annealed condition, Duplex Steel S31803 Flanges provide a strong combination of corrosion resistance and mechanical strength, making them suitable for piping systems operating in challenging industrial environments. They are commonly used in oil and gas facilities, chemical processing plants, petrochemical units, marine installations, desalination plants, water treatment systems, and process piping where resistance to chloride-containing and corrosive media is important. The chromium, molybdenum, nitrogen, and nickel present in S31803 contribute to its resistance against pitting, crevice corrosion, and chloride-induced stress corrosion cracking, while the duplex microstructure provides higher mechanical strength compared with many conventional austenitic stainless steel grades. The material also offers good toughness and durability when manufactured and heat treated according to applicable requirements. With its combination of strength, corrosion resistance, and dependable service performance, Duplex Steel S31803 Flanges are well suited for demanding connections between pipes, valves, pumps, vessels, and other industrial equipment.
Duplex Steel S31803 Flanges are manufactured from an iron-based duplex stainless steel alloy containing chromium, nickel, molybdenum, and nitrogen, with a two-phase austenitic-ferritic microstructure. Chromium provides resistance to general corrosion and oxidation, while molybdenum and nitrogen improve the material’s resistance to localized corrosion such as pitting and crevice corrosion. Nickel helps maintain the austenitic phase and contributes to toughness, while the ferritic-austenitic structure provides higher mechanical strength than many conventional austenitic stainless steel grades. This combination of alloying elements gives S31803 a useful balance of strength and corrosion resistance, making Duplex Steel S31803 Flanges suitable for demanding applications involving chloride-containing environments, seawater, and other corrosive industrial media.
| A182 S31803 Flange Size Chart | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
|---|---|
| Duplex steel S31803 Flange Standards | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, GOST Flange, ASME/ANSI B16.5/16.36/16.47A/16.47B, MSS S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| Duplex S31803 Flange Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
| ASTM A182 S31803 Duplex Flanges Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
| ASME SA 182 S31803 Flange | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K |
| ASME SA182 S31803 Duplex steel Flange UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
| A182 S31803 Flange EN | 6Bar 10Bar 16Bar 25Bar 40Bar |
| Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized |
| Most common types of ASTM A182 S31803 Duplex Flange | Forged / Threaded / Screwed / Plate |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| ASME SA182M Duplex S31803 Flange Production technique | Forged, Heat treated and machined |
| A182 S31803 Flange Connect Type/ Flange Face Type | Raised Face (RF), Ring Type Joint (RTJ), Flat Face (FF), Large Male-Female (LMF), Lap-Joint Face (LJF), Small Male-Female (SMF), Small Tongue, Large Tongue & Groove, Groove |
| Special design | As per your drawing AS, ANSI, BS, DIN and JIS |
| ASME A182 Duplex S31803 Flange Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| ASTM A182 Ferritic Stainless Steel S31803 Flange Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
| Duplex S31803 Flange Origin | Indian / West Europe / Japan / USA / Korean |
| Manufacturer of Duplex steel ASTM A182 S31803 Flange | ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc. B.S: BS4504 , BS3293, BS1560, BS10 The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276 |
| ASME SA182M Duplex S31803 Flange Uses & application | Bitumen upgraders. Heavy oil refineries. Nuclear power (mostly seamless). Petrochemicals and acids. |
| Duplex S31803 EN 1092-1 Flange Export to | Ireland, Singapore, Indonesia, Ukraine, Saudi & Arabia, Spain, Canada, USA, Brazil, Thailand, Korea, Iran, India, Egypt, Oman, Dubai, Peru, etc |
| Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 | |
| ASME/ANSI B 16.5 | Blind Flange, High Hub Blind Flange, Slip on Flange, Welding Neck Flange, Socket Weld Flange, Ring Type Joint Flange, Lap Joint Flange, Threaded Flange |
| PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
| ASME/ANSI B 16.47 | Blind Flange [Series A & B],Welding Neck Flange |
| PRESSURE CLASS | 75, 150, 300, 400, 600, 900 |
| ASME/ANSI B 16.36 | Slip on Flange, Threaded Flange, Welding Neck Flange, |
| PRESSURE CLASS | 300, 400, 600, 900, 1500, 2500 |
| BS 4504 SEC 3.1 | Plate Flange, Loose Plate Flange, Loose Plate With Weld Neck Flange, Blank Flange, Welding Neck Flange, Hubbed Slip on Flange, Hubbed Threaded Flange, Lapped Pipe End Flange, |
| PRESSURE CLASS | PN 2.5 TO PN 40 |
| BS 4504[PART 1] | Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange, Welding Neck Flange, Hubbed Slip-On Hubbed Threaded, |
| PRESSURE CLASS | PN 2.5 TO PN 400 |
| BS 1560 BOSS | Plate Flange, Loose Plate With Weld On Plate Collar, Blank Flange, Welding Neck Flange, Hubbed Slip-On Hubbed Threaded, |
| PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
| BS10 | Welding Neck Flange, Plate Slip-On Flange, Screwed Boss Flange, Slip-On Boss Flange, Blind Flange |
| TABLE | D, E, F, H |
| DIN FLANGES | DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673 |
| PRESSURE CLASS | PN 6 TO PN 100 |
| Products | Size | |
| ASTM A182 Duplex S31803 Slip-On Flanges | ASTM A182 Duplex S31803 Threaded Flanges | Sizes 1/8″ – 36″ Raised Face or Flat Face |
| ASTM A182 Duplex S31803 Weld Neck Flanges | ASTM A182 Duplex S31803 Socket Weld Flanges | |
| ASTM A182 Duplex S31803 Blind Flanges | ASTM A182 Duplex S31803 Reducing Flanges | |
| ASTM A182 Duplex S31803 Lap Joint Flanges | ASTM A182 Duplex S31803 Plate Flanges | |
| ASTM A182 Duplex S31803 Orifice Flanges | ASTM A182 Duplex S31803 Forged Flanges | |
| ASTM A182 Duplex S31803 Ring Type Joint Flanges | ASTM A182 Duplex S31803 Square Flanges | |
| STANDARD | WERKSTOFF NR. | UNS |
| Duplex S31803 | 1.4462 | S31803 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| Duplex S31803 | 0.030 max | 2 max | 1 max | 0.030 max | 0.020 max | 22 – 23 | 3 – 3.50 | 4.50 – 6.50 | 0.14 – 0.20 | Bal |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 116000 , MPa – 800 | Psi – 80000 , MPa – 550 | 15 % |
| American Steel Flanges Standard | |
| Standard Code | Standard Name |
| ANSI ASME SA-182 | Forged Flanges |
| ANSI ASME B16.5 | Slip on flange, Welding neck flange, Blind flange, Threaded flange, Lap joint flange, RTJ flange |
| ASME – B 16.47 | Welding neck flange, Blind flange |
| ASME – B 16.36 | Welding neck flange Slip on flange |
| German Steel Flanges Standard | |
| DIN 2527 | Steel Blind Flanges, BLRF |
| DIN 2573 / 2576 | Flat Flange for Welding (Slip On) |
| DIN 2673 | Loose Flanges and Rings for Welding (Slip On Flanges and Plain Collars) |
| DIN 2641 / 2642 | Lapped / Loose (Lap Joint) Flanges Plain Collars |
| DIN 28115 | Long Neck Welding Flanges |
| DIN PN10, PN16 | Duplex S31803 PN10 Flanges, S31803 Duplex DIN PN 10 Flanges, S31803 Duplex PN16 Flange |
| DIN PN20, PN25 | Duplex S31803 PN20 Flanges, S31803 Duplex steel DIN PN 25 Flanges |
| DIN PN40, PN50 | Duplex S31803 PN40 Flanges, S31803 Duplex DIN PN 50 Flanges |
| Japanese Steel Flanges Standard | |
| JIS S31803220 | Slipon plate flange (SOP), Slipon Hub (SOH), Socket Welding flange (SW), Welding neck flange (WN), Lapjoint (LJ), Threaded flange (TR)/ Itegral flange (IT) Blank flange (BL) |
| JIS B2291 | Slipon plate flange (SOP), Slipon Hub (SOH), Socket Welding flange (SW), Welding neck flange (WN), Lapjoint (LJ), Threaded flange (TR)/ Itegral flange (IT) Blank flange (BL) |
| JIS 5K, 10K | Duplex S31803 5K SORF Flanges, S31803 Duplex 10K SOFF Flanges |
| JIS 16K, 20K | Duplex S31803 16K Blind Flanges, S31803 Duplex 20K BLRF Flanges |
| JIS 30K, 40K | Duplex S31803 30K Slip on Flanges, S31803 Duplex 40K Blind Flanges |
| Italian Flanges Standard | |
| UNI FLANGES | Plan flanges (2276, 2277, 2278, 6083, 6084) Welding neck (2280, 2281, 2282, 2283, 2284, 2285, 2286) Lapped flanges (6088, 6089, 6090, 2999, 2300) Blind flanges (6091, 6092, 6093, 6094, 6095, 6096, 6097) threaded flanges (2253, 2254) |
| British Standard Pipe Flanges Standard | |
| BS 10 Table D | Duplex S31803 BS 10 Table D Flanges, S31803 Table D Pipe Flange |
| BS 10 Table E | Duplex S31803 BS 10 Table E Flanges, S31803 Table E Pipe Flange |
| BS 10 Table F | Ferritic Stainless Steel S31803 BS 10 Table E Flanges, S31803 Duplex steel Table E Flanges |
| BS 10 Table H | Duplex S31803 BS 10 Table E Flanges, Duplex steel S31803 Table E Pipe Flanges |
| Flange Schedule/Class | Pipe Size – Pipe Flanges | Flange Connection Type | Flange Material | Max. Pressure |
|---|---|---|---|---|
| ASME B16.5 Class 150 | 1/2″ | FNPT | Duplex S31803 Flanges | 150 psi |
| ASME B16.5 Class 150 | 1/2″ | Socket Weld | Duplex steel S31803 Flanges | 275 psi |
| ASME B16.5 Class 150 | 1/2″ | Welded | Duplex S31803 Flanges | 150 psi |
| ASME B16.5 Class 150 | 3/4″ | FNPT | Duplex steel S31803 Flanges | 150 psi |
| ASME B16.5 Class 150 | 3/4″ | Socket Weld | Duplex S31803 Flanges | 275 psi |
| ASME B16.5 Class 150 | 1-1/4″ | Socket Weld | Duplex steel S31803 Flanges | 275 psi |
| ASME B16.5 Class 150 | 1-1/2″ | Socket Weld | Duplex S31803 Flanges | 275 psi |
| ASME B16.5 Class 150 | 2″ | FNPT | Duplex steel S31803 Flanges | 150 psi |
| ASME B16.5 Class 150 | 2″ | Socket Weld | Duplex S31803 Flanges | 275 psi |
| ASME B16.5 Class 150 | 2-1/2″ | Socket Weld | Duplex steel 2205 Flanges | 275 psi |
| ASME B16.5 Class 150 | 3″ | Socket Weld | Duplex S31803 Flanges | 275 psi |
| ASME B16.5 Class 150 | 4″ | FNPT | Duplex steel S31803 Flanges | 150 psi |
| ASME B16.5 Class 150 | 4″ | Socket Weld | Duplex S31803 Flanges | 275 psi |
| ASME B16.5 Class 300 | 1/2″ | Slip On | Duplex steel S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 1/2″ | Slip On | Duplex S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 1″ | Slip On | Duplex steel S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 1″ | Slip On | Duplex S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 1-1/4″ | FNPT | Duplex steel S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 1-1/4″ | Slip On | Duplex S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 1-1/2″ | Slip On | Duplex steel S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 1-1/2″ | Slip On | Duplex S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 2″ | Slip On | Duplex steel S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 2″ | Slip On | Duplex S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 2-1/2″ | Slip On | Duplex steel S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 2-1/2″ | Slip On | Duplex S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 3″ | Slip On | Duplex steel S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 3″ | Slip On | Duplex S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 4″ | Slip On | Duplex steel S31803 Flanges | 720 psi |
| ASME B16.5 Class 300 | 4″ | Slip On | Duplex S31803 Flanges | 720 psi |
| S31803 Duplex Blind Flange | Duplex S31803 Flat Flange Supplier in India |
| Duplex steel UNS S31803 Flanges Manufacturer | Duplex S31803 Slip on Flanges |
| Duplex steel S31803 Weld Neck Flanges | Duplex S31803 Socket weld Flanges Dealer in India |
| Duplex S31803 Long Weld Neck Flanges Stockist | ASTM A182 S31803 Duplex Threaded Flanges |
| Duplex steel 2205 Flanges Supplier in India | Duplex EN 1092-1 Plate Flanges |
| Duplex steel S31803 Forged Flanges Wholesaler | Duplex steel UNS S31803 Lap Joint Flanges Supplier |
| Duplex S31803 BLRF Flange Manufacturer | Duplex steel S31803 Raised Face Flanges |
| S31803 Duplex Nipoflange | Duplex steel Duplex S31803 Reducing Flanges |
| ANSI B16.5 Duplex S31803 Pipe Flange | Duplex S31803 Ring Type Joint Flanges |
| 1.4462 Duplex steel Orifice Flange | Duplex S31803 Spectacle Blind Flanges Stockists |
| Duplex steel S31803 PN 10 Flange | S31803 PN 16 Duplex Flanges Stockists |
| Duplex steel S31803 DIN Flanges | Duplex Steel 1.4462 Duplex SORF Flanges Exporter |
| ASME B16.5 Duplex S31803 Flanges | ASTM A182 S31803 Tongue & Groove Flanges |
| Duplex S31803 Male & Female Flanges | Duplex steel S31803 RTJF Flanges |
| ASTM A182 Duplex S31803 Screwed Flanges | ASME SA182 S31803 Expander Flanges |
| S31803 Duplex Spades Ring Spacers Flanges | ASME SA182 Duplex S31803 Flat Face Flange |
| S31803 Duplex 5K SOFF Flanges | Duplex steel S31803 10K Flanges |
| Duplex Steel 1.4462 Puddle Flanges Exporter | Duplex S31803 Socket Welding Flange |
| S31803 Duplex steel Weldo Flanges | S31803 Duplex Nipo Flanges |
| Duplex S31803 Long Weld Neck Flanges | ASTM A182 S31803 Flanges Facing Type & Finish |
| BS Standard Table E Flange | British Standard Table D Pipe Flanges |
| S31803 Long Welding Neck Flange | S31803 Duplex Raised Face Flange |
| ASME SA182 Duplex steel 30 Spectacle Blind Flanges | S31803 Duplex BLRF Flanges Supplier |
| Duplex steel 30 High Hub Blinds Flanges | S31803 Flanges Facing Type & Finish |
| S31803 Duplex Forging Facing Flanges Dealer | Duplex S31803 Weld Neck Flanges A / B Stockist |
| Duplex steel S31803 Plate Flange Supplier in Mumbai | Duplex steel S31803 Loose Flanges Manufacturer in India |
| Duplex 1.4462 Flanges Dimensions | Duplex steel S31803 Spades Ring Spacers Flanges |
| Wrought Duplex S31803 Flanges | ASTM A182 S31803 Expander Flanges at Best Price |
| Duplex S31803 Reducing Flanges Supplier | Suppliers of S31803 Duplex steel Welding Neck Flange |
Duplex Steel S31803 Flanges are available in forged, plate, and other suitable construction forms, depending on the flange type, size, application, and customer requirements. Forged flanges are commonly manufactured in accordance with ASTM A182 material specifications, while standard dimensions are generally followed as per ASME B16.5 for pipe flanges and flanged fittings. For larger diameter requirements, applicable dimensions may be supplied according to ASME B16.47. Manufacturing and dimensional requirements are carefully followed to provide consistent material quality, accurate fitment, and dependable performance when the flanges are installed in industrial piping and equipment systems.






We supply Duplex Steel S31803 Flanges according to widely recognized international standards, including DIN, ISO, JIS, and ANSI, to support different industrial piping and equipment requirements. Our flanges can be supplied in various sizes, dimensions, pressure ratings, facing types, and configurations depending on the application and customer specifications. At Jai Hind Metal, we focus on maintaining consistent material quality, accurate dimensions, proper workmanship, and reliable product performance throughout the manufacturing and supply process. Duplex Steel S31803 Flanges can also be supplied to meet specific drawings, project specifications, inspection requirements, and applicable industry standards. For product details, technical specifications, or customized requirements, email us at info@jaihindmetal.com.
Here’s a unique and naturally written version for Duplex Steel S31803 Flanges, while retaining the same technical and commercial intent:
Duplex Steel S31803 Flanges are used to create secure and reliable connections between pipes, valves, pumps, pressure vessels, and other equipment in industrial piping systems. Their combination of high mechanical strength and resistance to corrosion makes them suitable for service conditions involving chlorides, seawater, moisture, and other aggressive media. These flanges are commonly used in oil and gas, chemical processing, petrochemical, marine, desalination, water treatment, power generation, pulp and paper, and offshore industries, where dependable connections and long-term material performance are important. Their resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking makes S31803 a suitable choice for piping and equipment connections exposed to demanding operating environments.
Looking for high-quality industrial products manufactured to your specific requirements? Contact our team for product details, customized solutions, pricing, and timely delivery.
Email: info@jaihindmetal.com
Our high-performance metal products are engineered to meet the demanding requirements of industries operating in challenging environments, including extreme temperatures, pressure and corrosive conditions.
Our corrosion-resistant metal products are widely used in marine environments where exposure to seawater, salt spray and harsh atmospheric conditions demands exceptional durability and reliability.
Our nickel alloys and high-performance metal products are used throughout the oil and gas industry for demanding applications involving high pressure, corrosive fluids, sour gas and extreme operating conditions.
Our corrosion-resistant alloys provide dependable performance in chemical processing equipment exposed to aggressive chemicals, high temperatures and challenging process conditions.
High-strength nickel alloys and specialty metals are selected for aerospace applications where lightweight performance, strength and resistance to extreme temperatures are essential.
Our specialty metal products support power generation equipment operating under high temperatures, pressure and corrosive conditions, delivering reliable long-term performance.
Corrosion-resistant metals are ideal for salt production environments where continuous exposure to concentrated salt and moisture can severely affect conventional materials.
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