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Jai Hind Metal is a trusted manufacturer and supplier of Duplex Steel Flanges, providing dependable piping components for applications where strength, corrosion resistance, and long-term performance are essential. We understand that flange requirements can vary from one project to another, including specifications such as size, thickness, pressure rating, flange facing, dimensions, material grade, and applicable manufacturing standards. Our Duplex Steel Flanges are manufactured according to the customer’s specifications, with close attention to dimensional accuracy, surface quality, and overall workmanship. During production, appropriate quality checks are carried out to maintain consistency, while finished flanges are inspected for dimensions, appearance, surface finish, and manufacturing quality before dispatch. Third-party inspection can also be coordinated when required for specific projects or quality documentation. With planned inventory management and suitable storage arrangements, we are able to handle both routine requirements and bulk orders for industrial projects.
Along with manufacturing, we pay attention to the safe handling and packaging of every Duplex Steel Flange supplied to our customers. Finished flanges are properly protected using suitable packing materials to minimize the risk of scratches, moisture exposure, contamination, and handling damage during transportation. Depending on the nature of the order, we can also provide customized packaging, product identification, marking, and additional protective measures to meet specific shipping requirements. Our dispatch team works with reliable logistics partners to coordinate transportation and help ensure that orders are delivered safely and according to the agreed schedule. Through controlled manufacturing, systematic inspection, secure packaging, and responsive coordination, Jai Hind Metal aims to provide a smooth supply experience and consistent support to customers across different industries and markets.
If you want, I can also create 2–3 more unique versions for Duplex Steel Flanges with different wording and structure so you can use them on multiple pages without repetitive content.
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 Flanges are manufactured from a duplex stainless steel structure that combines the useful properties of austenitic and ferritic stainless steels, offering a practical balance of strength and corrosion resistance. These flanges are well suited for piping systems exposed to chloride-containing environments, moisture, seawater, and other demanding service conditions where reliable material performance is required. They are available in different flange types, sizes, pressure ratings, dimensions, and facing configurations to suit various piping and equipment requirements. The duplex structure provides higher mechanical strength than many conventional austenitic stainless steels while also offering good resistance to pitting, crevice corrosion, and stress corrosion cracking. Their combination of strength, toughness, and corrosion resistance makes Duplex Steel Flanges suitable for applications where both durability and material reliability are important. Depending on the grade and application, these flanges are commonly used in chemical processing, oil and gas, petrochemical, marine, desalination, power generation, and other industrial piping systems where demanding operating conditions are encountered.
In the annealed condition, Duplex Steel Flanges provide a strong combination of corrosion resistance and mechanical strength, making them suitable for piping systems exposed to demanding operating environments. They are commonly used in oil and gas facilities, chemical processing plants, petrochemical units, marine installations, desalination systems, power generation equipment, and process piping where dependable material performance is required. The balanced austenitic-ferritic structure of duplex stainless steel offers good resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking, while its higher strength supports demanding pressure and load conditions. Duplex grades can also provide good toughness and durability when properly manufactured and heat treated according to the applicable material requirements. With their combination of strength, corrosion resistance, and long-term service capability, Duplex Steel Flanges are well suited for industrial piping and equipment connections operating in harsh or chloride-containing environments.
Duplex Steel Flanges are manufactured from an iron-based stainless steel alloy with a balanced austenitic and ferritic microstructure, typically containing chromium, nickel, molybdenum, and controlled amounts of nitrogen. Chromium provides strong resistance to general corrosion and oxidation, while molybdenum and nitrogen help improve resistance to pitting and crevice corrosion, particularly in chloride-containing environments. Nickel supports the stability of the austenitic phase and contributes to toughness, while the duplex structure gives the material higher mechanical strength than many conventional austenitic stainless steels. This combination of alloying elements and dual-phase structure makes Duplex Steel Flanges suitable for demanding piping applications where strength, corrosion resistance, and reliable performance are required.
| A182 Flange Size Chart | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
|---|---|
| Duplex steel 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 Flange Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
| ASTM A182 Duplex Flanges Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
| ASME SA 182 Flange | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K |
| ASME SA182 Duplex steel Flange UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
| A182 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 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 Flange Production technique | Forged, Heat treated and machined |
| A182 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 Flange Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| ASTM A182 Ferritic Stainless Steel Flange Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
| Duplex Flange Origin | Indian / West Europe / Japan / USA / Korean |
| Manufacturer of Duplex steel ASTM A182 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 Flange Uses & application | Bitumen upgraders. Heavy oil refineries. Nuclear power (mostly seamless). Petrochemicals and acids. |
| Duplex 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 Slip-On Flanges | ASTM A182 Duplex Threaded Flanges | Sizes 1/8″ – 36″ Raised Face or Flat Face |
| ASTM A182 Duplex Weld Neck Flanges | ASTM A182 Duplex Socket Weld Flanges | |
| ASTM A182 Duplex Blind Flanges | ASTM A182 Duplex Reducing Flanges | |
| ASTM A182 Duplex Lap Joint Flanges | ASTM A182 Duplex Plate Flanges | |
| ASTM A182 Duplex Orifice Flanges | ASTM A182 Duplex Forged Flanges | |
| ASTM A182 Duplex Ring Type Joint Flanges | ASTM A182 Duplex Square Flanges | |
| 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 PN10 Flanges, Duplex DIN PN 10 Flanges, Duplex PN16 Flange |
| DIN PN20, PN25 | Duplex PN20 Flanges, Duplex steel DIN PN 25 Flanges |
| DIN PN40, PN50 | Duplex PN40 Flanges, Duplex DIN PN 50 Flanges |
| Japanese Steel Flanges Standard | |
| JIS S32205220 | 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 5K SORF Flanges, Duplex 10K SOFF Flanges |
| JIS 16K, 20K | Duplex 16K Blind Flanges, Duplex 20K BLRF Flanges |
| JIS 30K, 40K | Duplex 30K Slip on Flanges, 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 BS 10 Table D Flanges, Table D Pipe Flange |
| BS 10 Table E | Duplex BS 10 Table E Flanges, Table E Pipe Flange |
| BS 10 Table F | Ferritic Stainless Steel BS 10 Table E Flanges, Duplex steel Table E Flanges |
| BS 10 Table H | Duplex BS 10 Table E Flanges, Duplex steel 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 Flanges | 150 psi |
| ASME B16.5 Class 150 | 1/2″ | Socket Weld | Duplex steel Flanges | 275 psi |
| ASME B16.5 Class 150 | 1/2″ | Welded | Duplex Flanges | 150 psi |
| ASME B16.5 Class 150 | 3/4″ | FNPT | Duplex steel Flanges | 150 psi |
| ASME B16.5 Class 150 | 3/4″ | Socket Weld | Duplex Flanges | 275 psi |
| ASME B16.5 Class 150 | 1-1/4″ | Socket Weld | Duplex steel Flanges | 275 psi |
| ASME B16.5 Class 150 | 1-1/2″ | Socket Weld | Duplex Flanges | 275 psi |
| ASME B16.5 Class 150 | 2″ | FNPT | Duplex steel Flanges | 150 psi |
| ASME B16.5 Class 150 | 2″ | Socket Weld | Duplex 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 Flanges | 275 psi |
| ASME B16.5 Class 150 | 4″ | FNPT | Duplex steel Flanges | 150 psi |
| ASME B16.5 Class 150 | 4″ | Socket Weld | Duplex Flanges | 275 psi |
| ASME B16.5 Class 300 | 1/2″ | Slip On | Duplex steel Flanges | 720 psi |
| ASME B16.5 Class 300 | 1/2″ | Slip On | Duplex Flanges | 720 psi |
| ASME B16.5 Class 300 | 1″ | Slip On | Duplex steel Flanges | 720 psi |
| ASME B16.5 Class 300 | 1″ | Slip On | Duplex Flanges | 720 psi |
| ASME B16.5 Class 300 | 1-1/4″ | FNPT | Duplex steel Flanges | 720 psi |
| ASME B16.5 Class 300 | 1-1/4″ | Slip On | Duplex Flanges | 720 psi |
| ASME B16.5 Class 300 | 1-1/2″ | Slip On | Duplex steel Flanges | 720 psi |
| ASME B16.5 Class 300 | 1-1/2″ | Slip On | Duplex Flanges | 720 psi |
| ASME B16.5 Class 300 | 2″ | Slip On | Duplex steel Flanges | 720 psi |
| ASME B16.5 Class 300 | 2″ | Slip On | Duplex Flanges | 720 psi |
| ASME B16.5 Class 300 | 2-1/2″ | Slip On | Duplex steel Flanges | 720 psi |
| ASME B16.5 Class 300 | 2-1/2″ | Slip On | Duplex Flanges | 720 psi |
| ASME B16.5 Class 300 | 3″ | Slip On | Duplex steel Flanges | 720 psi |
| ASME B16.5 Class 300 | 3″ | Slip On | Duplex Flanges | 720 psi |
| ASME B16.5 Class 300 | 4″ | Slip On | Duplex steel Flanges | 720 psi |
| ASME B16.5 Class 300 | 4″ | Slip On | Duplex Flanges | 720 psi |
| Duplex Blind Flange | Duplex Flat Flange Supplier in India |
| Duplex steel Flanges Manufacturer | Duplex Slip on Flanges |
| Duplex steel Weld Neck Flanges | Duplex Socket weld Flanges Dealer in India |
| Duplex Long Weld Neck Flanges Stockist | ASTM A182 Duplex Threaded Flanges |
| Duplex steel 2205 Flanges Supplier in India | Duplex EN 1092-1 Plate Flanges |
| Duplex steel Forged Flanges Wholesaler | Duplex steel Lap Joint Flanges Supplier |
| Duplex BLRF Flange Manufacturer | Duplex steel Raised Face Flanges |
| Duplex Nipoflange | Duplex steel Duplex Reducing Flanges |
| ANSI B16.5 Duplex Pipe Flange | Duplex Ring Type Joint Flanges |
| Duplex steel Orifice Flange | Duplex Spectacle Blind Flanges Stockists |
| Duplex steel PN 10 Flange | PN 16 Duplex Flanges Stockists |
| Duplex steel DIN Flanges | Duplex Steel Duplex SORF Flanges Exporter |
| ASME B16.5 Duplex Flanges | ASTM A182 Tongue & Groove Flanges |
| Duplex Male & Female Flanges | Duplex steel RTJF Flanges |
| ASTM A182 Duplex Screwed Flanges | ASME SA182 Expander Flanges |
| Duplex Spades Ring Spacers Flanges | ASME SA182 Duplex Flat Face Flange |
| Duplex 5K SOFF Flanges | Duplex steel 10K Flanges |
| Duplex Steel Puddle Flanges Exporter | Duplex Socket Welding Flange |
| Duplex steel Weldo Flanges | Duplex Nipo Flanges |
| Duplex Long Weld Neck Flanges | ASTM A182 Flanges Facing Type & Finish |
| BS Standard Table E Flange | British Standard Table D Pipe Flanges |
| Long Welding Neck Flange | Duplex Raised Face Flange |
| ASME SA182 Duplex steel 30 Spectacle Blind Flanges | Duplex BLRF Flanges Supplier |
| Duplex steel 30 High Hub Blinds Flanges | Flanges Facing Type & Finish |
| Duplex Forging Facing Flanges Dealer | Duplex Weld Neck Flanges A / B Stockist |
| Duplex steel Plate Flange Supplier in Mumbai | Duplex steel Loose Flanges Manufacturer in India |
| Duplex Flanges Dimensions | Duplex steel Spades Ring Spacers Flanges |
| Wrought Duplex Flanges | ASTM A182 Expander Flanges at Best Price |
| Duplex Reducing Flanges Supplier | Suppliers of Duplex steel Welding Neck Flange |
| Manufacturers, Suppliers of Duplex Plate Flanges : | |||||
|---|---|---|---|---|---|
| Bengaluru | Mumbai | Chennai | Hyderabad | Kolkata | Pune |
| New Delhi | Ahmedabad | Jaipur | Surat | Salem | Gandhinagar |
| Bhiwandi | Tiruppur | Sivakasi | Jamnagar | Thiruvananthapuram | Rajahmundry |
| Bhubaneswar | Vijaywada | Firozabad | Bokaro Steel City | Rajkot | Bharuch |
| Panna | Raipur | Cochin | Ludhiana | Panipat | Durgapur |
| Peenya | Pimpri-Chinchwad | Channapatna | Kharagpur | Nashik | Bareilly |
| Varanasi | Haldia | Rourkela | Bangalore | Moradabad | Indore |
| Visakhapatnam | Trivandrum | Pithampur | Dibrugarh | Angul | Gwalior |
| Coimbatore | Kannur | Nagpur | Vadodara | Rudrapur | Noida |
| Agra | Bhagalpur | Jamshedpur | Bhilai | Lucknow | kanpur |
| Thane | Bhopal | Navi Mumbai | Vasai | Bikaner | Maharashtra |
Duplex Steel Flanges are available in forged, plate, or other suitable construction forms, depending on the flange type, size, grade, and application requirements. They are manufactured according to recognized material and dimensional standards to maintain consistency and proper fitment in industrial piping systems. Forged Duplex Steel Flanges are commonly supplied in accordance with ASTM A182, while dimensions and tolerances are generally produced as per applicable standards such as ASME B16.5 for standard pipe flanges and ASME B16.47 for larger-diameter flanges. These standards help ensure dependable material quality, dimensional accuracy, pressure compatibility, and interchangeability across a variety of piping and equipment connections.






We supply Duplex Steel Flanges in accordance with widely recognized international standards, including DIN, ISO, JIS, and ANSI, to support the requirements of different industrial piping and equipment systems. Our flanges can be supplied in a range of sizes, dimensions, pressure classes, facing options, and configurations based on the application and customer specifications. At Jai Hind Metal, we focus on maintaining dimensional consistency, material quality, proper workmanship, and reliable service performance throughout the manufacturing and supply process. Duplex Steel Flanges can also be produced or supplied to meet specific project requirements, drawings, and applicable standards. For product information, technical specifications, or customized requirements, email us at info@jaihindmetal.com.
Duplex Steel Flanges are widely 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 strong resistance to corrosion makes them suitable for applications exposed to moisture, chlorides, seawater, and other demanding service conditions. These flanges are commonly used in oil and gas facilities, chemical processing plants, petrochemical units, marine systems, desalination plants, water treatment, pulp and paper industries, power generation, offshore installations, and pollution control equipment, where reliable performance and resistance to corrosion are important for long-term operation.
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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