Duplex Steel S31803 Flanges Manufacturer in Mumbai, India

Largest Duplex Steel S31803 Flanges Manufacturer & Supplier in Mumbai, India

Jai Hind Metal is a reliable manufacturer and supplier of Duplex Steel S31803 Flanges, providing high-strength piping components for applications where corrosion resistance, mechanical performance, and dependable service are important. We understand that every piping system can have different requirements depending on flange size, dimensions, pressure class, facing, material specifications, and applicable manufacturing standards. Our Duplex S31803 Flanges are produced according to customer requirements, with careful attention to dimensional accuracy, surface condition, material quality, and workmanship throughout the manufacturing process. Each finished flange undergoes appropriate inspection before dispatch, including checks for dimensions, surface finish, appearance, and overall manufacturing quality. Our quality control team monitors production and final inspection stages to maintain consistent results, while third-party inspection can be arranged when additional verification is required for specific projects. With organized inventory and suitable storage facilities, we can support both regular orders and larger project requirements.

We also understand that proper handling and packaging play an important role in maintaining the condition of finished Duplex Steel S31803 Flanges during storage and transportation. Products are securely packed using suitable protective materials to help minimize the risk of scratches, moisture, contamination, and physical damage during loading or transit. Where required, customized packaging, product identification, labeling, markings, and additional protective measures can be arranged according to customer instructions or project specifications. Our team coordinates with established logistics providers to manage dispatch efficiently and help ensure that orders reach their destination safely and within the agreed delivery schedule. By combining controlled manufacturing, careful inspection, secure packaging, and clear communication, Jai Hind Metal aims to provide a smooth supply experience and dependable support to customers across different industries and markets.

Precision Engineering

Precisely manufactured metal products meeting demanding industrial standards.

Quality Assured

Consistent quality, reliable performance, and strict inspection at every stage.

Custom Dimensions

Available in customized sizes, grades, thicknesses, and specifications.

Reliable Supply

Efficient processing, secure packaging, and dependable delivery worldwide.

Duplex Steel S31803 Flanges are crafted from a unique duplex stainless steel alloy that includes chromium, nickel, molybdenum, nitrogen, and iron. This blend creates a balanced austenitic-ferritic microstructure, giving these flanges an impressive mix of strength and resistance to corrosion. They’re perfect for piping systems that face harsh conditions like chlorides, seawater, moisture, and other aggressive process media. Plus, they come in a variety of types, sizes, pressure classes, dimensions, and facing configurations to fit your specific needs. The chromium and molybdenum work together to fend off general, pitting, and crevice corrosion, while nitrogen boosts localized corrosion resistance and enhances mechanical strength. Thanks to their duplex structure, these flanges also resist chloride-induced stress corrosion cracking and can handle tough mechanical loads with ease. With their remarkable combination of high strength, corrosion resistance, toughness, and durability, Duplex Steel S31803 Flanges are a go-to choice in industries like oil and gas, chemical processing, petrochemical, marine, desalination, power generation, water treatment, pulp and paper, and offshore operations, where reliable performance is a must in challenging environments.

ASTM A182 S31803 Flange, Duplex Steel 2205 Flanges, Duplex steel S31803 Flanges, ANSI B16.5 Duplex S31803 Flanges, UNS S31803 Flanges, Ferritic Stainless Steel S31803 Plate Flanges, Duplex S31803 Flange, Duplex steel S31803 Pipe Flanges, 1.4462 Flanges, Duplex Steel 2205 Forged Flanges, UNS S31803 Flange, Duplex S31803 Flanges Manufacturer in Mumbai, India.

When it comes to the annealed condition, Duplex Steel S31803 Flanges really shine with their impressive mix of corrosion resistance and mechanical strength. This makes them a go-to choice for tough industrial settings where durability and structural integrity are key. You’ll find them commonly used in oil and gas facilities, chemical processing plants, petrochemical equipment, offshore installations, marine systems, desalination units, water treatment plants, and in process piping that faces corrosive environments. The unique blend of chromium, molybdenum, and nitrogen in S31803 enhances its ability to resist pitting and crevice corrosion, especially in environments rich in chlorides. Plus, the duplex austenitic-ferritic structure offers solid protection against stress corrosion cracking caused by chlorides. With its higher strength, this material can handle demanding pressure and mechanical loads with ease. Overall, Duplex Steel S31803 Flanges provide a well-rounded combination of corrosion resistance, toughness, strength, and long-lasting service, making them perfect for critical connections between pipes, valves, pumps, vessels, and other industrial equipment.

Table of Contents

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Composition of Duplex Steel S31803 Flanges

Duplex Steel S31803 Flanges are crafted from a specialized iron-based duplex stainless steel alloy that includes chromium, nickel, molybdenum, nitrogen, and carefully measured amounts of other alloying elements. This unique austenitic-ferritic microstructure strikes a perfect balance between impressive mechanical strength and excellent corrosion resistance. Chromium lays the groundwork for general corrosion resistance, while molybdenum and nitrogen step in to boost protection against pitting and crevice corrosion, especially in environments rich in chlorides. Nickel plays a key role in stabilizing the austenitic phase, enhancing toughness and overall performance of the material. The addition of nitrogen not only bolsters strength but also helps fend off localized corrosion. Thanks to this meticulously balanced composition, S31803 Flanges are tough enough to handle challenging service conditions involving seawater, chlorides, moisture, and corrosive process media. This makes them a great fit for a variety of applications, including oil and gas, chemical processing, petrochemical, marine, desalination, offshore, power generation, and water treatment.

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Duplex S31803 Flanges Specification

A182 S31803 Flange Size Chart1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Duplex steel S31803 Flange StandardsANSI/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 ANSIClass 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
ASTM A182 S31803 Duplex Flanges Pressure Calculation in DIN6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
ASME SA 182 S31803 Flange5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
ASME SA182 S31803 Duplex steel Flange UNI6Bar 10Bar 16Bar 25Bar 40Bar
A182 S31803 Flange EN6Bar 10Bar 16Bar 25Bar 40Bar
CoatingOil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized
Most common types of ASTM A182 S31803 Duplex FlangeForged / Threaded / Screwed / Plate
Test CertificatesEN 10204/3.1B
Raw Materials Certificate
100% Radiography Test Report
Third Party Inspection Report, etc
ASME SA182M Duplex S31803 Flange Production techniqueForged, Heat treated and machined
A182 S31803 Flange Connect Type/ Flange Face TypeRaised 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
15 NB (1/2″) to 200 NB (8″)
Equal and Reducing Configurations

ASME A182 Duplex S31803 Flange TestDirect-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
ASTM A182 Ferritic Stainless Steel S31803 Flange EquipmentPress machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
Duplex S31803 Flange OriginIndian / 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.
ASTM A182 S31803 Flange: -BS Flange, EN Flange, API 6A Flange, ANSI Flange, ASME Flange, DIN Flange, EN1092-1 Flange, UNI Flange, JIS/ KS Flange, BS4504 Flange, GB Flange, AWWA C207 Flange, GOST Flange, PSI Flange

B.S: BS4504 , BS3293, BS1560, BS10
AS 2129: Table D; Table E; Table H
ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
ANSI : ANSI B16.5, ANSI B16.47(API605), MSS SP44, ANSI B16.36, ANSI B16.48
ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
American standard (ANSI)
German (DIN)
British standard (BS)

DIN: DIN 2527, DIN 2566, DIN 2573, DIN 2576, DIN 2641, DIN 2642, DIN 2655, DIN 2656, DIN 2627, DIN 2628, DIN 2629, DIN 2631, DIN 2632, DIN 2633, DIN 2634, DIN 2635, DIN 2636, DIN 2637, DIN 2638 ASTM A182 S31803 Duplex Flanges
The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
ASME SA182M Duplex S31803 Flange Uses & applicationBitumen upgraders.
Heavy oil refineries.
Nuclear power (mostly seamless).
Petrochemicals and acids.
Duplex S31803 EN 1092-1 Flange Export toIreland, 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

Duplex steel S31803 Flanges can be supplied in either Pipe or Plate construction and are covered by specification ASTM A182 and ASME B16.5.

ASME/ANSI B 16.5Blind Flange, High Hub Blind Flange, Slip on Flange, Welding Neck Flange, Socket Weld Flange, Ring Type Joint Flange, Lap Joint Flange, Threaded Flange
PRESSURE CLASS150, 300, 400, 600, 900, 1500, 2500
ASME/ANSI B 16.47Blind Flange [Series A & B],Welding Neck Flange
PRESSURE CLASS75, 150, 300, 400, 600, 900
ASME/ANSI B 16.36Slip on Flange, Threaded Flange, Welding Neck Flange,
PRESSURE CLASS300, 400, 600, 900, 1500, 2500
BS 4504 SEC 3.1Plate 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 CLASSPN 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 CLASSPN 2.5 TO PN 400
BS 1560 BOSSPlate Flange, Loose Plate With Weld On Plate Collar, Blank Flange, Welding Neck Flange, Hubbed Slip-On Hubbed Threaded,
PRESSURE CLASS150, 300, 400, 600, 900, 1500, 2500
BS10Welding Neck Flange, Plate Slip-On Flange, Screwed Boss Flange, Slip-On Boss Flange, Blind Flange
TABLED, E, F, H
DIN FLANGESDIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673
PRESSURE CLASSPN 6 TO PN 100

ANSI B16.5 Duplex steel S31803 Flange Forms & Availability

ProductsSize
ASTM A182 Duplex S31803 Slip-On FlangesASTM A182 Duplex S31803 Threaded FlangesSizes 1/8″ – 36″
Raised Face or Flat Face
ASTM A182 Duplex S31803 Weld Neck FlangesASTM A182 Duplex S31803 Socket Weld Flanges
ASTM A182 Duplex S31803 Blind FlangesASTM A182 Duplex S31803 Reducing Flanges
ASTM A182 Duplex S31803 Lap Joint FlangesASTM A182 Duplex S31803 Plate Flanges
ASTM A182 Duplex S31803 Orifice FlangesASTM A182 Duplex S31803 Forged Flanges
ASTM A182 Duplex S31803 Ring Type Joint FlangesASTM A182 Duplex S31803 Square Flanges

 

Duplex S31803 Forged Flanges, S31803 Duplex steel Plate Flanges Dealer, Duplex Steel 2205 SORF Flanges, ANSI B16.5 S31803 Duplex Blind Flanges, ASME SA182 S31803 RTJ Flanges, Duplex Steel 1.4462 Lap Joint Flanges Wholesaler, Buy Duplex steel UNS S31803 Threaded Flanges, Ferritic Stainless Steel S31803 Long Weld Neck Flanges, S31803 Duplex Flanges Stockist, Duplex S31803 Orifice Flange, S31803 Duplex Spectacle Blind Flanges Supplier in Mumbai, India.

Equivalent Grades Duplex S31803 Flanges

STANDARDWERKSTOFF NR.UNS
Duplex S318031.4462S31803

Chemical Composition of Duplex steel S31803 Plate Flanges

GradeCMnSiPSCrMoNiNFe
Duplex S318030.030 max2 max1 max0.030 max0.020 max22 – 233 – 3.504.50 – 6.500.14 – 0.20Bal

Mechanical Properties of Duplex A182 S31803 Forged Flanges

DensityMelting PointTensile StrengthYield Strength (0.2%Offset)Elongation
7.95 g/cm31350 °C (2460 °F)Psi – 71000 , MPa – 490Psi – 32000 , MPa – 22035 %

 

Duplex Steel S31803 can be supplied in either Pipe or Plate construction and are covered by specification ASTM A182 and ASME B16.5.

Duplex Steel S31803 Flanges are available in forged and plate construction, depending on the flange design, size, pressure rating, and specific application requirements. These flanges are manufactured in accordance with recognized material and dimensional standards to provide consistent quality, accurate fitment, and reliable performance in industrial piping systems. Forged Duplex S31803 Flanges are generally supplied in accordance with ASTM A182 / ASME SA182 material requirements, while standard flange dimensions are commonly manufactured according to ASME B16.5. For larger-diameter piping systems, dimensions may be supplied in accordance with ASME B16.47, where applicable. Following these established standards helps maintain dimensional consistency, material traceability, pressure compatibility, and reliable connections with pipes, valves, pumps, and other associated equipment.

Duplex Steel S31803 Flanges Production Range

Stainless Steel 304 Weld Neck Flanges

Stainless Steel 304 Slip on Flanges

Stainless Steel 304 Blind Flanges

Stainless Steel 304 Socket weld Flanges

Stainless Steel 304 Threaded Flanges

Stainless Steel 304 Lap Joint Flanges

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We offer These Duplex Steel S31803 Flanges as per DIN, ISO, JIS or ANSI Standard.

We supply Duplex Steel S31803 Flanges in accordance with recognized international standards such as DIN, ISO, JIS, and ANSI, supporting the requirements of industrial piping systems, process equipment, and engineering projects. Our flanges are available in different sizes, dimensions, pressure classes, facing types, and configurations to suit specific installation and operating conditions. At Jai Hind Metal, we focus on maintaining consistent material quality, dimensional accuracy, surface finish, and dependable workmanship while supplying S31803 Flanges according to applicable standards and customer specifications. Where required, project-specific drawings, inspection requirements, product identification, markings, and customized manufacturing details can also be accommodated. For product details, technical specifications, or customized requirements, email us at info@jaihindmetal.com.

Duplex Steel S31803 Flanges are widely used to form secure and reliable connections between pipes, valves, pumps, pressure vessels, heat exchangers, and other equipment in industrial piping systems. Their combination of high mechanical strength and resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking makes them suitable for challenging service environments. These flanges are commonly used in oil and gas facilities, chemical processing, petrochemical plants, offshore platforms, marine systems, desalination plants, water treatment facilities, power generation, pulp and paper production, and process industries, particularly where piping components are exposed to seawater, chlorides, moisture, and other corrosive media. The balanced performance of S31803 provides a practical combination of strength, corrosion resistance, toughness, and durability for demanding piping and equipment connections.

Uses & Applications of Duplex Steel S31803 Flanges

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INDUSTRIES WE SERVE

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.

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Marine Applications

Marine Applications

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.

Oil and Gas Industry

Oil & Gas

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.

Chemical Processing

Chemical Processing

Our corrosion-resistant alloys provide dependable performance in chemical processing equipment exposed to aggressive chemicals, high temperatures and challenging process conditions.

Aerospace Industry

Aerospace

High-strength nickel alloys and specialty metals are selected for aerospace applications where lightweight performance, strength and resistance to extreme temperatures are essential.

Power Generation

Power Generation

Our specialty metal products support power generation equipment operating under high temperatures, pressure and corrosive conditions, delivering reliable long-term performance.

Salt Production

Salt Production

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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