Duplex Steel F51 Flanges Manufacturer in Mumbai, India

Largest Duplex Steel F51 Flanges Manufacturer & Supplier in Mumbai, India

At Jai Hind Metal, we take pride in being a trusted manufacturer and supplier of Duplex Steel F51 Flanges. Our flanges are designed to withstand high strength and resist corrosion, making them ideal for industries that operate under tough conditions. We recognize that every project has unique flange requirements, influenced by factors like pipe size, dimensions, pressure class, facing type, material specifications, and relevant manufacturing standards. That’s why our Duplex F51 Flanges are tailored to meet your specific needs, with a strong focus on material quality, precise dimensions, surface finish, and overall craftsmanship throughout the production process. Each flange undergoes a meticulous inspection before it leaves our facility, ensuring it meets all standards for dimensions, surface quality, and overall appearance. Our dedicated quality control team conducts both in-process and final inspections to ensure consistency, and we can also arrange for third-party inspections if your project demands it. With our well-organized stock and adequate storage facilities, we’re ready to handle both regular orders and larger project demands. We also prioritize proper handling and packaging to keep our Duplex Steel F51 Flanges in top condition during storage, loading, and transport. Each product is securely packed with protective materials to prevent scratches, moisture exposure, contamination, and any damage during transit. Depending on your needs, we can customize packaging, product identification, labeling, and additional protective measures. Our team collaborates with reliable logistics partners to ensure that your orders are dispatched safely and delivered on time. By combining meticulous manufacturing, thorough inspections, careful packaging, and responsive communication, Jai Hind Metal is committed to providing you with a reliable supply experience.

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 F51 Flanges are manufactured from a duplex stainless steel alloy containing chromium, nickel, molybdenum, nitrogen, and iron, featuring a balanced austenitic-ferritic microstructure that combines high strength with excellent resistance to corrosion. These flanges are well suited for piping systems exposed to chlorides, seawater, moisture, and other aggressive process environments and can be supplied in different types, sizes, pressure classes, dimensions, and facing configurations according to application requirements. The chromium content provides strong resistance to general corrosion, while molybdenum and nitrogen enhance protection against pitting and crevice corrosion in chloride-rich conditions. The duplex structure also offers good resistance to chloride-induced stress corrosion cracking and provides higher mechanical strength than many conventional austenitic stainless steels. With its combination of strength, toughness, corrosion resistance, and durability, Duplex Steel F51 Flanges are suitable for oil and gas, chemical processing, petrochemical, offshore, marine, desalination, water treatment, power generation, pulp and paper, and other demanding industrial applications where reliable performance is required.

Duplex F51 Flange, Duplex steel F51 Pipe Flanges, ASTM A182 F51 Flange, Duplex F51 Flanges, Duplex steel F51 Flanges, ANSI B16.5 Duplex F51 Flanges, UNS S31803 Flanges, Ferritic Stainless Steel F51 Plate Flanges, 1.4462 Flanges, Duplex F51 Forged Flanges, UNS S31803 Flange, Duplex F51 Flanges Manufacturer in Mumbai, India.

Duplex Steel F51 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 impressive strength and outstanding resistance to corrosion. They’re perfect for piping systems that face harsh conditions like chlorides, seawater, moisture, and other aggressive environments. You can find them in various types, sizes, pressure classes, dimensions, and facing configurations tailored to meet specific application needs. The chromium content ensures robust protection against general corrosion, while the addition of molybdenum and nitrogen boosts resistance to pitting and crevice corrosion, especially in chloride-heavy settings. Plus, the duplex structure helps prevent chloride-induced stress corrosion cracking and offers greater mechanical strength compared to many traditional austenitic stainless steels. With their remarkable combination of strength, toughness, corrosion resistance, and durability, Duplex Steel F51 Flanges are ideal for a wide range of demanding industrial applications, including oil and gas, chemical processing, petrochemical, offshore, marine, desalination, water treatment, power generation, pulp and paper, and more, where dependable performance is a must.

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Competitive Price of Duplex steel F51 Slip on Flange, Ready Stock of F51 Duplex Flange, Largest Stockholder of Duplex steel F51 Flanges in India, Duplex steel F51 Pipe Flanges Trader, Duplex F51 Industrial Flanges, Duplex F51 Reducing Flanges, Duplex F51 SWRF Flanges, Ferritic Stainless Steel F51 Weld Neck Flanges, ASTM A182 F51 Socket weld Flanges Manufacturers in Mumbai, India.

Composition of Duplex Steel F51 Flanges

Duplex Steel F51 Flanges are manufactured from an iron-based duplex stainless steel alloy containing chromium, nickel, molybdenum, nitrogen, and controlled amounts of other alloying elements. Its dual austenitic-ferritic structure provides a useful balance of mechanical strength, toughness, and corrosion resistance. Chromium forms a protective passive layer that helps resist general corrosion, while molybdenum and nitrogen improve the alloy’s resistance to pitting and crevice corrosion, particularly in chloride-containing environments. Nickel helps maintain the austenitic phase and contributes to toughness and ductility, while nitrogen further increases strength and supports localized corrosion resistance. This balanced alloy composition allows Duplex F51 Flanges to perform reliably in challenging conditions involving seawater, chlorides, moisture, and corrosive process fluids, making them suitable for oil and gas, chemical processing, petrochemical, offshore, marine, desalination, water treatment, and power generation applications.

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Duplex F51 Flanges Specification

A182 Gr F51 Flange Size Chart1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000
Duplex steel F51 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 Grade F51 Flange Pressure Rating ANSIClass 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS
ASTM A182 F51 Duplex Flanges Pressure Calculation in DIN6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64
ASME SA 182 F51 Flange5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K
ASME SA182 F51 Duplex steel Flange UNI6Bar 10Bar 16Bar 25Bar 40Bar
A182 F51 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 F51 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 F51 Flange Production techniqueForged, Heat treated and machined
A182 Grade F51 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 F51 Flange TestDirect-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector
ASTM A182 Ferritic Stainless Steel F51 Flange EquipmentPress machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc
Duplex F51 Flange OriginIndian / West Europe / Japan / USA / Korean
Manufacturer of Duplex steel ASTM A182 F51 Flange

ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc.
ASTM A182 F51 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 F51 Duplex Flanges
The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276
ASME SA182M Duplex F51 Flange Uses & applicationBitumen upgraders.
Heavy oil refineries.
Nuclear power (mostly seamless).
Petrochemicals and acids.
Duplex F51 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 F51 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 F51 Flange Forms & Availability

ProductsSize
ASTM A182 Duplex F51 Slip-On FlangesASTM A182 Duplex F51 Threaded FlangesSizes 1/8″ – 36″
Raised Face or Flat Face
ASTM A182 Duplex F51 Weld Neck FlangesASTM A182 Duplex F51 Socket Weld Flanges
ASTM A182 Duplex F51 Blind FlangesASTM A182 Duplex F51 Reducing Flanges
ASTM A182 Duplex F51 Lap Joint FlangesASTM A182 Duplex F51 Plate Flanges
ASTM A182 Duplex F51 Orifice FlangesASTM A182 Duplex F51 Forged Flanges
ASTM A182 Duplex F51 Ring Type Joint FlangesASTM A182 Duplex F51 Square Flanges

Buy Duplex steel UNS S31803 Threaded Flanges, Duplex F51 Forged Flanges, Grade F51 Duplex steel Plate Flanges Dealer, Duplex F51 SORF Flanges, ASME SA182 F51 RTJ Flanges, Duplex Steel 1.4462 Lap Joint Flanges Wholesaler, Ferritic Stainless Steel F51 Long Weld Neck Flanges, F51 Duplex Flanges Stockist, ANSI B16.5 F51 Duplex Blind Flanges, Duplex F51 Orifice Flange, F51 Duplex Spectacle Blind Flanges Supplier in Mumbai, India.

Equivalent Grades Duplex F51 Flanges

STANDARDWERKSTOFF NR.UNS
Duplex F511.4462S31803

Chemical Composition of Duplex steel F51 Plate Flanges

GradeCMnSiPSCrMoNiNFe
Duplex F510.030 max2.00 max1.00 max0.030 max0.020 max22 – 233.0 – 3.54.50 – 6.500.14 – 0.2063.72 min

Mechanical Properties of Duplex A182 F51 Forged Flanges

DensityMelting PointTensile StrengthYield Strength (0.2%Offset)Elongation
7.8 g/cm31350 °C (2460 °F)Psi – 80000 , MPa – 550Psi – 116000 , MPa – 80015 %

 

Duplex Steel F51 Flanges can be supplied in either Pipe or Plate construction and are covered by specification ASTM A182 and ASME B16.5.

Duplex Steel F51 Flanges are available in forged and plate construction, depending on the flange type, size, pressure rating, and application requirements. These flanges are manufactured according to recognized material and dimensional standards to ensure consistent quality, accurate fitment, and dependable performance in industrial piping systems. Forged Duplex F51 Flanges are generally supplied in accordance with ASTM A182 / ASME SA182, while standard flange dimensions are commonly manufactured to ASME B16.5 requirements. For larger-diameter piping applications, ASME B16.47 may be followed where applicable. These established standards help maintain dimensional consistency, material traceability, pressure compatibility, and reliable installation with pipes, valves, pumps, vessels, and other connected equipment.

Duplex Steel F51 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 F51 Flanges as per DIN, ISO, JIS or ANSI Standard.

We supply Duplex Steel F51 Flanges in accordance with recognized international standards such as DIN, ISO, JIS, and ANSI, supporting the varied requirements of industrial piping systems, process plants, and engineering projects. Our flanges can be supplied in different sizes, dimensions, pressure classes, facing types, and configurations to suit specific installation conditions and operating requirements. At Jai Hind Metal, we focus on maintaining consistent material quality, dimensional accuracy, surface finish, and reliable workmanship while supplying Duplex F51 Flanges according to applicable standards and customer specifications. Project-specific requirements such as drawings, inspection procedures, material documentation, product markings, testing requirements, and customized configurations can also be accommodated where required. For product details, technical specifications, or customized requirements, email us at info@jaihindmetal.com.

Duplex Steel F51 Flanges are widely used to create 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 demanding environments where conventional materials may face challenging service conditions. These flanges are commonly used in oil and gas facilities, chemical processing plants, petrochemical units, offshore platforms, marine systems, desalination plants, water treatment facilities, power generation, pulp and paper industries, and process piping, particularly in applications involving seawater, chlorides, moisture, and corrosive fluids. The balanced properties of Duplex F51 provide dependable strength, toughness, corrosion resistance, and durability for piping and equipment connections operating under demanding conditions.

Uses & Applications of Duplex Steel F51 Flanges

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Email: info@jaihindmetal.com

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.

Marine Applications ↗
Oil & Gas ↗
Chemical Processing ↗
Aerospace ↗
Power Generation ↗
Salt Production ↗
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.