Hudson Flanges is a trusted duplex flat steel manufacturer and supplier in the Midlands, UK. Our Duplex Steel Flat Flanges are engineered to provide exceptional strength, corrosion resistance and reliability in demanding industrial applications. Made from a combination of austenitic and ferritic stainless steel. These flanges provide excellent performance under high pressure and high temperature conditions Ideal for the oil and gas industry. We ensure that everything is manufactured to the highest quality. Our Duplex Steel Flat Flanges are engineered to meet the toughest operating challenges while maintaining long-term durability.
Duplex steel flat flanges are made from a mixture of austenite and ferritic stainless steel. Typically containing 22% chromium, 5% nickel and molybdenum. This material provides high strength, corrosion resistance and durability. Mechanical properties include high tensile strength (up to 620 MPa) and excellent resistance to weak stress cracking, pitting, and crevice corrosion. Advantages of thin duplex steel flanges include functionality good in aggressive environments, high strength-to-weight ratio, cost-effectiveness comparable to pure austenite grades f well-defined, and make it ideal for applications in the petrochemical, marine and offshore industries.
Specification | ASTM A182 / ASME SA182 |
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Size Chart | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
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, JISS32205220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
Pressure Rating ANSI | Class 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS |
Pressure Calculation in DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
EN | 6Bar 10Bar 16Bar 25Bar 40Bar |
Coating | Oil Black Paint, Anti-rust Paint, Zinc Plated, Yellow Transparent, Cold and Hot Dip Galvanized |
Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
Production Technique | Forged, Heat treated and machined |
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 15 NB (1/2″) to 200 NB (8″) Equal and Reducing Configurations |
Test | Direct-reading Spectrograph, Hydrostatic testing machine, F60-ray detector, UI trasonic flaw detector, Magnetic particle detector |
Equipment | Press machine, Bending machine, Pushing Machine, electric bevelling machine, Sand-blasting machine etc |
Manufacturer of | ANSI DIN, GOST, JIS, UNI, BS, AS2129, AWWA, EN, SABS, NFE etc. 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 Steel Flanges The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276 |
Grades | Duplex Steel S31803, F51, S32205, F60 |
Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 |
Hudson Flanges, a leading supplier in Midland, UK, offers an extensive selection of Duplex Steel Flat Flanges, including weld neck flanges, slip-on flanges, blind flanges, threaded flanges, and lap joint flanges. Designed for diverse industrial applications, our high-quality inventory and commitment to exceptional service make us a trusted choice for flange products in the region.
Duplex Steel Flat Flanges are commonly used in applications requiring high strength and corrosion resistance. Widely used in oil, gas, chemical, petrochemical, electricity generation and water treatment for applications such as pipe connections, valves and pumps. These flanges are ideal for high pressure, high temperature and areas corrosion, including coastal platforms, desalination plants and refineries. Flanges for excellent resistance to chloride stress corrosion resistance and makes it perfect for marine and offshore applications. Their reliable performance ensures durability and longevity in critical pipeline systems and reduces maintenance and operational downtime.
STANDARD | WERKSTOFF NR. | UNS |
Duplex S31803 | 1.4462 | S31803 |
Duplex 2205 | 1.4462 | S32205 |
ASME/ANSI B 16.5 | Flat Face Flange |
PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
ASME/ANSI B 16.47 | Blind Flange [Series A & B],Flat Face Flange |
PRESSURE CLASS | 75, 150, 300, 400, 600, 900 |
ASME/ANSI B 16.36 | Flat Face Flange |
PRESSURE CLASS | 300, 400, 600, 900, 1500, 2500 |
PRESSURE CLASS | PN 2.5 TO PN 40 |
BS 4504[PART 1] | Hubbed Slip-On |
PRESSURE CLASS | PN 2.5 TO PN 400 |
BS 1560 BOSS | Hubbed Slip-On Hubbed Flat Face |
PRESSURE CLASS | 150, 300, 400, 600, 900, 1500, 2500 |
BS10 | Plate Slip-On Flange, Slip-On Boss 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 |
Yes, we offer custom sizes for Duplex Steel Flat Flanges to meet specific project needs. Our team at Hudson Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@hudsonflanges.co.uk.
We are renowned for delivering products with precise, accurate dimensions. Each product undergoes thorough testing, both destructive and non-destructive, to ensure quality before being shipped to our customers.
Our team is ready to assist you. Contact us for any queries or personalized solutions.
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