Strategically situated in the industrial hub of Manama, Bahrain, Rizwan Flanges has built a strong reputation for delivering exceptional piping solutions. Our focus today is on a particular engineering marvel: Duplex Steel Weldneck Flanges. We understand that in demanding environments, reliability is non-negotiable, which is why we produce these flanges with meticulous attention to detail, ensuring they offer superior performance and longevity for the most challenging applications across the region and beyond, solidifying critical connections where it matters most.
The distinct advantage of Duplex Steel lies in its unique metallurgical composition, which artfully balances austenitic and ferritic microstructures. This blend grants the weldneck flanges an impressive combination of high strength and outstanding corrosion resistance. They possess remarkable durability against stress corrosion cracking and pitting, especially when faced with chlorides. This robust mechanical profile means these components can handle higher pressures and loads compared to standard stainless steels, all while maintaining excellent toughness for long-term service life.
| Specification | ASTM A182 / ASME SA182 |
|---|---|
| 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, MDuplex Steel S44, ISO70051, JISF51220, 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 |
| 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. B.S: BS4504 , BS3293, BS1560, BS10 The other standard: AWWA C207; EN1092-1, GOST12820, JIS F51220; KS B1503, SABS1123; NFE29203; UNI2276 |
| Grades | Duplex Steel S32205, S31803, F51, F60 |
| Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 | |
Rizwan Flanges, a leading supplier in Manama, Bahrain, offers an extensive selection of Duplex Steel Weldneck 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 weldneck flanges are required where strength and corrosion resistance are required. In the oil and gas industry pipelines connect water and treat offshore and onshore flows providing longevity in harsh environments with high chloride levels in chemical plants using these flanges use to transport corrosive materials and benefit from acid and caustic resistance. Power manufacturers rely on duplex steel weldneck flanges for high temperature high pressure piping systems to ensure safe and continuous operation including for use in marine engineering, desalination and wastewater treatment are functional. Where their durable construction and stress-corrosion resistance counteract longevity system reliability and scalability.
| STANDARD | WERKSTOFF NR. | UNS |
| Duplex S31803 | 1.4462 | S31803 |
| Duplex 2205 | 1.4462 | S32205 |
| ASME/ANSI B 16.5 | Welding Neck Flange |
| PRESSURE CLASS | 150, 300, 400, S32205, 900, 1500, 2500 |
| ASME/ANSI B 16.47 | Blind Flange [Series A & B],Welding Neck Flange |
| PRESSURE CLASS | 75, 150, 300, 400, S32205, 900 |
| ASME/ANSI B 16.36 | Welding Neck Flange |
| PRESSURE CLASS | 300, 400, S32205, 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 Threaded |
| PRESSURE CLASS | 150, 300, 400, S32205, 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 Weldneck Flanges to meet specific project needs. Our team at Rizwan Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@rizwanflanges.com.
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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