Ronwen Flanges, located in Cape Town, South Africa, stands out as a top-notch manufacturer and supplier of high-quality industrial flanges, with a special focus on **Alloy 20 Slip-On flanges**. Renowned for their precision engineering and robust performance, Ronwen Flanges caters to industries that require exceptional corrosion resistance and reliability, such as the chemical, petrochemical, and pharmaceutical sectors. Their Alloy 20 Slip-On flanges are crafted to meet stringent international standards, guaranteeing consistent quality and outstanding performance even in harsh chemical environments. By merging cutting-edge manufacturing techniques with thorough quality control, Ronwen Flanges provides flanges that ensure secure connections, a long service life, and dependable performance in the toughest industrial applications.
Alloy 20 Slip-On flanges are primarily made up of iron, nickel (30–35%), chromium (19–21%), copper (2–3%), along with trace amounts of molybdenum, manganese, and carbon. This unique composition gives them remarkable resistance to strong acids, especially sulfuric acid, while also maintaining impressive mechanical strength. Typical mechanical properties include a tensile strength ranging from 550 to 750 MPa, yield strength between 250 and 450 MPa, and an elongation of 25 to 35%. These flanges are known for their exceptional corrosion resistance, durability, and thermal stability, making them perfect for high-temperature and highly corrosive environments where both strength and chemical resistance are vital.
| Specification | ASTM B462 / ASME SB462 |
|---|---|
| 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, MAlloy 20 S44, ISO70051, JISB2220, BS1560-3.1, API7S-15, API7S-43, API605, EN1092 |
| PRESSURE Rating ANSI | Class 150 LBS, 300 LBS, 400 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, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| Equipment | Premonel 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, MAlloy 20 SP44, ASA, API-605, AWWA, Custom Drawings ANSI : ANSI B16.5, ANSI B16.47(API605), MAlloy 20 SP44, ANSI B16.36, ANSI B16.48 ANSI B16.5, ANSI B16.47, MAlloy 20 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 B462 FAlloy 20 Flanges The other standard: AWWA C207; EN1092-1, GOST12820, JIS B2220; KS B1503, SABS1123; NFE29203; UNI2276 |
| Grades | Alloy 20 |
| Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 | |
Ronwen Flanges, a leading supplier in Cape Town, South Africa, offers an extensive selection of Alloy 20 Slip on 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.
Alloy 20 Slip-On flanges find extensive use in chemical processing plants, petrochemical industries, pharmaceutical manufacturing, and pulp and paper applications, where resistance to strong acids and corrosive fluids is crucial. They are ideal for piping systems, pressure vessels, and heat exchangers, providing secure, leak-proof connections. Their slip-on design simplifies alignment and installation, cutting down on labor time while ensuring reliable sealing. These flanges are essential in industries that demand durable, high-performance components capable of withstanding challenging conditions.
| STANDARD | WERKSTOFF NR. | UNS | AFNOR | EN |
| Alloy 20 | 2.4660 | N08020 | Z2NCUD31-20AZ | NiCr20CuMo |
| ASME/ANSI B 16.5 | Slip on 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 |
| 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 Threaded |
| 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 Alloy 20 Slip on Flanges to meet specific project needs. Our team at Ronwen Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@ronwenflanges.co.za.
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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