Ronwen Flanges is a reputable manufacturer and supplier of ANSI B16.36 flanges, proudly based in Cape Town, South Africa. The company focuses on crafting top-notch large-diameter steel flanges that adhere to the American National Standards Institute (ANSI) B16.36 specifications. These flanges are specifically designed for large piping systems, ensuring dependable connections across various industries, including oil and gas, petrochemical, power generation, and water treatment. Ronwen Flanges utilizes high-quality materials such as carbon steel, stainless steel, and alloy steel to produce ANSI B16.36 flanges, delivering outstanding strength, corrosion resistance, and durability for even the most demanding applications.
Manufactured according to strict standards, ANSI B16.36 flanges come with specified dimensions, tolerances, pressure ratings, and materials for large steel flanges that range from 26 inches to 60 inches in diameter. These flanges are perfect for high-pressure and high-temperature settings, providing excellent mechanical strength and reliable sealing capabilities. The standard includes both weld neck and slip-on flange types, ensuring they fit seamlessly with various piping systems. Their sturdy construction allows them to endure mechanical stresses, thermal expansion, and corrosive environments.
Ronwen Flanges, a leading supplier in Cape Town, South Africa, offers an extensive selection of ANSI B16.36 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.
| Size Range | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000 |
|---|---|
| DIN | 6Bar 10Bar 16Bar 25Bar 40Bar / PN6 PN10 PN16 PN25 PN40, PN64 |
| JIS | 5K, 10 K, 16 K 20 K, 30 K, 40 K, 63 K |
| UNI | 6Bar 10Bar 16Bar 25Bar 40Bar |
| EN | 6Bar 10Bar 16Bar 25Bar 40Bar |
| Main Types | Threaded / Forged / Plate /Screwed |
| Flange supporting material | Ring Joint, Gasket, Flange Bolts |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Most Common Types |
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| Production technique |
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| Connect Type/ Flange Face Type | Ring Type Joint (RTJ), Raised Face (RF),Large Male-Female (LMF), Flat Face (FF),Small Male-Female (SMF), Lap-Joint Face (LJF), Large Tongue & Groove, Small Tongue, 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 Threaded Flange, Socketweld Flange, Slip-On Flange, Blind Flange, Weld Neck Flange |
| Test | Direct-reading Spectrograph, Hydrostatic testing machine, X-ray detector, UI trasonic flaw detector, Magnetic particle detector |
| Equipment | Bending machine, Press machine, electric bevelling machine, Pushing Machine, Sand-blasting machine etc |
| Origin | Indian / West Europe / Japan / USA / Korean |
| Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 | |
| NPS | O | C | R | X | A | Y | TT | No. of holes | Diameter of holes | Diameter of bolts | Diameter of bolt circle | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| inch | 1″ | 4.88 | 1.5 | 2 | 2.12 | 1.32 | 3.25 | 01/04/07 | 4 | 0.69 | 5/8″ | 3.5 |
| Millimeter | 124 | 38.1 | 50.8 | 53.8 | 33.5 | 82.6 | 6.4 | 17.5 | 15.9 | 88.9 | ||
| Inch | 1 1/2″ | 6.12 | 1.5 | 2.88 | 2.75 | 1.9 | 3.38 | 01/04/07 | 4 | 0.81 | 3/4″ | 4.5 |
| Millimeter | 155.4 | 38.1 | 73.2 | 69.9 | 48.3 | 85.9 | 6.4 | 20.6 | 19.1 | 114.3 | ||
| Inch | 2″ | 6.5 | 1.5 | 3.62 | 3.31 | 2.38 | 3.38 | 01/04/07 | 8 | 0.69 | 5/8″ | 5 |
| Millimeter | 165.1 | 38.1 | 91.9 | 84.1 | 60.5 | 85.9 | 6.4 | 17.5 | 15.9 | 127 | ||
| Inch | 2 1/2″ | 7.5 | 1.5 | 4.12 | 3.94 | 2.88 | 3.5 | 01/04/07 | 8 | 0.81 | 3/4″ | 5.88 |
| Millimeter | 190.5 | 38.1 | 104.6 | 100.1 | 73.2 | 88.9 | 6.4 | 20.6 | 19.1 | 149.4 | ||
| Inch | 3″ | 8.25 | 1.5 | 5 | 4.62 | 3.5 | 3.5 | 03/08/07 | 8 | 0.81 | 3/4″ | 6.62 |
| Millimeter | 209.6 | 38.1 | 127 | 117.3 | 88.9 | 88.9 | 9.5 | 20.6 | 19.1 | 168.1 | ||
| Inch | 4″ | 10 | 1.5 | 6.19 | 5.75 | 4.5 | 3.62 | 01/02/07 | 8 | 0.81 | 3/4″ | 7.88 |
| Millimeter | 254 | 38.1 | 157.2 | 146.1 | 114.3 | 91.9 | 12.7 | 20.6 | 19.1 | 200.2 | ||
| Inch | 6″ | 12.5 | 1.5 | 8.5 | 8.12 | 6.63 | 3.94 | 01/02/07 | 12 | 0.88 | 3/4″ | 10.62 |
| Millimeter | 317.5 | 38.1 | 215.9 | 206.2 | 168.4 | 100.1 | 12.7 | 22.4 | 19.1 | 269.7 | ||
| Inch | 8″ | 15 | 1.62 | 10.62 | 10.25 | 8.63 | 4.38 | 01/02/07 | 12 | 1 | 7/8″ | 13 |
| Millimeter | 381 | 41.1 | 269.7 | 260.4 | 219.2 | 111.3 | 12.7 | 25.4 | 22.2 | 330.2 | ||
| Inch | 10″ | 17.5 | 1.88 | 12.75 | 12.62 | 10.75 | 4.62 | 01/02/07 | 16 | 1.12 | 1″ | 15.25 |
| Millimeter | 444.5 | 47.8 | 323.9 | 320.5 | 273.1 | 117.3 | 12.7 | 28.4 | 25.4 | 387.4 | ||
| Inch | 12″ | 20.5 | 2 | 15 | 14.75 | 12.75 | 5.12 | 01/02/07 | 16 | 1.25 | 1 1/8″ | 17.75 |
| Millimeter | 520.7 | 50.8 | 381 | 374.7 | 323.9 | 130 | 12.7 | 31.8 | 28.6 | 450.9 | ||
| Inch | 14″ | 23 | 2.12 | 16.25 | 16.75 | 14 | 5.62 | 01/02/07 | 20 | 1.25 | 1 1/8″ | 20.25 |
| Millimeter | 584.2 | 53.8 | 412.8 | 425.5 | 355.6 | 142.7 | 12.7 | 31.8 | 28.6 | 514.4 | ||
| Inch | 16″ | 25.5 | 2.25 | 18.5 | 19 | 16 | 5.75 | 01/02/07 | 20 | 1.38 | 1 1/4″ | 22.5 |
| Millimeter | 647.7 | 57.2 | 469.9 | 482.6 | 406.4 | 146.1 | 12.7 | 35.1 | 31.8 | 571.5 | ||
| Inch | 18″ | 28 | 2.38 | 21 | 21 | 18 | 6.25 | 01/02/07 | 24 | 1.38 | 1 1/4″ | 24.75 |
| Millimeter | 711.2 | 60.5 | 533.4 | 533.4 | 457.2 | 158.8 | 12.7 | 35.1 | 31.8 | 628.7 | ||
| Inch | 20″ | 30.5 | 2.5 | 23 | 23.12 | 20 | 6.38 | 01/02/07 | 24 | 1.38 | 1 1/4″ | 27 |
| Millimeter | 774.7 | 63.5 | 584.2 | 587.2 | 508 | 162.1 | 12.7 | 35.1 | 31.8 | 685.8 | ||
| Inch | 24″ | 36 | 2.75 | 27.25 | 27.62 | 24 | 6.62 | 01/02/07 | 24 | 1.62 | 1 1/2″ | 32 |
| Millimeter | 914.4 | 69.9 | 692.2 | 701.5 | 609.6 | 168.1 | 12.7 | 41.1 | 38.1 | 812.8 |
| Size in In. | Size in Millimeter | Outer Diameter | Flange Thickness | Hub OD | Weld Neck OD | WN Lengtd | RF Dia. | RF Height | PCD | Hole dia | No of Bolts | Bolt Size UNC | RF Stud Lengtd | Hole Size | ISO Stud Size | Weight in kg |
| A | B | C | D | E | F | G | H | I | ||||||||
| 1 | 25 | 125 | 36.6 | 54 | 33.4 | 81 | 50.8 | 2 | 88.9 | 6.4 | 4 | 5/8 | 125 | 3/4 | M16 | 4.5 |
| 1 1/2 | 40 | 155 | 36.6 | 70 | 48.3 | 84 | 73 | 2 | 114.3 | 6.4 | 4 | 3/4 | 135 | 7/8 | M20 | 6.5 |
| 2 | 50 | 165 | 36.6 | 84 | 60.3 | 84 | 92.1 | 2 | 127 | 6.4 | 8 | 5/8 | 125 | 3/4 | M16 | 7 |
| 2 1/2 | 65 | 190 | 36.6 | 100 | 73 | 87 | 104.8 | 2 | 149.2 | 6.4 | 8 | 3/4 | 135 | 7/8 | M20 | 7.5 |
| 3 | 80 | 210 | 36.6 | 117 | 88.9 | 87 | 127 | 2 | 168.3 | 9.5 | 8 | 3/4 | 135 | 7/8 | M20 | 9.4 |
| 4 | 100 | 255 | 36.6 | 146 | 114.3 | 90 | 157.2 | 2 | 200 | 12.7 | 8 | 3/4 | 135 | 7/8 | M20 | 13.2 |
| 6 | 150 | 320 | 36.6 | 206 | 168.3 | 98 | 215.9 | 2 | 269.9 | 12.7 | 12 | 3/4 | 135 | 7/8 | M20 | 14.6 |
| 8 | 200 | 380 | 39.7 | 260 | 219.1 | 110 | 269.9 | 2 | 330.2 | 12.7 | 12 | 7/8 | 145 | 1 | M24 | 30 |
| 10 | 250 | 445 | 46.1 | 321 | 273 | 116 | 323.8 | 2 | 387.3 | 12.7 | 16 | 1 | 165 | 1 1/8 | M27 | 41 |
| 12 | 300 | 520 | 49.3 | 375 | 323.8 | 129 | 381 | 2 | 450.8 | 12.7 | 16 | 1 1/8 | 180 | 1 1/4 | M30 | 62 |
| 14 | 350 | 585 | 52.4 | 425 | 355.6 | 141 | 412.8 | 2 | 514.4 | 12.7 | 20 | 1 1/8 | 185 | 1 1/4 | M30 | 84 |
| 16 | 400 | 650 | 55.6 | 483 | 406.4 | 144 | 469.9 | 2 | 571.5 | 12.7 | 20 | 1 1/4 | 195 | 1 3/8 | M33 | 111 |
| 18 | 450 | 710 | 58.8 | 533 | 457 | 157 | 533.4 | 2 | 628.6 | 12.7 | 24 | 1 1/4 | 205 | 1 3/8 | M33 | 138 |
| 20 | 500 | 775 | 62 | 587 | 508 | 160 | 584.2 | 2 | 685.8 | 12.7 | 24 | 1 1/4 | 215 | 1 3/8 | M33 | 171 |
| 24 | 600 | 915 | 68.3 | 702 | 610 | 167 | 692.2 | 2 | 812.8 | 12.7 | 24 | 1 |
You’ll find ANSI B16.36 flanges widely used in large-scale industrial settings, such as oil refineries, chemical plants, power stations, and water treatment facilities. They create secure connections in pipelines that transport liquids, gases, and steam under high pressure. Their substantial size and durability make them crucial for infrastructure projects that demand reliable flange performance and safety. Ronwen Flanges offers ANSI B16.36 flanges that meet rigorous quality standards, providing long-lasting, cost-effective solutions for large-diameter piping networks both in South Africa and beyond.
Yes, we offer custom sizes for ANSI B16.36 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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