Ronwen Flanges, located in Cape Town, South Africa, has earned a solid reputation as a reliable manufacturer and supplier of Carbon Steel Weldneck Flanges. These flanges are celebrated for their impressive strength, durability, and meticulous engineering. Built to handle high-pressure and high-temperature situations, they boast remarkable resistance to both corrosion and mechanical stress. Thanks to cutting-edge manufacturing techniques and rigorous quality control, Ronwen Flanges ensures that their products meet international standards, providing dependable performance in essential industries. Their dedication to quality and customer satisfaction has made them a go-to choice for industrial piping and connection solutions.
When it comes to composition, Carbon Steel Weldneck Flanges are made up of carbon, manganese, phosphorus, sulfur, and silicon, creating a robust yet adaptable material. The high carbon content boosts hardness and tensile strength, while manganese adds toughness. These flanges are known for their excellent yield strength, impact resistance, and elongation properties, which guarantee reliable performance even under extreme pressure and temperature conditions. Their consistent grain structure enhances weldability and machinability, making them perfect for demanding industrial settings that require both precision and durability.
| Carbon Steel Weld Neck Flanges Standard | ASTM A105, A350 / ASME SA105, SA 350 ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges |
| Carbon Steel Weld Neck Flange Dimensions | B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN |
| CS Weld Neck Flanges Size | 1/2″ (15 NB) to 48″ (1200NB) DN10~DN5000) |
| Carbon Steel Weld Neck Flanges Class/Pressure |
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| Flange Face Type | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| SA 105 Carbon Steel Weld Neck Flanges Marking | All Flanges are marked as follows: Grade, Standard, Thickness, Heat No. (Or according to the customer’s request.) |
| Delivery Time | 7-15 working days as usual, It will based on the detailed order quantity. |
| Payment Terms | Paypal, Western Union, T/T (Telegraphic Transfer or Wire Transfer), L/C or Trade Assurance 30% deposit & balance before shipping |
| Free Sample | Yes if we have in stock |
| Carbon Steel Weld Neck Flange testing reports |
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| SA 105 Carbon Steel Weld Neck Flanges Origin & Mills | Japanese, Indian, USA, Korean, European, Russian, Ukraine (Strictly No China) |
| Carbon Steel Weld Neck Flange Application & uses |
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Ronwen Flanges, a leading supplier in Cape Town, South Africa, offers an extensive selection of Carbon 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.
You’ll find Carbon Steel Weldneck Flanges in a variety of industries, including oil and gas, power generation, petrochemical, shipbuilding, and water treatment. Their long tapered hub ensures effective stress distribution, making them ideal for high-pressure pipelines and critical fluid transfer systems. They are frequently used to connect pipes, valves, and pumps, ensuring leak-proof joints in process piping systems. With their outstanding mechanical properties and resistance to deformation, these flanges are the preferred choice for applications that involve high temperatures, corrosive environments, and heavy mechanical loads.
| Size in In | Size in Millimeter | (OD) Outer Diameter | Flange Thick. | Hub OD | Weld Neck Outer Diameter | Welding Neck Length | Bore | RF Diameter | RF Height | PCD | Weld Face |
| A | B | C | D | E | F | G | H | I | J | ||
| 1/2 | 15 | 95 | 12.7 | 38 | 21.3 | 51 | Refer Note | 34.9 | 2 | 66.7 | 1.6 |
| 3/4 | 20 | 115 | 14.3 | 48 | 26.7 | 56 | 42.9 | 2 | 82.6 | 1.6 | |
| 1 | 25 | 125 | 15.9 | 54 | 33.4 | 60 | 50.8 | 2 | 88.9 | 1.6 | |
| 1 1/4 | 32 | 135 | 17.5 | 64 | 42.2 | 64 | 63.5 | 2 | 98.4 | 1.6 | |
| 1 1/2 | 40 | 155 | 19.1 | 70 | 48.3 | 67 | 73 | 2 | 114.3 | 1.6 | |
| 2 | 50 | 165 | 20.7 | 84 | 60.3 | 68 | 92.1 | 2 | 127 | 1.6 | |
| 2 1/2 | 65 | 190 | 23.9 | 100 | 73 | 75 | 104.8 | 2 | 149.2 | 1.6 | |
| 3 | 80 | 210 | 27 | 117 | 88.9 | 78 | 127 | 2 | 168.3 | 1.6 | |
| 3 1/2 | 90 | 230 | 28.6 | 133 | 101.6 | 79 | 139.7 | 2 | 184.2 | 1.6 | |
| 4 | 100 | 255 | 30.2 | 146 | 114.3 | 84 | 157.2 | 2 | 200 | 1.6 | |
| 5 | 125 | 280 | 33.4 | 178 | 141.3 | 97 | 185.7 | 2 | 235 | 1.6 | |
| 6 | 150 | 320 | 35 | 206 | 168.3 | 97 | 215.9 | 2 | 269.9 | 1.6 | |
| 8 | 200 | 380 | 39.7 | 260 | 219.1 | 110 | 269.9 | 2 | 330.2 | 1.6 | |
| 10 | 250 | 445 | 46.1 | 321 | 273 | 116 | 323.8 | 2 | 387.4 | 1.6 | |
| 12 | 300 | 520 | 49.3 | 375 | 323.8 | 129 | 381 | 2 | 450.8 | 1.6 | |
| 14 | 350 | 585 | 52.4 | 425 | 355.6 | 141 | 412.8 | 2 | 514.4 | 1.6 | |
| 16 | 400 | 650 | 55.6 | 483 | 406.4 | 144 | 469.9 | 2 | 571.5 | 1.6 | |
| 18 | 450 | 710 | 58.8 | 533 | 457 | 157 | 533.4 | 2 | 628.6 | 1.6 | |
| 20 | 500 | 775 | 62 | 587 | 508 | 160 | 584.2 | 2 | 685.8 | 1.6 | |
| 24 | 600 | 915 | 68.3 | 702 | 610 | 167 | 692.2 | 2 | 812.8 | 1.6 |
| Welding Neck Flange Bores (in inch) | ||||||||||||||
| NPS | O D | Sch 10 | Sch 20 | Sch 30 | Std. Wall | Sch 40 | Sch 60 | Extra Strong | Sch 80 | Sch 100 | Sch 120 | Sch 140 | Sch 160 | Double Extra Strong |
| 1/2” | 0.840 | 0.674 | 0.622 | 0.622 | 0.546 | 0.546 | 0.464 | 0.252 | ||||||
| 3/4” | 1.050 | 0.884 | 0.824 | 0.824 | 0.742 | 0.742 | 0.612 | 0.434 | ||||||
| 1” | 1.315 | 1.097 | 1.049 | 1.049 | 0.957 | 0.957 | 0.815 | 0.599 | ||||||
| 1.1/4” | 1.660 | 1.442 | 1.380 | 1.380 | 1.278 | 1.278 | 1.160 | 0.896 | ||||||
| 1.1/2” | 1.900 | 1.682 | 1.610 | 1.610 | 1.500 | 1.500 | 1.338 | 1.100 | ||||||
| 2” | 2.375 | 2.157 | 2.067 | 2.067 | 1.939 | 1.939 | 1.687 | 1.503 | ||||||
| 2.1/2” | 2.875 | 2.635 | 2.469 | 2.469 | 2.323 | 2.323 | 2.125 | 1.771 | ||||||
| 3” | 3.500 | 3.260 | 3.068 | 3.068 | 2.900 | 2.900 | 2.624 | 2.300 | ||||||
| 3-1/2” | 4.000 | 3.760 | 3.548 | 3.548 | 3.364 | 3.364 | 2.728 | |||||||
| 4” | 4.500 | 4.260 | 4.026 | 4.026 | 3.826 | 3.826 | 3.624 | 3.438 | 3.152 | |||||
| 5” | 5.563 | 5.295 | 5.047 | 5.047 | 4.813 | 4.813 | 4.563 | 4.313 | 4.063 | |||||
| 6” | 6.625 | 6.357 | 6.065 | 6.065 | 5.761 | 5.761 | 5.501 | 5.187 | 4.897 | |||||
| 8” | 8.625 | 8.329 | 8.125 | 8.071 | 7.981 | 7.981 | 7.813 | 7.625 | 7.625 | 7.437 | 7.187 | 7.001 | 6.813 | 6.875 |
| 10” | 10.750 | 10.420 | 10.250 | 10.136 | 10.020 | 10.020 | 9.750 | 9.750 | 9.562 | 9.312 | 9.062 | 8.750 | 8.500 | 8.750 |
| 12” | 12.750 | 12.390 | 12.250 | 12.090 | 12.000 | 11.938 | 11.626 | 11.750 | 11.374 | 11.062 | 10.750 | 10.500 | 10.126 | 10.750 |
| 14” | 14.000 | 13.500 | 13.376 | 13.250 | 13.250 | 13.124 | 12.812 | 13.000 | 12.500 | 12.124 | 11.814 | 11.500 | 11.188 | |
| 16” | 16.000 | 15.500 | 15.376 | 15.250 | 15.250 | 15.000 | 14.688 | 15.000 | 14.312 | 13.938 | 13.564 | 13.124 | 12.812 | |
| 18” | 18.000 | 17.500 | 17.376 | 17.124 | 17.250 | 16.876 | 16.500 | 17.000 | 16.124 | 15.688 | 15.250 | 14.876 | 14.438 | |
| 20” | 20.000 | 19.500 | 19.250 | 19.000 | 19.250 | 18.812 | 18.376 | 19.000 | 17.938 | 17.438 | 17.000 | 16.500 | 16.062 | |
| 24” | 24.000 | 23.500 | 23.250 | 22.876 | 23.250 | 22.624 | 22.062 | 23.000 | 21.562 | 20.938 | 20.376 | 19.876 | 19.312 | |
| 30” | 30.000 | 29.376 | 29.000 | 28.750 | 29.250 | 29.000 | ||||||||
| 36” | 36.000 | 35.376 | 35.000 | 34.750 | 35.250 | 34.500 | 35.000 | |||||||
| 42” | 42.000 | 41.250 | 41.000 | |||||||||||
Yes, we offer custom sizes for Carbon Steel Weldneck 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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