Arda Flanges, based in Istanbul, Turkey, stands out as a top manufacturer and supplier of DIN 2634 PN25 Weld Neck Flanges, offering high-quality solutions for medium- to high-pressure piping systems. These flanges are designed with a tapered hub that promotes smooth stress distribution from the flange to the pipe, which boosts structural integrity and helps minimize the risk of fatigue or failure. Built to meet DIN 2634 standards and rated for PN25 pressure, they can handle applications up to 25 bar. Thanks to advanced production facilities, rigorous quality control, and adherence to international standards, Arda Flanges provides durable, reliable, and cost-effective flange solutions for industrial pipelines and equipment.
Typically crafted from carbon steel, stainless steel, or alloy steel, DIN 2634 PN25 Weld Neck Flanges deliver outstanding mechanical strength, corrosion resistance, and dimensional stability. They boast high tensile and yield strength, making them perfect for PN25-rated systems, along with impressive toughness and ductility. The weld neck design facilitates butt welding to the pipe, ensuring a robust, leak-proof connection that can endure high pressures and temperatures. Additionally, the tapered hub helps reduce stress concentration, making these flanges a great choice for critical industrial applications that demand durability and long-lasting performance.
| Size Chart | 1/2″ (15 NB) To 48″ (1200NB) |
| Coating Flanges Faces | Zinc Plated, Oil Black Paint, Yellow Transparent, Cold and Hot Dip Galvanized, Anti-rust Paint |
| Design For Size | DIN, EN, ASA, PN, JIS, BS, ANSI, ASME |
| Pressure Rating Table | Class 150 LBS, Class 300 LBS, Class 600 LBS, Class 900 LBS, Class 1500 LBS, Class 2500 LBS |
| Supporting Flanges Material | Flanges Bolts, Gasket, Ring Joint |
| Connect Type Type | FF, RTJ, SMF, LMF, RF, LJF |
| Production Process | Forged, Heat Treated and Machined |
| Standard | ASME B16.38 Flange, DIN Flange, ISO Flange, JIS Flange, PN Flange, MSS SP44 Flange, EN-1092 Flange, BS10 Flange, ASME B16.47 (Series A, Series B) Flange, UNI Flange, ASME B16.5 Flange, AWWA Flange, DIN Flange, GOST Flange |
| Machining Equipment | Bending machine, Sand-blasting machine, Press machine, Pushing Machine, Electric bevelling machine etc |
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Germany standard flange DIN 2634 welding neck flanges; nominal pressure 16 |
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Brides à souder à collerette DIN 2634: pression nominale 16 |
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| Pipe | Flange | Neck | Raised face | Screws | Weight | |||||||||||
| (7,85 Kg/dm3) | ||||||||||||||||
| Rated | d1 | D | b | k | h1 | d3 | s | r | h2 | d4 | f | Holes | Thread | d2 | Kg | |
| Diameter | ISO Series | DIN Series | ||||||||||||||
| 15 | – | 20 | 95 | 14 | 65 | 35 | 30 | 2 | 4 | 6 | 45 | 2 | 4 | M 12 | 14 | 0,648 |
| 21,3 | – | 32 | ||||||||||||||
| 20 | – | 25 | 105 | 16 | 75 | 38 | 38 | 2,3 | 4 | 6 | 58 | 2 | 4 | M 12 | 14 | 0,952 |
| 26,9 | – | 40 | ||||||||||||||
| 25 | – | 30 | 115 | 16 | 85 | 38 | 42 | 2,6 | 4 | 6 | 68 | 2 | 4 | M 12 | 14 | 1,14 |
| 33,7 | – | 45 | ||||||||||||||
| 32 | – | 38 | 140 | 16 | 100 | 40 | 52 | 2,6 | 6 | 6 | 78 | 2 | 4 | M 16 | 18 | 1,69 |
| 42,4 | – | 56 | ||||||||||||||
| 40 | – | 44,5 | 150 | 16 | 110 | 42 | 60 | 2,6 | 6 | 7 | 88 | 3 | 4 | M 16 | 18 | 1,86 |
| 48,3 | – | 64 | ||||||||||||||
| 50 | – | 57 | 165 | 18 | 125 | 45 | 72 | 2,9 | 6 | 8 | 102 | 3 | 4 | M 16 | 18 | 2,53 |
| 60,3 | – | 75 | ||||||||||||||
| 65 | 76,1 | – | 185 | 18 | 145 | 45 | 90 | 2,9 | 6 | 10 | 122 | 3 | 4 | M 16 | 18 | 3,06 |
| 80 | 88,9 | – | 200 | 20 | 160 | 50 | 105 | 3,2 | 8 | 10 | 138 | 3 | 8 | M 16 | 18 | 3,7 |
| 100 | – | 108 | 220 | 20 | 180 | 52 | 125 | 3,6 | 8 | 12 | 158 | 3 | 8 | M 16 | 18 | 4,62 |
| 114,3 | – | 131 | ||||||||||||||
| 125 | – | 133 | 250 | 22 | 210 | 55 | 150 | 4 | 8 | 12 | 188 | 3 | 8 | M 16 | 18 | 6,3 |
| 139,7 | – | 156 | ||||||||||||||
| 150 | – | 159 | 285 | 22 | 240 | 55 | 175 | 4,5 | 10 | 12 | 212 | 3 | 8 | M 20 | 22 | 7,75 |
| 168,3 | – | 184 | ||||||||||||||
| (175) | 193,7 | – | 315 | 24 | 270 | 60 | 210 | 5,4 | 10 | 12 | 242 | 3 | 8 | M 20 | 22 | 9,85 |
| 200 | 219,1 | – | 340 | 24 | 295 | 62 | 235 | 5,9 | 10 | 16 | 268 | 3 | 12 | M 20 | 22 | 11 |
| 250 | – | 267 | 405 | 26 | 355 | 70 | 285 | 6,3 | 12 | 16 | 320 | 3 | 12 | M 24 | 26 | 15,6 |
| 273 | – | 292 | ||||||||||||||
| 300 | 323,9 | – | 460 | 28 | 410 | 78 | 344 | 7,1 | 12 | 16 | 378 | 4 | 12 | M 24 | 26 | 22 |
| 350 | 355,6 | – | 520 | 30 | 470 | 82 | 390 | 8 | 12 | 16 | 438 | 4 | 16 | M 24 | 26 | 31,2 |
| – | 368 | 28,8 | ||||||||||||||
| 400 | 406,4 | – | 580 | 32 | 525 | 85 | 445 | 8 | 12 | 16 | 490 | 4 | 16 | M 27 | 30 | 39,3 |
| – | 419 | 36,3 | ||||||||||||||
| (450) | 457 | – | 640 | 34 | 585 | 85 | 490 | 8 | 12 | 16 | 550 | 4 | 20 | M 27 | 30 | 44,3 |
| 500 | 508 | – | 715 | 34 | 650 | 90 | 548 | 8 | 12 | 16 | 610 | 4 | 20 | M 30 | 33 | 61 |
| 600 | 610 | – | 840 | 36 | 770 | 95 | 652 | 8,8 | 12 | 18 | 725 | 5 | 20 | M 33 | 36 | 75,4 |
| 700 | 711 | – | 910 | 36 | 840 | 100 | 755 | 8,8 | 12 | 18 | 795 | 5 | 24 | M 33 | 36 | 77 |
| 800 | 813 | – | 1025 | 38 | 950 | 105 | 855 | 10 | 12 | 20 | 900 | 5 | 24 | M 36 | 39 | 101 |
| 900 | 914 | – | 1125 | 40 | 1050 | 110 | 955 | 10 | 12 | 20 | 1000 | 5 | 28 | M 36 | 39 | 122 |
| 1000 | 1016 | – | 1255 | 42 | 1170 | 120 | 1058 | 10 | 16 | 22 | 1115 | 5 | 28 | M 39 | 42 | 162 |
Arda Flanges, a leading supplier in Istanbul, Turkey, offers an extensive selection of DIN 2634 PN25 Weld Neck 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 DIN 2634 PN25 Weld Neck Flanges widely utilized across the oil and gas, petrochemical, chemical processing, power generation, and water treatment sectors. They’re perfect for connecting pipelines, pumps, valves, and pressure vessels in medium- to high-pressure systems, ensuring reliable sealing and operational efficiency. Commonly used in fluid transfer lines, chemical processing pipelines, and high-pressure water or steam networks, these flanges offer robust construction, excellent corrosion resistance, and superior mechanical performance, making them a dependable and long-lasting solution for essential industrial applications.
Yes, we offer custom sizes for DIN 2634 PN25 Weld Neck Flanges to meet specific project needs. Our team at Arda Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@ardaflanges.com.
| NPS NPS (inch) | |||||
|---|---|---|---|---|---|
| Diammeter of Flange (inch) | No. of Bolts | Diammeter of Bolts (inch) | Diammeter of Bolt Holes (inch) | Bolt Circle (inch) | |
| 1/4 | 3-3/8 | 4 | 1/2 | 0.62 | 2-1/4 |
| 1/2 | 3-1/2 | 4 | 1/2 | 0.62 | 2-3/8 |
| 3/4 | 3-7/8 | 4 | 1/2 | 0.62 | 2-3/4 |
| 1 | 4-1/4 | 4 | 1/2 | 0.62 | 3-1/8 |
| 1-1/4 | 4-5/8 | 4 | 1/2 | 0.62 | 3-1/2 |
| 1-1/2 | 5 | 4 | 1/2 | 0.62 | 3-7/8 |
| 2 | 6 | 4 | 5/8 | 0.75 | 4-3/4 |
| 2-1/2 | 7 | 4 | 5/8 | 0.75 | 5-1/2 |
| 3 | 7-1/2 | 4 | 5/8 | 0.75 | 6 |
| 3-1/2 | 8-1/2 | 8 | 5/8 | 0.75 | 7 |
| 4 | 9 | 8 | 5/8 | 0.75 | 7-1/2 |
| 5 | 10 | 8 | 3/4 | 0.88 | 8-1/2 |
| 6 | 11 | 8 | 3/4 | 0.88 | 9-1/2 |
| 8 | 13-1/2 | 8 | 3/4 | 0.88 | 11-3/4 |
| 10 | 16 | 12 | 7/8 | 1 | 14-1/4 |
| 12 | 19 | 12 | 7/8 | 1 | 17 |
| 14 | 21 | 12 | 1 | 1.12 | 18-3/4 |
| 16 | 23-1/2 | 16 | 1 | 1.12 | 21-1/4 |
| 18 | 25 | 16 | 1-1/8 | 1.25 | 22-3/4 |
| 20 | 27-1/2 | 20 | 1-1/8 | 1.25 | 25 |
| 24 | 32 | 20 | 1-1/4 | 1.38 | 29-1/2 |
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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.
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