DIN 2633 PN16 Weld Neck Flanges are engineered for strength, balance, and long-term reliability in medium-pressure piping systems. Manufactured in strict accordance with German DIN standards, these flanges feature a tapered weld neck that ensures smooth stress distribution and strong, leak-resistant joints. Their PN16 rating supports stable performance under moderate pressure and temperature conditions. Precision-machined for accurate alignment, they simplify installation while enhancing structural integrity. Widely used in water treatment, chemical processing, power generation, and industrial pipelines, DIN 2633 PN16 Weld Neck Flanges deliver disciplined engineering, dependable sealing, and confident performance where consistency and strength matter most.
DIN 2633 PN16 Weld Neck Flanges are typically made from carbon steel, alloy steel, or stainless steel, offering high strength and corrosion resistance. Mechanically, they provide excellent tensile strength, toughness, and the ability to withstand medium-pressure and temperature variations. The weld neck design minimizes stress at the joint, ensuring durability and leak-proof performance. Advantages include secure, reliable connections, enhanced alignment, and reduced risk of failure, making them ideal for demanding applications in industries like oil and gas, petrochemical, and water treatment, where performance and safety are critical.
| 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 2633 welding neck flanges; nominal pressure 16 |
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Brides à souder à collerette DIN 2633: 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 |
Faizan Flanges, a leading supplier in Doha, Qatar, offers an extensive selection of DIN 2633 PN16 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.
DIN 2633 PN16 Weld Neck Flanges are used in medium-pressure piping systems across industries such as oil and gas, petrochemical, water treatment, and power generation. Their robust design ensures secure, leak-proof connections between pipes, valves, and equipment, making them ideal for systems exposed to fluctuating temperatures and pressures. Commonly installed in critical applications, these flanges provide reliable performance and stability in process pipelines, pumps, and compressors. Their durability and precise alignment make them essential for maintaining system integrity and optimizing operational efficiency in high-demand environments.
Yes, we offer custom sizes for DIN 2633 PN16 Weld Neck Flanges to meet specific project needs. Our team at Faizan Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@faizanflanges.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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