Welcome to Khun Flanges, a trusted name in precision manufacturing based in Naypyidaw, Myanmar. We take pride in producing high-quality industrial components that meet rigorous international standards, with our DIN 2635 PN40 Weld Neck Flanges standing as a testament to this commitment. Engineered for durability and reliability in demanding environments, these flanges are the cornerstone of secure and efficient piping systems, reflecting our dedication to supporting Myanmar’s growing infrastructure and industrial sectors with locally-made, world-class products.
Crafted to the exacting specifications of the DIN 2635 standard for a Pressure Nominal of 40, these weld neck flanges are typically manufactured from robust materials like carbon steel or stainless steel. This careful composition ensures exceptional mechanical properties, including high tensile strength and excellent impact resistance. The extended neck is seamlessly integrated, providing superior structural integrity that effectively distributes stress away from the pipe wall, making them ideal for handling high-pressure and high-temperature applications without compromise.
| 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 |
| 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 | 16 | 65 | 38 | 30 | 2 | 4 | 6 | 45 | 2 | 4 | M 12 | 14 | 0,746 |
| 21,3 | – | 32 | ||||||||||||||
| 20 | – | 25 | 105 | 18 | 75 | 40 | 38 | 2,3 | 4 | 6 | 58 | 2 | 4 | M 12 | 14 | 1,06 |
| 26,9 | – | 40 | ||||||||||||||
| 25 | – | 30 | 115 | 18 | 85 | 40 | 42 | 2,6 | 4 | 6 | 68 | 2 | 4 | M 12 | 14 | 1,29 |
| 33,7 | – | 45 | ||||||||||||||
| 32 | – | 38 | 140 | 18 | 100 | 42 | 52 | 2,6 | 6 | 6 | 78 | 2 | 4 | M 16 | 18 | 1,88 |
| 42,4 | – | 56 | ||||||||||||||
| 40 | – | 44,5 | 150 | 18 | 110 | 45 | 60 | 2,6 | 6 | 7 | 88 | 3 | 4 | M 16 | 18 | 2,33 |
| 48,3 | – | 64 | ||||||||||||||
| 50 | – | 57 | 165 | 20 | 125 | 48 | 72 | 2,9 | 6 | 8 | 102 | 3 | 4 | M 16 | 18 | 2,82 |
| 60,3 | – | 75 | ||||||||||||||
| 65 | 76,1 | – | 185 | 22 | 145 | 52 | 90 | 2,9 | 6 | 10 | 122 | 3 | 8 | M 16 | 18 | 3,74 |
| 80 | 88,9 | – | 200 | 24 | 160 | 58 | 105 | 3,2 | 8 | 12 | 138 | 3 | 8 | M 16 | 18 | 4,75 |
| 100 | – | 108 | 235 | 24 | 190 | 65 | 128 | 3,6 | 8 | 12 | 162 | 3 | 8 | M 20 | 22 | 6,52 |
| 114,3 | – | 134 | ||||||||||||||
| 125 | – | 133 | 270 | 26 | 220 | 68 | 155 | 4 | 8 | 12 | 188 | 3 | 8 | M 24 | 26 | 9,07 |
| 139,7 | – | 162 | ||||||||||||||
| 150 | – | 159 | 300 | 28 | 250 | 75 | 182 | 4,5 | 10 | 12 | 218 | 3 | 8 | M 24 | 26 | 11,8 |
| 168,3 | – | 192 | ||||||||||||||
| (175) | 193,7 | – | 350 | 32 | 295 | 82 | 218 | 5,6 | 10 | 15 | 260 | 3 | 12 | M 27 | 30 | 18,2 |
| 200 | 219,1 | – | 375 | 34 | 320 | 88 | 244 | 6,3 | 10 | 16 | 285 | 3 | 12 | M 27 | 30 | 21,5 |
| 250 | – | 267 | 450 | 38 | 385 | 105 | 298 | 7,1 | 12 | 18 | 345 | 3 | 12 | M 30 | 33 | 34,9 |
| 273 | – | 306 | ||||||||||||||
| 300 | 323,9 | – | 515 | 42 | 450 | 115 | 362 | 8 | 12 | 18 | 410 | 4 | 16 | M 30 | 33 | 49,7 |
| 350 | 355,6 | – | 580 | 46 | 510 | 125 | 408 | 8,8 | 12 | 20 | 465 | 4 | 16 | M 33 | 36 | 68,1 |
| – | 368 | |||||||||||||||
| 400 | 406,4 | – | 660 | 50 | 585 | 135 | 462 | 11 | 12 | 20 | 535 | 4 | 16 | M 36 | 39 | 96,5 |
| – | 419 | |||||||||||||||
| (450) | 457 | – | 685 | 50 | 610 | 135 | 500 | 12,5 | 12 | 20 | 560 | 4 | 20 | M 36 | 39 | 99,7 |
| 500 | 508 | – | 755 | 52 | 670 | 140 | 562 | 14,2 | 12 | 20 | 615 | 4 | 20 | M 39 | 42 | 117 |
Khun Flanges, a leading supplier in Naypyidaw, Myanmar, offers an extensive selection of DIN 2635 PN40 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 2635 PN40 Weld Neck Flanges are primarily used in high-pressure piping systems across industries such as oil and gas, petrochemical, power generation, and chemical processing. Their robust design ensures secure, leak-proof connections between pipes, valves, and other equipment in demanding environments exposed to high pressure, temperature, and fluctuating conditions. These flanges are commonly installed in critical systems like pipelines, reactors, compressors, and pumps, where performance and reliability are paramount. Their durability and precision make them essential for maintaining system integrity and long-term operational efficiency.
Yes, we offer custom sizes for DIN 2635 PN40 Weld Neck Flanges to meet specific project needs. Our team at Khun Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@khunflanges.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.
Our team is ready to assist you. Contact us for any queries or personalized solutions.
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