Supachok Flanges, a reputable manufacturer and supplier based in Bangkok, Thailand, specializes in top-notch DIN 2631 PN6 Weld Neck Flanges. These flanges are crafted for strength, durability, and leak-proof performance, making them perfect for low-pressure piping systems. With a long tapered hub, they ensure smooth stress distribution, which is key for safe and reliable operation. Adhering strictly to DIN standards, these flanges are the go-to choice for pipelines that need permanent, high-integrity joints. Supachok Flanges prides itself on delivering precision-engineered, cost-effective solutions that find their place in various industries, including water treatment, chemicals, marine, HVAC, and power, all while guaranteeing long service life, safety, and efficiency in critical operations.
Made from high-quality carbon steel, stainless steel, or alloy steel, DIN 2631 PN6 Weld Neck Flanges offer impressive strength, corrosion resistance, and durability for low-pressure applications. Their material composition allows them to withstand mild chemicals, seawater, and temperature changes. On the mechanical side, these flanges boast excellent tensile and yield strength, toughness, and fatigue resistance, ensuring they perform reliably. The weld neck design enhances structural integrity by minimizing stress concentration at the flange’s base. Combining mechanical stability with corrosion resistance, DIN 2631 PN6 Weld Neck Flanges are a dependable choice for low-pressure piping systems.
| 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 | 80 | 12 | 55 | 30 | 28 | 2 | 4 | 6 | 40 | 2 | 4 | M 10 | 11 | 0,392 |
| 21,3 | – | 30 | ||||||||||||||
| 20 | – | 25 | 90 | 14 | 65 | 32 | 35 | 2,3 | 4 | 6 | 50 | 2 | 4 | M 10 | 11 | 0,592 |
| 26,9 | – | 38 | ||||||||||||||
| 25 | – | 30 | 100 | 14 | 75 | 35 | 40 | 2,6 | 4 | 6 | 60 | 2 | 4 | M 10 | 11 | 0,747 |
| 33,7 | – | 42 | ||||||||||||||
| 32 | – | 38 | 120 | 14 | 90 | 35 | 50 | 2,6 | 6 | 6 | 70 | 2 | 4 | M 12 | 14 | 1,05 |
| 42,4 | – | 55 | ||||||||||||||
| 40 | – | 44,5 | 130 | 14 | 100 | 38 | 58 | 2,6 | 6 | 7 | 80 | 3 | 4 | M 12 | 14 | 1,18 |
| 48,3 | – | 62 | ||||||||||||||
| 50 | – | 57 | 140 | 14 | 110 | 38 | 70 | 2,9 | 6 | 8 | 90 | 3 | 4 | M 12 | 14 | 1,34 |
| 60,3 | – | 74 | ||||||||||||||
| 65 | 76,1 | – | 160 | 14 | 130 | 38 | 88 | 2,9 | 6 | 9 | 110 | 3 | 4 | M 12 | 14 | 1,67 |
| 80 | 88,9 | – | 190 | 16 | 150 | 42 | 102 | 3,2 | 8 | 10 | 128 | 3 | 4 | M 16 | 18 | 2,71 |
| 100 | – | 108 | 210 | 16 | 170 | 45 | 122 | 3,6 | 8 | 10 | 148 | 3 | 4 | M 16 | 18 | 3,24 |
| 114,3 | 130 | |||||||||||||||
| 125 | – | 133 | 240 | 18 | 200 | 48 | 148 | 4 | 8 | 10 | 178 | 3 | 8 | M 16 | 18 | 4,49 |
| 139,7 | – | 155 | ||||||||||||||
| 150 | – | 159 | 265 | 18 | 225 | 48 | 172 | 4,5 | 10 | 12 | 202 | 3 | 8 | M 16 | 18 | 5,15 |
| 168,3 | – | 184 | ||||||||||||||
| 200 | 219,1 | – | 320 | 20 | 280 | 55 | 236 | 5,9 | 10 | 15 | 258 | 3 | 8 | M 16 | 18 | 7,78 |
| 250 | – | 267 | 375 | 22 | 335 | 60 | 282 | 6,3 | 12 | 15 | 312 | 3 | 12 | M 16 | 18 | 10,8 |
| 273 | – | 290 | ||||||||||||||
| 300 | 323,9 | – | 440 | 22 | 395 | 62 | 342 | 7,1 | 15 | 15 | 365 | 4 | 12 | M 20 | 22 | 14 |
| 350 | 355,6 | – | 490 | 22 | 445 | 62 | 385 | 7,1 | 12 | 15 | 415 | 4 | 12 | M 20 | 22 | 18,5 |
| – | 368 | 16,7 | ||||||||||||||
| 400 | 406,4 | – | 540 | 22 | 495 | 65 | 438 | 7,1 | 12 | 15 | 465 | 4 | 16 | M 20 | 22 | 21,2 |
| – | 419 | 19 | ||||||||||||||
| 500 | 508 | – | 645 | 24 | 600 | 68 | 538 | 7,1 | 12 | 15 | 570 | 4 | 20 | M 20 | 22 | 28,6 |
| 600 | 610 | – | 755 | 24 | 705 | 70 | 640 | 7,1 | 12 | 16 | 670 | 5 | 20 | M 24 | 26 | 31,5 |
| 700 | 711 | – | 860 | 24 | 810 | 70 | 740 | 7,1 | 12 | 16 | 775 | 5 | 24 | M 24 | 26 | 37,4 |
| 800 | 813 | – | 975 | 24 | 920 | 70 | 842 | 7,1 | 12 | 16 | 880 | 5 | 24 | M 27 | 30 | 46,1 |
| 900 | 914 | – | 1075 | 26 | 1020 | 70 | 942 | 7,1 | 12 | 16 | 980 | 5 | 24 | M 27 | 30 | 55,6 |
| 1000 | 1016 | – | 1175 | 26 | 1120 | 70 | 1045 | 7,1 | 16 | 16 | 1080 | 5 | 28 | M 27 | 30 | 61,9 |
Supachok Flanges, a leading supplier in Bangkok, Thailand, offers an extensive selection of DIN 2631 PN6 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.
These flanges are widely utilized in low-pressure piping systems where strong, permanent, and leak-proof connections are essential. You’ll often find them in water supply and wastewater treatment plants, as well as in chemical and petrochemical processing and HVAC systems. The marine industry also makes use of them in non-critical seawater pipelines and auxiliary systems. Power generation facilities rely on them for low-pressure cooling water lines and auxiliary circuits. Thanks to their robust weld neck design, corrosion resistance, and long service life, DIN 2631 PN6 Weld Neck Flanges ensure efficient, safe, and cost-effective operations.
Yes, we offer custom sizes for DIN 2631 PN6 Weld Neck Flanges to meet specific project needs. Our team at Supachok Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@supachokflanges.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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