Dimensions of PN 25 flanges
DN | Outside diameter $ D $ , in $ \mathrm{mm} $ | Diameter of bolt circle $ K $ , in $ \mathrm{mm} $ | Diameter of bolt hole $ L $ , in $ \mathrm{mm} $ | Number of bolts | Bolts size | Outside diameter of neck $ A $ , in $ \mathrm{mm} $ | Bore diameters $ B_1 $ , in $ \mathrm{mm} $ | Bore diameters $ B_2 $ , in $ \mathrm{mm} $ | Bore diameters $ B_3 $ , in $ \mathrm{mm} $ | Flange thickness $ C_1 $ , in $ \mathrm{mm} $ | Flange thickness $ C_2 $ , in $ \mathrm{mm} $ | Flange thickness $ C_3 $ , in $ \mathrm{mm} $ | Flange thickness $ C_4 $ , in $ \mathrm{mm} $ | Chamfer $ E $ , in $ \mathrm{mm} $ | Collar thickness $ F_1 $ , in $ \mathrm{mm} $ | Collar thickness $ F_2 $ , in $ \mathrm{mm} $ | Centre portion $ G_{max} $ , in $ \mathrm{mm} $ | Length $ H_1 $ , in $ \mathrm{mm} $ | Length $ H_2 $ , in $ \mathrm{mm} $ | Length $ H_3 $ , in $ \mathrm{mm} $ | Length $ H_4 $ , in $ \mathrm{mm} $ | Neck diameters $ N_1 $ , in $ \mathrm{mm} $ | Neck diameters $ N_2 $ , in $ \mathrm{mm} $ | Neck diameters $ N_3 $ , in $ \mathrm{mm} $ | Corner radius $ R_1 $ , in $ \mathrm{mm} $ |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
10 | 90 | 60 | 14 | 4 | M12 | 17.2 | 18 | 21 | 31 | 14 | 16 | 16 | 16 | 3 | 12 | 5 | - | 22 | 35 | 6 | 35 | 28 | 30 | 28 | 4 |
15 | 95 | 65 | 14 | 4 | M12 | 21.3 | 22 | 25 | 35 | 14 | 16 | 16 | 16 | 3 | 12 | 5 | - | 22 | 38 | 6 | 38 | 32 | 35 | 32 | 4 |
20 | 105 | 75 | 14 | 4 | M12 | 26.9 | 27.5 | 31 | 42 | 16 | 18 | 18 | 18 | 4 | 14 | 6 | - | 26 | 40 | 6 | 40 | 40 | 45 | 40 | 4 |
25 | 115 | 85 | 14 | 4 | M12 | 33.7 | 34.5 | 38 | 49 | 16 | 18 | 18 | 18 | 4 | 14 | 7 | - | 28 | 40 | 6 | 40 | 46 | 52 | 50 | 4 |
32 | 140 | 100 | 18 | 4 | M16 | 42.4 | 43.5 | 47 | 59 | 18 | 18 | 18 | 18 | 5 | 14 | 8 | - | 30 | 42 | 6 | 42 | 56 | 60 | 60 | 6 |
40 | 150 | 110 | 18 | 4 | M16 | 48.3 | 49.5 | 53 | 67 | 18 | 18 | 18 | 18 | 5 | 14 | 8 | - | 32 | 45 | 7 | 45 | 64 | 70 | 70 | 6 |
50 | 165 | 125 | 18 | 4 | M16 | 60.3 | 61.5 | 65 | 77 | 20 | 20 | 20 | 20 | 5 | 16 | 10 | - | 34 | 48 | 8 | 48 | 75 | 84 | 84 | 6 |
65 | 185 | 145 | 18 | 8 | M16 | 76.1 | 77.5 | 81 | 96 | 22 | 22 | 22 | 22 | 6 | 16 | 11 | 55 | 38 | 52 | 10 | 52 | 90 | 104 | 104 | 6 |
80 | 200 | 160 | 18 | 8 | M16 | 88.9 | 90.5 | 94 | 114 | 24 | 24 | 24 | 24 | 6 | 18 | 12 | 70 | 40 | 58 | 12 | 58 | 105 | 118 | 120 | 8 |
100 | 235 | 190 | 22 | 8 | M20 | 114.3 | 116 | 120 | 138 | 26 | 24 | 24 | 24 | 6 | 20 | 14 | 90 | 44 | 65 | 12 | 65 | 134 | 145 | 142 | 8 |
125 | 270 | 220 | 26 | 8 | M24 | 139.7 | 141.5 | 145 | 166 | 28 | 26 | 26 | 26 | 6 | 22 | 16 | 115 | 48 | 68 | 12 | 68 | 162 | 170 | 162 | 8 |
150 | 300 | 250 | 26 | 8 | M24 | 168.3 | 170.5 | 174 | 194 | 30 | 28 | 28 | 28 | 6 | 24 | 18 | 140 | 52 | 75 | 12 | 75 | 192 | 200 | 192 | 10 |
200 | 360 | 310 | 26 | 12 | M24 | 219.1 | 221.5 | 226 | 250 | 32 | 30 | 30 | 30 | 6 | 26 | 18 | 190 | 52 | 80 | 16 | 80 | 244 | 256 | 252 | 10 |
250 | 425 | 370 | 30 | 12 | M27 | 273 | 276.5 | 281 | 302 | 35 | 32 | 32 | 32 | 8 | 26 | 18 | 235 | 60 | 88 | 18 | 88 | 298 | 310 | 304 | 12 |
300 | 485 | 430 | 30 | 16 | M27 | 323.9 | 327.5 | 333 | 356 | 38 | 34 | 34 | 34 | 8 | 28 | 20 | 285 | 67 | 92 | 18 | 92 | 352 | 364 | 364 | 12 |
350 | 555 | 490 | 33 | 16 | M30 | 355.6 | 359.5 | 365 | 408 | 42 | 38 | 38 | 38 | 8 | 32 | 22 | 332 | 72 | 100 | 20 | 100 | 398 | 418 | 418 | 12 |
400 | 620 | 550 | 36 | 16 | M33 | 406.4 | 411 | 416 | 462 | 48 | 40 | 40 | 40 | 8 | 34 | 24 | 380 | 78 | 110 | 20 | 110 | 452 | 472 | 472 | 12 |
450 | 670 | 600 | 36 | 20 | M33 | 457 | 462 | 467 | 510 | 54 | 46 | 46 | 50 | 8 | 36 | 26 | 425 | 84 | 110 | 20 | 110 | 500 | 520 | 520 | 12 |
500 | 730 | 660 | 36 | 20 | M33 | 508 | 513.5 | 519 | 568 | 58 | 48 | 48 | 51 | 8 | 38 | 28 | 475 | 90 | 125 | 20 | 125 | 558 | 580 | 580 | 12 |
600 | 845 | 770 | 39 | 20 | M36 | 610 | 616.5 | 622 | 670 | 68 | 48 | 58 | 66 | 8 | 40 | 30 | 575 | 100 | 125 | 20 | 125 | 660 | 684 | 684 | 12 |
700 | 960 | 875 | 42 | 24 | M39 | 711 | - | 721 | - | 85 | 50 | - | - | 8 | - | 30 | - | - | 129 | 20 | 125 | 760 | - | 780 | 12 |
800 | 1085 | 990 | 48 | 24 | M45 | 813 | - | 824 | - | 95 | 53 | - | - | 8 | - | 35 | - | - | 138 | 22 | 135 | 864 | - | 882 | 12 |
900 | 1185 | 1090 | 48 | 28 | M45 | 914 | - | - | - | - | 57 | - | - | - | - | - | - | - | 148 | 24 | - | 968 | - | 982 | 12 |
1000 | 1320 | 1210 | 56 | 28 | M52 | 1016 | - | - | - | - | 63 | - | - | - | - | - | - | - | 160 | 24 | - | 1070 | - | 1086 | 16 |
1200 | 1530 | 1420 | 56 | 32 | M52 | 1219 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
1400 | 1755 | 1640 | 62 | 36 | M56 | 1422 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
1600 | 1975 | 1860 | 62 | 40 | M56 | 1626 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
1800 | 2195 | 2070 | 70 | 44 | M64 | 1829 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
2000 | 2425 | 2300 | 70 | 48 | M64 | 2032 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |