This European standard specifies requirements for circular steel flanges in PN designations PN 2,5 to PN 400 and nominal sizes from DN 10 to DN 4000.
This standard specifies the flange types and their facings, dimensions, tolerances, threading, bolt sizes, flange face surface finish, marking,
materials, pressure/ temperature ratings and flange masses.
Flange facing types according to DIN EN 1092-1
Type A: flat face |
Type D: groove face |
Type G: O Ring recess |
Type B: raised face |
Type E: spigot |
Type H: O Ring groove |
Type C: tongue face |
Type F: recess |
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Flange facing dimensions
units [mm]
DN |
PN |
f1 |
f2 |
f3 |
f4 |
w |
x |
y |
z |
α |
R |
2.5 |
6 |
10 |
16 |
25 |
40 |
63 |
100 |
160 |
250 |
320 |
400 |
d1 |
10 | 35 | 35 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 2 | 4.5 | 4 | 2 | 24 | 34 | 35 | 23 | - | 2.5 |
15 | 40 | 40 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 29 | 39 | 40 | 28 | - |
20 | 50 | 50 | 58 | 58 | 58 | 58 | 58 | 58 | 58 | 58 | 58 | 58 | 36 | 50 | 51 | 35 | 41º |
25 | 60 | 60 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 68 | 43 | 57 | 58 | 42 |
32 | 70 | 70 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 51 | 65 | 66 | 50 |
40 | 80 | 80 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 3 | 61 | 75 | 76 | 60 |
50 | 90 | 90 | 102 | 102 | 102 | 102 | 102 | 102 | 102 | 102 | 102 | 102 | 73 | 87 | 88 | 72 |
65 | 110 | 110 | 122 | 122 | 122 | 122 | 122 | 122 | 122 | 122 | 122 | 122 | 95 | 109 | 110 | 94 |
80 | 128 | 128 | 138 | 138 | 138 | 138 | 138 | 138 | 138 | 138 | 138 | 138 | 106 | 120 | 121 | 105 |
100 | 148 | 148 | 158 | 158 | 162 | 162 | 162 | 162 | 162 | 162 | 162 | 162 | 5 | 4.5 | 2.5 | 129 | 149 | 150 | 128 | 32º | 3 |
125 | 178 | 178 | 188 | 188 | 188 | 188 | 188 | 188 | 188 | 188 | 188 | 188 | 155 | 175 | 176 | 154 |
150 | 202 | 202 | 212 | 212 | 218 | 218 | 218 | 218 | 218 | 218 | 218 | 218 | 183 | 203 | 204 | 182 |
200 | 258 | 258 | 268 | 268 | 278 | 285 | 285 | 285 | 285 | 285 | 285 | 285 | 239 | 259 | 260 | 238 |
250 | 312 | 312 | 320 | 320 | 335 | 345 | 345 | 345 | 345 | 345 | 345 | - | 292 | 312 | 313 | 291 |
300 | 365 | 365 | 370 | 378 | 395 | 410 | 410 | 410 | 410 | - | - | - | 4 | 343 | 363 | 364 | 342 |
350 | 415 | 415 | 430 | 438 | 450 | 465 | 465 | 465 | - | - | - | - | 5.5 | 5 | 3 | 395 | 421 | 422 | 394 | 27º | 3.5 |
400 | 465 | 465 | 482 | 490 | 505 | 535 | 535 | 535 | - | - | - | - | 447 | 473 | 474 | 446 |
450 | 520 | 520 | 532 | 550 | 555 | 560 | 560 | 560 | - | - | - | - | 497 | 523 | 524 | 496 |
500 | 570 | 570 | 585 | 610 | 615 | 615 | 615 | 615 | - | - | - | - | 349 | 375 | 376 | 548 |
600 | 670 | 670 | 685 | 725 | 720 | 735 | 735 | - | - | - | - | - | 5 | 649 | 675 | 676 | 648 |
700 | 775 | 775 | 800 | 795 | 820 | 840 | 840 | - | - | - | - | - | 751 | 777 | 778 | 750 |
800 | 880 | 880 | 905 | 900 | 930 | 960 | 960 | - | - | - | - | - | 856 | 882 | 883 | 855 |
900 | 980 | 980 | 1005 | 1000 | 1030 | 1070 | 1070 | - | - | - | - | - | 961 | 987 | 988 | 960 |
1000 | 1080 | 1080 | 1110 | 115 | 1140 | 1180 | 1180 | - | - | - | - | - | 6.5 | 6 | 4 | 1062 | 1092 | 1094 | 1060 | 28º | 4 |
1200 | 1280 | 1295 | 1330 | 1330 | 1350 | 1380 | 1380 | - | - | - | - | - | 1262 | 1292 | 1294 | 1260 |
1400 | 1480 | 1510 | 1535 | 1530 | 1560 | 1600 | - | - | - | - | - | - | 1462 | 1492 | 1494 | 1460 |
1600 | 1690 | 1710 | 1760 | 1750 | 1780 | 1815 | - | - | - | - | - | - | 1662 | 1692 | 1694 | 1660 |
1800 | 1890 | 1920 | 1960 | 1950 | 1985 | - | - | - | - | - | - | - | 1862 | 1892 | 1894 | 1860 |
2000 | 2090 | 2125 | 2170 | 2150 | - | - | - | - | - | - | - | - | 2062 | 2092 | 2094 | 2060 |
2200 | 2295 | 2335 | 2370 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
2400 | 2495 | 2545 | 2570 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
2600 | 2695 | 2750 | 2780 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
2800 | 2910 | 2960 | 2000 | - | - | - | - | - | - | - | - | - | - | - | | - | - | - | - | - | - |
3000 | 3110 | 3160 | 3210 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
3200 | 3310 | 3370 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
3400 | 3510 | 3580 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
3600 | 3720 | 3790 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
3800 | 3920 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
4000 | 4120 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Flange facing types C, D, E, F, G and H are not used for PN 2,5 and PN 6.
Flange facing types G and H are only used for PN 10 to PN 40.
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