Flange facing types according to DIN EN 1092-1

Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN designated - Part 1: Steel flanges

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 faces have to be smooth enough to ensure a tight, leak-free seal for bolted flanges.

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  

Flange facing types according to DIN EN 1092-1

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.

Related flange

Requirements are valid for normal case, in special case you have to contact the technical department.

Slip-On Flanges, SO Flange
Common flange types
Specialty flange
Specialty flange
150LB Carbon steel forged flange
Material Grades

Flanges specification, Standard and identification

Below you will find a short description and definition of each type, completed with an detailed image.