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Dimensions of PN 250 flanges

This diagram illustrates the arrangement but not necessarily the correct number of bolt holes K D L
This diagram illustrates the arrangement but not necessarily the correct number of bolt holes
Flange type 05 C 4 G max
Flange type 05
Flange type 11 H 2 A N 1 S C 2 H 3 R 1
Flange type 11
Flange type 21 N 3 C 3 A C 3 N 3 R 1 R 1
Flange type 21

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} $ Flange thickness $ C_4 $ , in $ \mathrm{mm} $ Flange thickness $ C_2 $ , in $ \mathrm{mm} $ Flange thickness $ C_3 $ , in $ \mathrm{mm} $ Centre portion $ G_{max} $ , in $ \mathrm{mm} $ Length $ H_2 $ , in $ \mathrm{mm} $ Length $ H_3 $ , in $ \mathrm{mm} $ Neck diameters $ N_1 $ , in $ \mathrm{mm} $ Neck diameters $ N_3 $ , in $ \mathrm{mm} $ Corner radius $ R_1 $ for flange type 11, in $ \mathrm{mm} $ Corner radius $ R_1 $ for flange type 21, in $ \mathrm{mm} $
10 125 85 18 4 M16 - - - 24 - - - - 46 - 4
15 130 90 18 4 M16 21.3 26 26 26 - 60 6 48 52 4 4
25 150 105 22 4 M20 33.7 28 28 28 - 65 8 60 63 4 4
40 185 135 26 4 M24 48.3 34 34 34 - 80 10 84 90 6 4
50 200 150 26 8 M24 60.3 38 38 38 - 85 10 95 102 6 5
65 230 180 26 8 M24 76.1 42 42 42 36 95 12 124 125 6 5
80 255 200 30 8 M27 101.6 46 46 46 46 102 12 136 142 8 6
100 300 235 33 8 M30 127 54 54 54 62 120 14 164 168 8 6
125 340 275 33 12 M30 152.4 60 60 60 86 140 16 200 207 8 6
150 390 320 36 12 M33 177.8 68 68 68 109 160 18 240 246 10 8
200 485 400 42 12 M39 244.5 85 82 82 150 190 25 305 314 10 8
250 585 490 48 16 M45 298.5 104 100 100 171 215 30 385 394 12 10
300 690 590 52 16 M48 - - - 120 - - - - 480 - 10
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