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Dimensions of PN 400 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 17.2 28 28 28 - 65 8 48 48 4 4
15 145 100 22 4 M20 26.9 30 30 30 - 68 8 56 57 4 4
25 180 130 26 4 M24 42.4 38 38 38 - 90 10 82 81 4 5
40 220 165 30 4 M27 60.3 48 48 48 - 110 12 106 105 6 5
50 235 180 30 8 M27 76.1 52 52 52 - 120 15 120 120 6 6
65 290 225 33 8 M30 101.6 64 64 64 - 135 18 158 158 6 6
80 305 240 33 8 M30 114.3 68 68 68 - 150 20 174 174 8 8
100 370 295 39 8 M36 139.7 80 80 80 46 175 25 216 216 8 8
125 415 340 39 12 M36 193.7 92 92 92 58 200 30 258 259 8 10
150 475 390 42 12 M39 219.1 105 105 105 74 225 35 302 302 10 10
200 585 490 48 16 M45 273 130 130 130 120 280 40 388 388 10 10
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