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Dimensions of PN 320 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 24 24 24 - 58 6 44 46 4 4
15 130 90 18 4 M16 21.3 26 26 26 - 60 6 48 52 4 4
25 160 115 22 4 M20 33.7 34 34 34 - 78 8 68 72 4 4
40 195 145 26 4 M24 48.3 38 38 38 - 88 10 92 96 6 5
50 210 160 26 8 M24 63.5 42 42 42 - 100 10 106 110 6 5
65 255 200 30 8 M27 88.9 51 51 51 - 120 12 138 137 6 6
80 275 220 30 8 M27 101.6 55 55 55 43 130 14 156 160 8 6
100 335 265 36 8 M33 133 65 65 65 58 145 16 186 190 8 8
125 380 310 36 12 M33 168.3 75 75 75 78 175 20 230 235 8 8
150 425 350 39 12 M36 193.7 84 84 84 94 195 25 265 266 10 10
200 525 440 42 16 M39 244.5 103 103 103 140 235 30 345 350 10 10
250 640 540 52 16 M48 323.9 125 125 125 190 300 40 428 432 12 10
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