| DN |
Outside Diameter (D) |
Diameter of Bolt Circle (K) |
Diameter of Bolt Hole (L) |
Bolting Number |
Bolting Size |
Flange Thickness (C2) |
Length (H1) |
Neck Diameters (N2) |
Corner Radius (R1) |
|---|---|---|---|---|---|---|---|---|---|
| 10 | 100 | 70 | 14 | 4 | M12 | 20 | 28 | 40 | 4 |
| 15 | 105 | 75 | 14 | 4 | M12 | 20 | 28 | 43 | 4 |
| 20 | 130 | 90 | 18 | 4 | M16 | 22 | 30 | 52 | 4 |
| 25 | 140 | 100 | 18 | 4 | M16 | 24 | 32 | 60 | 4 |
| 32 | 155 | 110 | 22 | 4 | M20 | 24 | 32 | 68 | 6 |
| 40 | 170 | 125 | 22 | 4 | M20 | 26 | 34 | 80 | 6 |
| 50 | 195 | 145 | 26 | 4 | M24 | 28 | 36 | 95 | 6 |
| 65 | 220 | 170 | 26 | 8 | M24 | 30 | 40 | 118 | 6 |
| 80 | 230 | 180 | 26 | 8 | M24 | 32 | 44 | 130 | 8 |
| 100 | 265 | 210 | 30 | 8 | M27 | 36 | 52 | 158 | 8 |
| 125 | 315 | 250 | 33 | 8 | M30 | 40 | 56 | 188 | 8 |
| 150 | 355 | 290 | 33 | 12 | M30 | 44 | 60 | 225 | 10 |
| 200 | 430 | 360 | 36 | 12 | M33 | 52 | - | - | 10 |
| 250 | 505 | 430 | 39 | 12 | M36 | 60 | - | - | 12 |
| 300 | 585 | 500 | 42 | 16 | M39 | 68 | - | - | 12 |
| 350 | 655 | 560 | 48 | 16 | M45 | 74 | - | - | 12 |
| 400b | - | - | - | - | - | - | - | - | - |
| 500b | - | - | - | - | - | - | - | - | - |
a For flanges type 21 the outside hub diameter approximately corresponds to the outside pipe diameter and the nominal value dimensions A, N3 and R1 and their tolerances are included for guidance only.
b Only mating dimensions fixed, see Annex J.
Precision Engineering. Technical Expertise. Global Supply.
