The main form of connection size
DN | 100 | 125 | 140 | 150 | 180 | 200 | 210 | 220 | 250 | 280 | 300 | 350 |
D | 196 | 221 | 236 | 246 | 276 | 296 | 306 | 316 | 346 | 376 | 396 | 446 |
D1 | 156 | 181 | 196 | 206 | 236 | 256 | 266 | 276 | 306 | 336 | 356 | 406 |
N-φd | 8-φ10 | 8-φ10 | 8-φ10 | 8-φ12 | 8-φ12 | 8-φ10 | 8-φ12 | 8-φ12 | 12-φ14 | 12-φ14 | 12-φ14 | 12-φ14 |
L | 280 | 300 | 320 | 330 | 360 | 380 | 390 | 400 | 430 | 460 | 480 | 590 |
b | 6 | 8 |