DIN 2634
WELDING NECK FLANGE NOMINAL PRESSURE 25

Pipe Flange Neck Raised
face
Bolts Weight of
one flange
(7.85 kg/dm3)kg.
NW d1 D b k h1 d3 s r h2 d4 f No. Thread d2
175 (191) 330 28 280 75 215 5.6 10 15 248 3 12
M24 (7/8") 27 13.4
193.7 218
200 216 360 30 310 80 240 6.3 10 16 278 3 17.0
219.1 244
250 267 425 32 370 88 292 7.1 12 18 335 3
M27
(1")
30
24.4
273 298
300 318 485 34 430 92 345 8 12 18 395 4 16
323.9 352 31.2
350 355.6 555 38 490 100 398 8 12 20 450 4 M30 (1-1/8") 33
368 45.0
400 406.4 620 40 550 110 452 8.8 12 20 505 4      
419 58.7
500 508 730 44 660 125 558 10 12 20 615 4
20
M33 (1-1/4") 36
521 86.1
600 609.6 845 46 770 125 660 11 12 20 720 5 M36 (1-3/8") 39
622 101