DIN 2633
WELDING NECK FLANGES NOMINAL PRESSURE 16

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
10 14 90 14 60 35 25 1.8 4 6 40 2 4 M12 (1/2") 14 0.580
17.2 28
15 20 95 14 65 35 30 2 4 6 45 2 0.648
21.3 32
20 25 105 16 85 38 42 2.3 4 6 58 2 0.952
26.9 45
25 30 115 16 85 38 42 2.6 4 6 68 2 1.14
33.7 45
32 38 140 16 100 40 52 2.6 4 6 78 2
M16
(5/8")
18
 1.69
42.4 56
40 44.5 150 16 100 40 60 2.6 6 6 88 3 1.86
48.3 64
50 57 165 18 125 45 72 2.9 6 8 102 3 2.53
60.3 75
65 76.1 185 18 145 45 90 2.9 6 10 122 3 306
80 88.9 200 20 160 50 105 3.2 8 10 138 3 4/8 3.70
100 108 220 20 180 52 125 3.6 8 12 158 3
8
 4.62
114.3 131
125 133 250 22 210 55 150 4 8 12 188 3 6.30
139.7 156
150 159 285 22 240 55 150 4 8 12 188 3 M20 (3/4") 23 7.75
168.3 156
175 191 315 24 270 60 208 5.4 10 12 242 3 8
M20
(3/4")
23
 10.0
193.7 210
200 216 340 24 295 62 232 5.9 10 16 268 3
12
219.1 235 11.0
250 267 405 26 355 70 285 6.3 12 16 320 3
M24
(7/8")
27
 15.6
273 292
300 318 460 28 410 78 388 7.1 12 16 378 4 22.0
323.9 344
350 355.6 520 30 470 82 390 8 12 16 438 4 16
368 28.7
400 406.4 580 32 525 85 445 8 12 16 490 4 M27 (1") 30
419 36.3
500 508 715 34 650 90 548 8 12 16 610 4 20 M30 (1-1/8") 33
521 59.3
600 609.6 840 36 770 95 652 8.8 12 18 725 5 M33 (1-1/4") 36
622 73.4
700 711.2 910 36 840 100 755 8.8 12 18 795 5
24
      
720 75.0
800 812.8 1025 38 950 105 855 10 12 20 900 5 M36 (1-3/8") 39
820 99.0
900 914.4 1125 40 1050 110 955 10 12 20 1000 5 28      
920 119
1000 1016 1255 42 1170 120 1058 10 16 22 1115 5   M39 (1-1/2") 42
1020 159