Dimension and weight of DIN2634 PN25 Welding Neck Flange
Pipe Parameter d1 Flange Dimension Neck Size Hub Size Screw Approx. Flange Weight
DN ISO DIN D b k h1 d3 s r h2 d4 f No. of d2 KG/PCS
Holes
10 – 14 90 16 60 35 25 1.8 4 6 40 2 4 14 0.67
17.2 – 90 16 60 35 28 1.8 4 6 40 2 4 14 0.66
15 – 20 95 16 65 38 30 2 4 6 45 2 4 14 0.75
21.3 – 95 16 65 38 32 2 4 6 45 2 4 14 0.75
20 – 25 105 18 75 40 38 2.3 4 6 58 2 4 14 1.07
26.9 – 105 18 75 40 40 2.3 4 6 58 2 4 14 1.07
25 – 30 115 18 85 40 42 2.6 4 6 68 2 4 14 1.29
33.7 – 115 18 85 40 46 2.6 4 6 68 2 4 14 1.28
32 – 38 140 18 100 42 52 2.6 6 6 78 2 4 18 1.88
42.4 – 140 18 100 42 56 2.6 6 6 78 2 4 18 1.86
40 – 44.5 150 18 110 45 60 2.6 6 7 88 3 4 18 2.1
48.3 – 150 18 110 45 64 2.6 6 7 88 3 4 18 2.08
50 – 57 165 20 125 48 72 2.9 6 8 102 3 4 18 2.81
60.3 – 165 20 125 48 75 2.9 6 8 102 3 4 18 2.78
65 76.1 – 185 22 145 52 90 2.9 6 10 122 3 8 18 3.61
80 88.9 – 200 24 160 58 105 3.2 8 12 138 3 8 18 4.62
100 – 106 235 24 190 65 128 3.6 8 12 162 3 8 22 6.42
114.3 – 235 24 190 65 134 3.6 8 12 162 3 8 22 6.27
125 – 133 270 26 220 68 155 4 8 12 188 3 8 26 8.83
139.7 – 270 26 220 68 162 4 8 12 188 3 8 26 8.61
150 – 159 300 28 250 75 182 4.5 10 12 218 3 8 26 11.67
166.3 – 300 28 250 75 192 4.5 10 12 218 3 8 26 11.29
175 193.7 – 330 28 280 75 218 5.6 10 15 248 3 12 26 13.11
200 219.1 – 360 30 310 80 244 6.3 10 16 278 3 12 26 16.61
250 – 267 425 32 370 88 292 7.1 12 18 335 3 12 30 23.99
273 – 425 32 370 88 298 7.1 12 18 335 3 12 30 23.48
300 323.9 – 485 34 430 92 352 8 12 18 395 4 16 30 30.74
350 355.6 – 555 38 490 100 398 8 12 20 450 4 16 33 47.2
– 368 555 38 490 100 398 8 12 20 450 4 16 33 44.22
400 406.4 – 620 40 550 110 452 8.8 12 20 505 4 16 36 61.69
– 419 620 40 550 110 452 8.8 12 20 505 4 16 36 57.88
500 508 – 730 44 660 125 558 10 12 20 615 4 20 36 89.57
600 610 – 845 46 770 125 660 11 12 20 720 5 20 39 114.96
700 711 – 960 46 875 125 760 12.5 12 20 820 5 24 42 139.5
800 813 – 1085 50 990 135 865 14.2 12 22 930 5 24 48 188.71
900 914 – 1185 54 1090 145 968 16 12 24 1030 5 28 48 231.48
1000 1016 – 1320 58 1210 155 1070 17.5 16 24 1140 5 28 56 303.52