Germany standard flange DIN 2637 welding neck flanges; nominal pressure 100
Pipe
Flange
Neck
Raised Face
Drilling
Approx.
Weight
(7.85 kg/dm3)
kg
Nominal
Size
d1
D
b
k
h1
d3
s
r
h2
d4
f
Number
of
Holes
Bolt
Diameter
d2
ISO Series
DIN Series
10
14
100
20
70
45
28
1.8
4
6
40
2
4
M12
(1/2″)
14
1.09
17.2
32
15
20
105
20
75
45
32
2
4
6
45
2
4
M12
(1/2″)
14
1.19
21.3
34
25
30
140
24
100
58
48
2.6
4
8
65
2
4
M16
(5/8″)
18
2.66
33.7
52
32
38
155
24
110
60
58
2.6
6
8
75
2
4
M20
(3/4″)
23
3.2
42.4
62
40
44.5
170
26
125
62
65
2.9
6
10
85
3
4
M20
(3/4″)
23
4.09
48.3
70
50
57
195
28
145
68
86
3.2
6
10
95
3
4
M24
(7/8″)
27
5.98
60.3
90
65
76.1
76.1
220
30
170
76
108
3.6
6
12
120
3
8
M24
(7/8″)
27
7.91
80
88.9
88.9
230
32
180
78
120
4
8
12
130
3
8
M24
(7/8″)
27
8.95
100
108
265
36
210
90
145
5
8
12
160
3
8
M27
(1″)
30
13.7
114.3
150
125
133
315
40
250
105
180
6.3
8
12
185
3
8
M30
(1 1/8″)
33
22.7
139.7
150
159
355
44
290
115
210
7.1
10
12
215
3
12
M30
(1 1/8″)
33
30.2
168.3
168.3
-175
191
385
48
320
127
245
8.8
10
16
245
3
12
M30
(1 1/8″)
33
38.9
193.7
200
216
430
52
360
130
278
10
10
16
270
3
12
M33
(1 1/4″)
36
52.8
219.1
250
267
505
60
430
157
340
12.5
12
18
325
3
12
M36
(1 3/8″)
39
81.4
273
300
318
585
68
500
170
400
14.2
12
18
375
4
16
M39
(1 1/2″)
42
122
323.9
350
368
655
74
560
189
460
16
12
20
435
4
16
M45
(1 3/4″)
48
165
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