Germany standard flange DIN 2636 welding neck flanges; nominal pressure 64
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
10~40＊
Refer to DN10~40 of DIN 2637
50
57
180
26
135
62
78
2.9
6
10
95
3
4
M20
(3/4″)
23
4.55
60.3*)
82
65
76.1*)
205
26
160
68
98
3.2
6
12
120
3
8
M20
(3/4″)
23
5.73
80
88.9*)
215
28
170
72
112
3.6
8
12
130
3
8
M20
(3/4″)
23
6.69
100
108
250
30
200
78
132
4
8
12
160
3
8
M24
(7/8″)
27
9.66
114.3*)
138
125
133
295
34
240
88
162
4.5
8
12
185
3
8
M27
(1″)
30
15.1
139.7*)
168
150
159
345
36
280
95
192
5.6
10
12
215
3
8
M30
(1 1/8″)
33
21.9
168.3*)
202
-175
-191
375
40
310
105
225
6.3
10
16
245
3
12
M30
(1 1/8″)
33
23.7
193.7*)
228
200
216
415
42
340
110
252
7.1
10
16
270
3
12
M33
(1 1/4″)
36
34.9
219.1*)
256
250
267
470
46
400
125
310
8.8
12
18
325
3
12
M33
(1 1/4″)
36
49.6
273*)
316
300
318
530
52
460
140
365
11
12
18
375
4
16
M33
(1 1/4″)
36
68.7
323.9*)
372
350
368
600
56
525
150
420
12.5
12
20
435
4
16
M36
(1 3/8″)
39
94.6
355.6*)
400
419
670
60
585
160
475
14.2
12
20
485
4
16
M39
(1 1/2″)
42
124
406.4*)
Notes: Refer to DIN 2637 for nominal size 10-40.
Comments