Dimensions & Approximate Masses DIN 2631 PN6 Flange WN
Germany standard flange DIN 2631 welding neck flanges; nominal pressure 6
Vorschweißflansche DIN 2631 Nenndruck 6
Brides à souder à collerette DIN 2631: pression nominale 6
Pipe
Flange
Neck
Raised face
Screws
Weight
(7,85 Kg/dm3)
Rated
d1
D
b
k
h1
d3
s
r
h2
d4
f
Holes
Thread
d2
Kg
Diameter
ISO Series
DIN Series
15
–
20
80
12
55
30
28
2
4
6
40
2
4
M 10
11
0,392
21,3
–
30
20
–
25
90
14
65
32
35
2,3
4
6
50
2
4
M 10
11
0,592
26,9
–
38
25
–
30
100
14
75
35
40
2,6
4
6
60
2
4
M 10
11
0,747
33,7
–
42
32
–
38
120
14
90
35
50
2,6
6
6
70
2
4
M 12
14
1,05
42,4
–
55
40
–
44,5
130
14
100
38
58
2,6
6
7
80
3
4
M 12
14
1,18
48,3
–
62
50
–
57
140
14
110
38
70
2,9
6
8
90
3
4
M 12
14
1,34
60,3
–
74
65
76,1
–
160
14
130
38
88
2,9
6
9
110
3
4
M 12
14
1,67
80
88,9
–
190
16
150
42
102
3,2
8
10
128
3
4
M 16
18
2,71
100
–
108
210
16
170
45
122
3,6
8
10
148
3
4
M 16
18
3,24
114,3
130
125
–
133
240
18
200
48
148
4
8
10
178
3
8
M 16
18
4,49
139,7
–
155
150
–
159
265
18
225
48
172
4,5
10
12
202
3
8
M 16
18
5,15
168,3
–
184
200
219,1
–
320
20
280
55
236
5,9
10
15
258
3
8
M 16
18
7,78
250
–
267
375
22
335
60
282
6,3
12
15
312
3
12
M 16
18
10,8
273
–
290
300
323,9
–
440
22
395
62
342
7,1
15
15
365
4
12
M 20
22
14
350
355,6
–
490
22
445
62
385
7,1
12
15
415
4
12
M 20
22
18,5
–
368
16,7
400
406,4
–
540
22
495
65
438
7,1
12
15
465
4
16
M 20
22
21,2
–
419
19
500
508
–
645
24
600
68
538
7,1
12
15
570
4
20
M 20
22
28,6
600
610
–
755
24
705
70
640
7,1
12
16
670
5
20
M 24
26
31,5
700
711
–
860
24
810
70
740
7,1
12
16
775
5
24
M 24
26
37,4
800
813
–
975
24
920
70
842
7,1
12
16
880
5
24
M 27
30
46,1
900
914
–
1075
26
1020
70
942
7,1
12
16
980
5
24
M 27
30
55,6
1000
1016
–
1175
26
1120
70
1045
7,1
16
16
1080
5
28
M 27
30
61,9
NOTE:
1. Facing according to DIN 2526
Flat face:
Form A, Face without any requirements
Form B, Face Rz=160, machined (not smoother than 40µm)
Raised Face:
Form C, Face Rz=160, machined (not smoother than 40µm)
Form D, Face Rz=40, machined
Form E, Face Rz=16, machined
2. Tongue and groove according to DIN 2512
Form F, Tongue
Form N, Groove
3. Male and Female according to DIN 2513, DIN 2514
Form V13, V14, Male
Form R13, R16, Female
4. Chemfering for diaphragm-weld packings, PN64-PN400, according to DIN 2695
5. Facing for lens-shaped joints, PN64-PN400, according to DIN 2696