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Flanges Dimensions
 
150 LB. FLANGES
300 LB. FLANGES
600 LB. FLANGES
900 LB. FLANGES
Normal
pipe
size
Outside
dia. of
flange
Minimum
thickness of
flange
Overall Length Bolt
Circle
No. and 
Size of 
Holes
O.D. of
raised
face
Welding neck Slip-on

socket 
welding
Lap Joint
O Q Y Diam. No. dia. R
1/2 121 22.3 60.3 31.8 31.8 82.5 4 22 35
3/4 130 25.4 69.8 34.9 34.9 89.0 4 22 43
1 149 28.6 78.0 41.3 41.3 101.5 4 25 51
1-1/4 159 28.6 78.0 41.3 41.3 111.0 4 25 64
1-1/2 178 31.8 82.6 44.4 44.4 124.0 4 29 78
2 216 38.1 101.6 57.2 57.2 165.0 8 25 92
2-1/2 244 41.3 104.8 63.5 63.5 190.5 8 29 105
8 241 38.1 101.6 54.0 54.0 190.5 8 25 127
3-1/2
4 292 44.5 114.3 69.8 69.8 235.0 8 32 157
5 349 50.8 127.0 79.4 79.4 279.5 8 35 186
6 381 55.6 189.7 85.7 85.7 317.5 12 32 216
8 470 68.5 161.9 101.8 114.3 393.5 12 38 270
10 546 69.9 184.2 108.0 127.0 470.0 16 38 324
12 610 79.4 200.0 117.5 142.9 533.5 20 38 381
14 584 54.0 142.9 76.2 111.1 514.5 20 32 413
16 711 60.4 158.8 88.9 130.2 628.5 24 35 533
20 775 63.5 161.9 95.2 139.7 686.0 24 35 584
24 914 69.9 168.3 106.4 152.4 843.0 24 41 692
1500 LB. FLANGES
2500 LB. FLANGES
Normal
pipe
size
Outside
dia. of
flange
Minimum
thickness
of flange
Overall          Length Bolt
Circle
No. and
Size of
Holes
O.D. of
raised
face
Welding
neck
Slip-on
&
socket
welding
Lap
Joint
O Q Y Diam. No. dia. R
1/2 133.4 30.2 73.0 39.7 39.7 88.9 4 22 34.9
3/4 139.7 31.8 79.4 42.9 42.9 95.3 4 22 42.9
1 158.8 34.9 88.9 47.6 47.6 108.0 4 25 50.8
1-1/4 184.2 38.1 95.3 52.4 52.4 130.2 4 29 63.5
1-1/2 203.2 44.5 111.1 60.3 60.3 146.0 4 32 73.0
2 235.0 50.8 127.0 69.9 69.9 171.5 8 29 92.1
2-1/2 266.7 57.2 142.9 79.4 79.4 196.9 8 32 104.8
3 304.8 66.7 168.3 92.1 92.1 228.6 8 35 127.0
3-1/2
4 355.6 76.2 190.5 108.0 108.0 273.0 8 41 157.2
5 419.1 92.1 228.6 130.2 130.2 323.9 8 48 185.7
6 482.6 108.0 273.1 152.4 152.4 268.3 8 54 215.9
8 552.5 127.0 317.5 177.8 177.8 438.2 12 54 269.9
10 673.1 165.1 419.1 228.6 228.6 539.8 12 67 323.9
12 762.0 184.2 463.6 254.0 254.0 619.1 12 73 381.03
14 --- --- --- --- --- --- -- --- ---
16 --- --- --- --- --- --- -- --- ---
18 --- --- --- --- --- --- -- --- --
20 --- --- --- --- --- --- -- --- --
24 --- --- --- --- --- --- -- --- --
WELDING NECK FLANGE BORES
Nom.
pipe
Size
Outside
Diam
Light
Wall
6
Sched.
20
Sched.
30
Std.
Wall
Sched.
40
Sched.
60
Extra
Strong
Sched.
80
Sched.
100
Sched.
120
Sched.
140
Sched.
160
1/2
3/4
1
0.840
1.050
1.315
.674
.884
1.097
.....
.....
....
.....
.....
....
0.622
0.824
1.049
0.622
0.824
1.049
.....
.....
....
0.546
0.742
0.957
0.546
0.742
0.957
.....
.....
....
.....
.....
....
.....
.....
....
0.464
0.612
0.815
1-1/4
1-1/2
2
1.660
1.900
2.375
1.442
1.682
2.157
.....
.....
....
.....
.....
....
1.380
1.610
2.067
1.380
1.610
2.067
.....
.....
....
1.278
1.500
1.939
1.278
1.500
1.939
.....
.....
....
.....
.....
....
.....
.....
....
1.160
1.338
1.687
2-1/2
3
3-1/2
2.875
3.500
4.000
2.635
3.260
3.760
.....
.....
....
.....
.....
....
2.469
3.068
3.548
2.469
3.068
3.548
.....
.....
....
2.323
2.900
3.364
2.323
2.900
3.364
.....
.....
....
....
....
....
.....
.....
....
2.125
2.624
....
4
5
6
8
4.500
5.563
6.625
8.625
4.260
5.295
6.357
8.329
...
...
...
8.125
...
...
...
8.071
4.026
5.047
6.065
7.981
4.026
5.047
6.065
7.981
...
....
...
7.813
3.826
4.813
5.761
7.625
3.826
4.813
5.761
7.625
...
...
...
7.437
3.624
4.563
5.501
7.187
...
...
...
7.001
3.438
4.313
5.187
6.813
10
12
14
16
10.750
12.750
14.000
16.000
10.420
12.390
13.500
15.500
10.250
12.250
13.376
15.376
10.136
12.090
13.250
15.250
10.020
12.000
13.250
15.250
10.020
11.938
13.124
15.000
9.750
11.626
12.812
14.688
9.750
11.750
13.000
15.000
9.562
11.374
12.500
14.312
9.312
11.062
12.124
13.938
0.062
10.750
11.814
13.564
8.750
10.500
11.500
13.124
8.500
10.500
11.500
13.124

18
20
24

18.000
20.000
24.000
17.500
19.500
23.500
17.376
19.250
23.250
17.124
19.000
22.876
17.250
19.250
23.250
16.876
18.812
22.624
16.500
18.376
22.062
17.000
19.000
23.000
16.124
17.938
21.562
15.688
17.438
20.938
15.250
17.000
20.376
14.876
16.500
19.876
14.438
16.062
19.312
30
36
42
30.000
36.000
42.000
29.376
35.376
......
29.000
35.000
28.750
34.750
29.250
35.250
41.250
....
34.500
....
....
.....
....
29.000
35.000
41.000
....
.....
....
....
.....
....
....
.....
....
....
.....
....
....
.....
....
DIN 2527

NW
D Flange k Raised Face Number Bolts Bolts Dia. of 
Bolt
Hole
Weight of
One Flange
(7.85 kg/dm3)
b d4 f d2 Type-B
kg
Type-C
kg
ND-6 10
15
20
75
80
90
12
12
14
50
55
65
35
40
50
2
2
2
4
4
4
M10
M10
M10
-
-
-
11.5
11.5
11.5
0.38
0.44
0.65
0.33
0.38
0.59
25
32
40
100
120
130
14
14
14
75
90
100
60
70
80
2
2
3
4
4
4
M10
M12
M12
-
(1/2")
(1/2")
11.5
14.0
14.0
0.82
1.17
1.39
0.74
1.07
1.21
50
65
80
140
160
190
14
14
16
110
130
150
90
110
128
3
3
3
4
4
4
M12
M12
M16
(1/2")
(1/2")
(3/8")
14
14
18
1.62
2.44
3.43
1.43
2.21
3.09
100
125
150
210
240
265
16
18
18
170
200
225
148
178
202
3
3
3
4
8
8
M16
M16
M16
(5/8")
(5/8")
(5/8")
18
18
18
4.76
6.11
7.51
4.37
5.68
7.02
(175)
200
250
295
320
375
20
20
22
255
280
335
232
258
312
3
3
3
8
8
12
M16
M16
M16
(5/8")
(5/8")
(5/8")
18
18
18
10.4
12.3
18.3
9.85
11.7
17.6
300
350
400
500
440
490
540
645
22
22
22
24
395
445
495
600
365
415
465
570
4
4
4
4
12
12
16
20
M20
M20
M20
M20
(3/4")
(3/4")
(3/4")
(3/4")
23
23
23
23
25.3
31.6
38.4
60.4
24.0
30.1
36.4
58.1
ND-10
(Note from 10 mm to 175 mm see ND-16
200
250
300
340
395
445
24
26
26
295
350
400
268
320
370
3
3
4
8
12
12
M20
M20
M20
(3/4")
(3/4")
(3/4")
23
23
23
16.5
24.0
30.9
15.6
23.1
29.4
350
400
500
505
565
670
26
26
28
460
515
620
430
482
585
4
4
4
16
16
20
M20
M24
M24
(3/4")
(3/4")
(3/4")
23
27
27
40.6
49.4
75.0
38.0
47.5
72.7
ND-16
Note : For DIN 2527 ND-10-4 Holes
10
15
20
90
95
105
14
14
16
60
65
75
40
45
58
2
2
2
4
4
4
M12
M12
M12
(1/2")
(1/2")
(1/2")
14
14
14
0.63
0.72
1.01
0.56
0.64
0.93
25
32
40
115
140
150
14
14
16
60
65
75
40
45
58
2
2
2
4
4
4
M12
M16
M16
(1/2")
(5/8")
(5/8")
14
18
18
1.23
1.80
2.09
1.13
1.66
1.85
50
65
80
165
185
200
18
18
20
125
145
160
102
122
138
3
3
3
4
4
4/8
M16
M16
M16
(5/8")
(5/8")
(5/8")
18
18
18
2.88
3.66
4.77
2.59
3.33
4.34
100
125
150
220
250
285
20
22
22
180
210
240
158
188
212
3
3
3
8
8
8
M16
M16
M16
(5/8")
(5/8")
(5/8")
18
18
18
2.88
3.66
4.77
2.59
3.33
4.34
100
125
150
220
250
285
20
22
22
180
210
240
158
188
212
3
3
3
8
8
8
M16
M16
M20
(5/8")
(5/8")
(3/4")
18
18
23
5.65
8.42
10.4
5.26
7.67
9.85
(175)
200
250
315
340
405
24
24
26
270
295
355
242
268
320
3
3
3
8
12
12
M20
M20
M20
(3/4") 
(3/4") 
(7/8")
23
23
27
14.0
16.1
24.9
13.5
15.6
23.9
300
350
400
460
520
580
28
30
32
410
470
525
378
438
490
4
4
4
12
16
16
M24
M24
M27
(7/8")
(7/8")
(1")
27
27
30
35.1
47.8
63.5
33.6
46.2
61.5
500 715 34 650 610 4 20 M30 (1-1/8") 33 102 99.5
ND-25
Note: From 10mm to 150 mm
see ND-40
(175)
200
250
330
360
425
28
30
32
280
310
370
248
278
335
3
3
3
12
12
12
M24
M24
M24
(7/8")
(7/8")
(1")
27
27
30
17.3
22.3
33.5
16.5
21.5
32.5
300
350
400
485
555
620
34
38
40
430
490
550
395
450
505
4
4
4
16
16
16
M27
M30
M33
(1")
(1-1/8")
(1- 1/4")
30
33
36
46.3
68.0
89.7
44.7
65.9
87.0
500 730 44 660 615 4 20 M33 (1-1/4") 36 138 134
ND-40 10
15
20
90
95
105
16
16
16
60
65
75
40
45
58
2
2
2
4
4
4

M12
M12
M12

(1/2")
(1/2")
(1/2")
14
14
14
0.72
0.81
1.24
0.62
0.74
1.05
25
32
40
115
140
150
18
18
18
85
100
110
68
78
88
2
2
2
4
4
4
M12
M12
M12
(1/2")
(5/8")
(5/8")
14
18
18
1.38
2.03
2.35
1.31
1.82
2.11
50
65
80
165
185
200
20
22
24
125
145
160
102
122
138
3
3
3
4
8
8
M16
M16
M16
(5/8") 
(5/8") 
(5/8")
18
18
18
3.20
4.29
5.88
2.91
4.13
5.21
100
125
150
235
270
300
24
26
28
190
220
250
162
188
218
3
3
3
8
8
8
M20
M24
M24
(3/4")
(7/8") 
(7/8")
23
27
27
7.54
10.8
14.5
7.08
10.4
13.9
175
200
250
350
375
450
32
34
38
295
320
385
260
285
345
3
3
3
12
12
12
M27
M27
M27
(1")
(1")
(1-1/8")
30
30
30
22.1
27.2
43.8
21.3
26.2
43.1
300
350
400
515
580
660
42
46
50
450
510
585
410
465
535
4
4
4
16
16
16
M30
M33
M36
(1-1/8")
(1-1/8")
(1-1/8")
33
36
39
63.3
89.5
127
62.2
87.2
124
500 755 52 670 615 4 20 M39 (1-1/2") 42 172 168
DIN 2576 
FLANGES, SLIP-ON TYPE FOR BRITISH OR WELDING NOMINAL PRESSURE 10
Pipe Flange
Bolts Weight of
one flange
7.85 kg/
dm3) kg
NW d1 ds D b1 k Number Thread d2
10 14
17.2)
14.5
17.7
90 14 60 4 M12 (1/2") 14 0.613
0.605
15 20
21.3)
20.5
21.8
95 14 65 4 M12 (1/2") 14 0675
0.669
20 25
26.9)
25.5
27.4
105 16 75 4 M12 (1/2") 14 0.947
0.936
25 30
33.7)
30.5
34.2
115 16 85 4 M12 (1/2") 14 1.14
1.11
32 38
42.4)
38.5
42.9
140 16 100 4 M16 (5/8") 18 1.66
1.62
40 44.5
48.3)
45
48.8
150 16 110 4 M16 (5/8") 18 1.89
1.86
50 57
60.3)
57.5
60.8
165 18 125 4 M16 (5/8") 18 2.51
2.47
65 76.1) 76.6 185 18 145 4 M16 (5/8") 18 3.00
80 88.9) 89.4 200 20 160 4 M16 (5/8") 18 3.79
100 108
114.3)
108.5
114.8
220 20 180 8 M16 (5/8") 18 4.20
4.03
125 133
139.7)
133.5
140.2
250 22 210 8 M16 (5/8") 18 5.71
5.46
150 159
168.3)
159.5
168.8
285 22 210 8 M16 (3/4") 23 6.72
6.57
175 191
193.7)
192
194.7
315 24 270 8 M20 (3/4") 23 8.60
8.45
200 216
219.1)
216
220.1
340 24 295 8 M20 (3/4") 23 9.50
9.31
250 267
273)
268
274
395 26 350 12 M20 (3/4") 23 12.5
11.9
400 406.4
419
407.4
420
565 32 515 16 M24 (7/8") 27 27.9
25.9
500 508)
521
509
522
670 38 620 20 M24 (7/8") 27 37.9
41.1
DIN 2632
WELDING NECK FLANGES FOR NOMINAL PRESSURE 10
Pipe Flange Neck Raised
face
Bolts
Weight of
one flange
7.85 kg/dm3)
kg
NW d1 D b k h1 d3 s f h2 d4 f No. Thread d2
200 216 340 24 295 62 232 5.9 10 16 268 3 8 M20 (3/4") 23 11.3
219.1 235
250 267 395 26 350 68 285 6.3 12 16 320 3 12 14.7
273 295
300 318 445 26 400 68 335 7.1 12 16 370 4 17.6
323.9 344
350 355.6 505 26 460 68 385 7.1 12 16 430 4 16 M24 (3/8") 27
368 21.4
400 406.4 565 26 515 72 440 7.1 12 16 482 4
419 26.1
500 508 670 28 620 75 542 7.1 12 16 585 4 20
521 34.7
600 609.6 780 28 725 80 642 7.1 12 18 685 5 M27 (1") 30
622 42.2
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
DIN 2634
WELDING NECK FLANGE NOMINAL PRESSURE 25
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
175 (191) 330 28 280 75 215 5.6 10 15 248 3 12
M24 (7/8") 27 13.4
193.7 218
200 216 360 30 310 80 240 6.3 10 16 278 3 17.0
219.1 244
250 267 425 32 370 88 292 7.1 12 18 335 3
M27
(1")
30
24.4
273 298
300 318 485 34 430 92 345 8 12 18 395 4 16
323.9 352 31.2
350 355.6 555 38 490 100 398 8 12 20 450 4 M30 (1-1/8") 33
368 45.0
400 406.4 620 40 550 110 452 8.8 12 20 505 4
419 58.7
500 508 730 44 660 125 558 10 12 20 615 4
20
M33 (1-1/4") 36
521 86.1
600 609.6 845 46 770 125 660 11 12 20 720 5 M36 (1-3/8") 39
622 101
DIN 2642, DIN Connections
LOOSE FLANGE FOR FLANGE COLLAR PN 10
Nom
Pipe 
size
Flange
D
mm
d5
mm
b
mm
r
mm
k
mm

Drilling
Number

d2
mm
Weight
kg
Collar
g
mm
10
15
20
90
95
105
16
23
28

16
16
16

5
5
5

60
65
75
4
4
4

15
15
15

0.23
0.26
0.30
45
50
60

25
32
40

115
140
150
33
42
50
16
16
16

5
5
5

85
100
110

4
4
4

15
18
18
0.37
0.54
0.5
70
82
0.92
50
65
80
165
185
200
62
81
94
18
18
20

5
5
5

125
145
160

4
4
4

18
18
18
0.80
0.90
1.28
107
127
142
100
125
150
220
250
285
113
138
164
20
22
22

5
6
6

180
210
240
8
8
8
18
18
22
1.37
1.78
2.27
162
192
218
175
200
250
315
340
395
195
222
273
24
24
26

6
7
7

270
295
350
8
8
12
22
22
22
2.90
3.16
4.22
248
273
328
300
350
400
445
505
565
324
374
426
26
26
32

7
8
8

400
460
515
12
16
16
22
22
25
4.80
5.85
8.45
378
438
490
450
500
600
615
670
780
475
530
630
32
34
36

8
8
10

565
620
725
20
20
20
25
25
30
9.45
11.35
15.30
540
595
695
700
800
895
1015
730
832
40
44
10
10
840
950
24
24
30
34
21.40
30.50
810
916
DIN 2635
WELDING NECK FLANGES NOMINAL PRESSURE 40
Pipe Flange Neck Raised 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 16 60 35 25 1.8 4 6 40 2 4 M12 (1/2") 14 0.661
17.2 28
15 20 95 16 65 38 30 2 4 6 45 2
0.746
21.3 32
20 25 105 18 75 40 38 2.3 4 6 58 2
106
26.9 40
25 30 115 18 85 40 42 2.6 4 6 68 2
1.29
33.7 46
32 38 140 18 100 42 52 2.6 6 6 78 2
1.88
42.4 56
40 44.5 150 18 110 45 60 2.6 6 7 88 3
2.33
48.3 64
50 57 165 20 125 48 72 2.9 6 8 102 3
M16 (5/8") 18 2.82
60.3 75
65 76.1 185 22 145 52 90 2.9 6 10 122 3
3.74
80 88.9 200 24 160 58 105 3.2 8 12 138 3
4.75
100 108 235 24 190 65 128 3.6 8 12 138 3 8 M20 (3/4") 23 6.52
114.3 134
125 133 270 26 220 68 155 4 8 12 188 3 8 M24 (7/8") 27 9.07
139.7 162
150 159 300 28 250 75 182 4.5 10 12 188 3
M24 (7/8")
11.8
168.3 192
175 191 350 32 295 82 215 5.6 10 16 285 3 12 M27 (1") 30 18.2
193.7 218
200 216 375 34 320 88 240 6.3 10 16 285 3
21.5
219.1 244
250 267 450 38 385 105 298 7.1 12 18 345 3
34.9
273 306
300 318 515 42 450 115 352 8 12 18 410 4 16 M30 (1-1/8") 33 49.7
323.9 362
350 355.6 580 46 510 125 408 8.8 12 20 460 4
M33 (1-1/4") 36
368 68.1
400 406.4 660 50 585 135 462 11 12 20 535 4
M36 (1-3/8") 39
419 96.5
500 508 755 52 670 140 562 14.2 12 20 615 4 20 M39 (1-1/2") 42
521 117
BS 10
 
   
 
 
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