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FLANGES

FLANGES



150 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 89 11.2 47.6 15.9 15.9 60.5 4 15 35
3/4 117 15.9 57.2 25.4 25.4 82.5 4 15 43
1 108 14.3 55.6 17.5 17.5 79.5 4 15 51
1.1/4 117 15.9 57.2 20.6 20.6 89.0 4 15 64
1.1/2 127 17.5 61.9 22.2 22.2 98.5 4 15 73
2 152 19.1 63.5 25.4 25.4 120.5 4 19 92
2.1/2 178 22.3 69.8 28.6 28.6 139.5 4 19 105
3 190 23.9 69.8 30.2 30.2 152.5 4 19 127
3.1/2 216 23.9 71.4 31.8 31.8 178.0 8 19 140
4 229 23.9 86.2 33.3 33.3 190.5 8 19 157
5 254 23.9 88.9 36.5 36.5 216.0 8 22 186
6 279 25.4 88.9 39.7 39.7 241.5 8 22 216
8 343 28.6 101.6 44.4 44.4 298.5 8 22 270
10 406 30.2 101.6 49.2 49.2 362.0 12 25 324
12 483 31.8 114.3 55.6 55.6 432.0 12 25 381
14 533 35.0 127.0 57.2 79.4 476.0 12 29 413
16 597 36.6 127.0 63.5 87.3 539.5 16 29 470
18 635 39.7 139.7 68.3 96.8 578.0 16 32 533
20 698 42.9 144.5 73.0 103.2 635.0 20 32 584
24 813 47.7 152.4 82.6 111.1 749.5 20 35 692

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300 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 95 14.3 52.4 22.2 22.2 666.5 4 15 35
3/4 117 15.9 57.2 25.4 25.4 82.4 4 19 43
1 124 17.5 61.9 27.0 27.0 89.0 4 19 51
1-1/4 133 19.1 65.1 27.0 27.0 98.5 4 19 64
1-1/2 156 20.7 68.3 30.2 30.2 114.5 4 22 73
2 165 22.3 69.8 33.3 33.3 127.0 8 19 92
2-1/2 190 25.4 76.2 38.1 38.1 149.0 8 22 105
3 210 28.6 79.4 42.9 42.9 168.0 8 22 127
4 254 318 85.7 47.6 47.6 200.0 8 22 157
5 279 35.0 98.4 50.8 50.8 235.0 8 22 186
6 313 36.6 98.4 52.4 52.4 270.0 12 22 216
6 381 413 111.1 61.9 91.9 330.0 12 25 270
10 444 47.7 117.5 66.7 95.3 387.5 16 29 324
12 521 50.8 130.2 73.0 101.6 451.0 16 32 381
14 584 54.0 142.9 76.2 111.1 514.5 20 32 413
16 648 57.2 146.0 82.6 120.7 571.5 20 35 470
18 711 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

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600 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 95 14.3 52.4 22.2 22.2 66.5 4 15 35
3/4 117 15.9 57.2 25.4 25.4 82.5 4 19 43
1 124 17.5 61.9 27.0 27.0 89.0 4 19 51
1-1/4 133 20.7 66.7 28.6 28.6 98.5 4 19 64
1-1/2 156 22.3 69.8 31.8 31.8 114.5 4 22 73
2 165 25.4 73.0 36.5 36.5 127.0 8 19 92
2-1/2 190 28.6 79.4 41.3 41.3 149.0 8 22 105
3 210 31.8 82.6 46.0 46.0 168.0 8 22 127
3-1/2 229 35.0 85.7 49.2 49.2 184.0 8 25 140
4 273 38.1 101.6 54.0 54.0 216.0 8 25 157
5 330 44.5 114.3 60.3 60.3 266.5 8 29 186
6 356 47.7 117.5 66.7 66.7 292.0 12 29 216
8 419 55.6 133.4 76.2 76.2 349.0 12 32 270
10 508 63.5 152.4 85.7 115.1 432.0 16 85 324
12 559 66.7 155.6 92.1 111.1 489.0 20 35 381
14 603 69.9 165.1 93.7 117.5 527.0 20 38 413
16 686 76.2 177.8 106.4 127.0 603.0 20 41 470
18 743 82.6 184.2 117.6 139.7 654.0 20 45 533
20 813 88.9 190.5 127.0 165.1 724.0 24 45 584
24 940 101.6 203.2 139.7 184.2 838.0 24 51 692

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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

Top

1500 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 12.1 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 73.0 41.3 41.3 101.5 4 25 51
1-1/4 159 28.6 73.0 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 73
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
3 267 47.7 117.5 73.0 73.0 203.0 8 32 127
3-1/2
4 311 54.0 123.8 90.5 90.5 241.5 8 35 157
5 375 73.1 155.5 104.8 104.8 292.0 8 41 186
6 394 82.6 171.4 119.1 119.1 317.5 12 38 216
8 483 92.1 212.7 142.9 142.9 393.5 12 45 270
10 584 108.0 254.0 158.8 177.8 482.5 12 51 324
12 673 123.9 282.9 181.0 219.1 571.5 16 54 381
14 749 133.4 298.4 ----- 241.3 635.0 16 60 413
16 826 146.1 311.2 ----- 260.4 705.0 16 51 470
18 914 162.0 327.0 ------ 276.2 474.5 16 73 538
20 984 117.8 355.4 ----- 292.1 832.0 16 80 584
24 1168 203.2 406.4 ----- 330.2 990.5 16 92 692

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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 --- --- --- --- --- --- -- --- --

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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		 Double
Extra
Strong
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		 0.252
0.434
0.599
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		 0.896
1.100
1.503
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
....		 1.771
2.300
2.728
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		 3.152
4.063
4.897
6.875
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		 8.750
10.750
....
....
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		 ....
.....
....		 ....
.....
....		 ....
.....
....		 ....
.....
....		 ....
.....
....		 ....
.....
....

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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