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Technical Info

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

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

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

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

250 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 		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 		....
.....
.... 		....
.....
.... 		....
.....
.... 		....
.....
.... 		....
.....
.... 		....
.....
....

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