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TECHNICAL SPECIFICATIONS
 
 
 Chemical Composition  of Stainless Steel
 
 Mechnical Composition  of Stainless Steel
 
 Chemical Composition  of Carbon Steel
 
 Buttweld Fittings
 
 Forged Fittings
 
 Flanges Dimensions
 
 Alloy Steel Pipe
 
 Mild Steel
 
 Weight Formula
 
 

TECHNICAL COMPOSITION
      Flanges Dimensions
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
TOP

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
TOP

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
TOP

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
TOP

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 --- --- --- --- --- --- -- --- --
TOP

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 		....
.....
.... 		....
.....
.... 		....
.....
.... 		....
.....
.... 		....
.....
.... 		....
.....
....
TOP
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 		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
TOP

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
TOP

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
TOP

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
TOP

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
TOP

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
TOP

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
TOP
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