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

15.7

15.7

60.5

4

15.7

35.1

3/4

99

12.7

57.2

15.7

15.7

69.9

4

15.7

42.9

1

108

14.3

55.6

17.5

17.5

79.2

4

15.7

50.8

1.1/4

117

15.7

57.2

20.6

20.6

89.9

4

15.7

63.5

1.1/2

127

17.5

61.9

22.4

22.2

98.6

4

15.7

73.2

2

152

19.1

63.5

25.4

25.4

120.7

4

19.1

91.9

2.1/2

178

22.4

69.9

28.4

28.4

139.7

4

19.1

104.6

3

191

23.9

69.9

30.2

30.2

152.4

4

19.1

127

3.1/2

216

23.9

71.4

31.8

31.8

177.8

8

19.1

139.7

4

229

23.9

76.2

33.3

33.3

190.5

8

19.1

157.2

5

254

23.9

88.9

36.6

36.6

215.9

8

22.4

185.7

6

279

25.4

88.9

39.6

39.6

241.3

8

22.4

215.9

8

343

28.4

101.6

44.5

44.5

298.5

8

22.4

269.7

10

406

30.2

101.6

49.3

49.3

362.0

12

25.4

323.9

12

483

31.8

114.3

55.6

55.6

431.8

12

25.4

381

14

533

35.1

127.0

57.2

79.2

476.3

12

28.4

412.8

16

597

36.6

127.0

63.5

87.4

539.8

16

28.4

469.9

18

635

39.6

139.7

68.3

93.8

577.9

16

31.8

533.4

20

699

42.9

144.5

73.2

103.1

635.0

20

31.8

584.2

24

813

47.8

152.4

82.6

111.3

749.3

20

35.1

692.2

| 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

14.2

52.3

22.4

22.4

66.5

4

15.7

35.1

3/4

117

15.7

57.2

25.4

25.4

82.6

4

19.1

42.9

1

124

17.5

62

26.9

26.9

88.9

4

19.1

50.8

1-1/4

133

19.1

65

26.9

26.9

98.6

4

19.1

63.5

1-1/2

155

20.6

68

30.2

30.2

114.3

4

22.4

73.2

2

165

22.4

69.9

33.3

33.3

127.0

8

19.1

91.9

2-1/2

191

25.4

76.2

38.1

38.1

149.4

8

22.4

104.6

3

210

28.6

79.2

42.9

42.9

168.1

8

22.4

127

3.1/2

229

30.2

81

44.5

44.5

184.2

8

22.4

139.7

4

254

31.8

85.9

47.6

47.8

200.2

8

22.4

157.2

5

279

35.0

98.6

50.8

50.8

235.0

8

22.4

185.7

6

318

36.6

98.6

52.3

52.3

269.7

12

22.4

215.9

8

381

41.1

111.3

62

62

330.2

12

25.4

269.7

10

445

47.8

117.3

66.5

95.3

387.4

16

28.4

323.9

12

521

50.8

130

73.2

101.6

450.9

16

31.8

381

14

584

53.8

142.7

76.2

111.3

514.4

20

31.8

412.8

16

648

57.2

146.1

82.6

120.7

571.5

20

35.1

469.9

18

711

60.5

158.8

88.9

130.2

628.7

24

35.1

533.4

20

775

63.5

162.1

95.3

139.7

685.8

24

35.1

584.2

24

914

69.9

168.1

106.4

152.4

812.8

24

41.1

692.2

| 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

14.2

52.3

22.4

22.2

66.5

4

15.7

35.1

3/4

117

15.7

57.2

25.4

25.4

82.6

4

19.1

42.9

1

124

17.5

62

26.9

26.9

89.9

4

19.1

50.8

1-1/4

133

20.6

66.5

28.4

28.4

98.6

4

19.1

63.5

1-1/2

155

22.4

69.9

31.8

31.8

114.3

4

22.4

73.2

2

165

25.4

73.2

36.6

36.6

127.0

8

19.1

91.9

2-1/2

191

28.4

79.2

41.1

41.1

149.4

8

22.4

104.6

3

210

31.8

82.6

46.0

46.0

168.1

8

22.4

127

3-1/2

229

35.1

85.9

49.3

49.3

184.2

8

25.4

139.7

4

273

38.1

101.6

53.8

53.8

215.9

8

25.4

157.2

5

330

44.5

114.3

60.5

60.5

266.7

8

28.4

185.7

6

356

47.8

117.3

66.5

66.5

292.1

12

28.4

215.9

8

419

55.6

133.4

76.2

76.2

349.3

12

31.8

269.7

10

508

63.5

152.4

85.9

111.3

431.8

16

35.1

323.9

12

559

66.5

155.6

91.9

117.3

489.0

20

35.1

381

14

603

69.5

165.1

93.7

127

527.1

20

38.1

412.8

16

686

76.2

177.8

106.4

139

603.3

20

41.1

469.9

18

743

82.6

184.2

117.3

152.4

654.1

20

44.5

533.4

20

813

88.9

190.5

127.0

165.1

723.9

24

44.5

584.2

24

940

101.6

203.2

139.7

184.2

838.2

24

50.8

692.2

| Top |

900 LB. FLANG

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

22.4

60.5

31.8

31.8

82.6

4

22.4

35.1

3/4

130

25.4

69.9

35.1

35.1

88.9

4

22.4

42.9

1

149

28.4

73.2

41.1

41.1

101.6

4

25.4

50.8

1-1/4

159

28.4

73.2

41.1

41.1

111.3

4

25.4

63.5

1-1/2

178

31.8

82.6

44.5

44.5

124.0

4

28.4

73.2

2

216

38.1

101.6

57.2

57.2

165.1

8

25.4

91.9

2-1/2

244

41.1

104.8

63.5

63.5

190.5

8

28.4

104.6

3

241

38.1

101.6

53.8

53.8

190.5

8

25.4

127

4

292

44.5

114.3

69.9

69.9

235.0

8

31.8

157.2

5

349

50.8

127.0

79.2

79.2

279.4

8

35.1

185.7

6

381

55.6

139.7

85.9

85.9

317.5

12

31.8

215.9

8

470

63.5

162.1

101.6

114.3

393.7

12

38.1

269.7

10

546

69.9

184.2

108.0

127.0

469.9

16

38.1

323.9

12

610

79.2

200.2

117.3

142.7

533.4

20

38.1

381

14

641

85.9

212.9

130.3

155.4

558.8

20

41.1

412.8

16

705

88.9

215.9

133.4

165.1

616

20

44.5

469.9

18

787

101.6

228.6

152.4

190.5

685.8

20

50.8

533.4

20

857

108

247.7

158.8

209.6

749.3

20

53.8

584.2

24

1041

139.7

292.1

203.2

266.7

901.7

20

66.5

692.2

| 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

121

22.4

60.5

31.8

31.8

82.6

4

22.4

35.1

3/4

130

25.4

69.9

35.1

35.1

88.9

4

22.4

42.9

1

149

28.4

73.2

41.1

41.4

101.6

4

25.5

50.8

1-1/4

159

28.4

73.2

41.1

41.1

111.3

4

25.5

63.5

1-1/2

178

31.8

82.6

44.5

44.5

124.0

4

28.4

73.2

2

216

38.1

101.6

57.2

57.2

165.1

8

25.4

91.9

2-1/2

244

41.1

104.8

63.5

63.5

190.5

8

28.4

104.6

3

267

47.8

117.3

73.2

73.2

203.2

8

31.8

127

4

311

53.8

124

90.4

90.4

241.3

8

35.1

157.2

5

375

73.2

155.4

104.6

104.6

292.1

8

41.1

185.7

6

394

82.6

171.5

119.1

119.1

317.5

12

38.1

215.9

8

483

92.9

212.9

142.7

142.7

393.7

12

44.5

269.7

10

584

108.0

254.0

158.8

177.8

482.6

12

50.8

323.9

12

673

124

282.4

180.8

218.9

571.5

16

53.8

381

14

749

133.4

298.5

—–

241.3

635.0

16

60.5

412.8

16

826

146.1

311.2

—–

260.4

704.9

16

66.5

469.9

18

914

162.0

327.2

——

276.4

747.7

16

73.2

533.4

20

984

117.8

355.6

—–

292.1

831.9

16

79.2

584.2

24

1168

203.2

406.4

—–

330.2

990.6

16

91.9

692.2

| 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

30.2

73.2

39.6

39.6

88.9

4

22

34.9

3/4

140

31.8

79.2

42.9

42.9

95.3

4

22

42.9

1

159

35.1

88.9

47.6

47.6

108.0

4

25

50.8

1-1/4

184

38.1

95.3

52.3

52.3

130

4

29

63.5

1-1/2

203

44.5

111.3

60.5

60.5

146.1

4

32

73.0

2

235

50.8

127.0

69.9

69.9

171.5

8

29

92.1

2-1/2

267

57.2

142.7

79.2

79.2

196.9

8

32

104.8

3

305

66.5

168.1

91.9

92.9

228.6

8

35

127.0

4

356

76.2

190.5

108.0

108.

273.1

8

41

157.2

5

419

91.9

228.6

130.2

130.

323.9

8

48

185.7

6

4823

108.0

273.1

152.4

152.4

368.3

8

54

215.9

8

552.

127.0

317.5

177.8

177.8

438.2

12

54

269.9

10

673

165.1

419.1

228.6

228.6

539.8

12

67

323.9

12

762

184.2

463.6

254.0

254.0

619.3

12

73

381.03


| 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 |

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

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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

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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

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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

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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

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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

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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