Flange table size quick reference and comparison guide.

Flange size charts according to NB (Nominal Bore Size), giving the flange diameter, Thickness and PCD (Pitch circle diameter) or diameter of bolt holes, Number of bolt holes and bolt diameter and length.

This flange data guide covers PN6, PN10, PN16, PN25, PN40, PN64, Table D, Table E, Table F, Table H, ANSI150Lb and ANSI300Lb,


Explanation of DN and PCD



 

1/2" NB (DN15) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

80mm

12mm

55mm

4

M10 / 45

PN10

95mm

14mm

65mm

4

M12 / 50

PN16

95mm

14mm

65mm

4

M12 / 50

PN25

95mm

16mm

65mm

4

M12 / 55

PN40

95mm

16mm

65mm

4

M12 / 55

PN64

105mm

20mm

75mm

4

M12 / 70

Table D

3.3/4"

3/16"

2.5/8"

4

M12 / 25

Table E

3.3/4"

1/4"

2.5/8"

4

M12 / 30

Table F

3.3/4"

3/8"

2.5/8"

4

M12 / 40

Table H

4.1/2"

1/2"

3.1/4"

4

M16 / 50

ANSI 150

3.1/2"

7/16"

2.3/8"

4

M12 / 45

ANSI 300

3.3/4"

9/16"

2.5/8"

4

M12 / 50



3/4" NB (DN20) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

90mm

14mm

65mm

4

M10 / 50

PN10

105mm

16mm

75mm

4

M12 / 55

PN16

105mm

16mm

75mm

4

M12 / 55

PN25

105mm

16mm

75mm

4

M12 / 55

PN40

105mm

18mm

75mm

4

M12 / 55

PN64

130mm

22mm

90mm

4

M16 / 70

Table D

4"

3/16"

2.7/8"

4

M12 / 25

Table E

4"

1/4"

2.7/8"

4

M12 / 30

Table F

4"

3/8"

2.7/8"

4

M12 / 40

Table H

4.1/2"

1/2"

3.1/4"

4

M16 / 50

ANSI 150

3.7/8"

1/2"

2.3/4"

4

M12 / 50

ANSI 300

4.5/8"

5/8"

3.1/2"

4

M12 / 55



1" NB (DN25) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

100mm

14mm

75mm

4

M10 / 50

PN10

115mm

16mm

85mm

4

M12 / 55

PN16

115mm

16mm

85mm

4

M12 / 55

PN25

115mm

18mm

85mm

4

M12 / 65

PN40

115mm

18mm

85mm

4

M12 / 65

PN64

140mm

24mm

100mm

4

M16 / 75

Table D

4.1/2"

3/16"

3.1/4"

4

M12 / 25

Table E

4.1/2"

9/32"

3.1/4"

4

M12 / 30

Table F

4.3/4"

3/8"

3.7/16"

4

M16 / 45

Table H

4.3/4"

9/16"

3.7/16"

4

M16 / 50

ANSI 150

4.1/4"

9/16"

3.1/8"

4

M12 / 50

ANSI 300

4.7/8"

11/16"

3.1/2"

4

M16 / 65



11/4" NB (DN32) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

120mm

16mm

90mm

4

M12 / 55

PN10

140mm

16mm

100mm

4

M16 / 55

PN16

140mm

16mm

100mm

4

M16 / 55

PN25

140mm

18mm

100mm

4

M16 / 55

PN40

140mm

18mm

100mm

4

M16 / 65

PN64

155mm

24mm

110mm

4

M20 / 75

Table D

4.3/4"

1/4"

3.7/16"

4

M12 / 30

Table E

4.3/4"

5/16"

3.7/16"

4

M12 / 40

Table F

5.1/4"

1/2"

3.7/8"

4

M16 / 45

Table H

5.1/4"

11/16"

3.7/8"

4

M16 / 55

ANSI 150

4.5/8"

5/8"

2.3/8"

4

M12 / 55

ANSI 300

5.1/4"

3/4"

3.7/8"

4

M12 / 70



11/2" NB (DN40) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

130mm

16mm

100mm

4

M12 / 55

PN10

150mm

16mm

110mm

4

M16 / 55

PN16

150mm

16mm

110mm

4

M16 / 55

PN25

150mm

20mm

110mm

4

M16 / 70

PN40

150mm

20mm

110mm

4

M16 / 70

PN64

170mm

26mm

125mm

4

M20 / 80

Table D

5.1/4"

1/4"

3.7/8"

4

M12 / 30

Table E

5.1/4"

11/32"

3.7/8"

4

M12 / 40

Table F

5.1/2"

1/2"

4.1/8"

4

M16 / 55

Table H

5.1/2"

11/16"

4.1/8"

4

M16 / 55

ANSI 150

5"

11/16"

2.7/8"

4

M12 / 55

ANSI 300

6.1/8"

13/16"

4.1/2"

4

M16 / 75



2" NB (DN50) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

140mm

16mm

110mm

4

M12 / 55

PN10

165mm

18mm

125mm

4

M16 / 65

PN16

165mm

18mm

125mm

4

M16 / 65

PN25

165mm

20mm

125mm

4

M16 / 70

PN40

165mm

20mm

125mm

4

M16 / 70

PN64

180mm

26mm

135mm

4

M20 / 80

Table D

6"

5/16"

4.1/2"

4

M16 / 40

Table E

6"

3/8"

4.1/2"

4

M16 / 45

Table F

6.1/2"

5/8"

5"

4

M16 / 55

Table H

6.1/2"

3/4"

5"

4

M16 / 55

ANSI 150

6"

3/4"

4.3/4"

4

M16 / 70

ANSI 300

6.1/2"

7/8"

5"

8

M16 / 75



21/2" NB (DN65) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

160mm

16mm

130mm

4

M12 / 65

PN10

185mm

18mm

145mm

4

M16 / 65

PN16

185mm

18mm

145mm

4

M16 / 65

PN25

185mm

22mm

145mm

8

M16 / 70

PN40

185mm

22mm

145mm

8

M16 / 70

PN64

205mm

26mm

160mm

8

M20 / 80

Table D

6.1/2"

5/16"

5"

4

M16 / 40

Table E

6.1/2"

13/32"

5"

4

M16 / 45

Table F

7.1/4"

5/8"

5.3/4"

8

M16 / 55

Table H

7.1/4"

3/4"

5.3/4"

8

M16 / 55

ANSI 150

7"

7/8"

5.1/2"

4

M16 / 70

ANSI 300

7.1/2"

1"

5.7/8"

8

M20 / 75



3" NB (DN80) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

190mm

18mm

150mm

4

M16 / 65

PN10

200mm

20mm

160mm

8

M16 / 70

PN16

200mm

20mm

160mm

8

M16 / 70

PN25

200mm

24mm

160mm

8

M16 / 75

PN40

200mm

24mm

160mm

8

M16 / 75

PN64

215mm

30mm

170mm

8

M20 / 90

Table D

7.1/4"

3/4"

5.3/4"

4

M16 / 45

Table E

7.1/4"

7/16"

5.3/4"

4

M16 / 45

Table F

8"

5/8"

6.1/2"

8

M16 / 55

Table H

8"

7/8"

6.1/2"

8

M16 / 70

ANSI 150

7.1/2"

1/16"

6"

4

M16 / 75

ANSI 300

7.1/4"

1.1/8"

6.5/8"

8

M20 / 90



4" NB (DN100) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

210mm

18mm

170mm

4

M16 / 65

PN10

220mm

20mm

180mm

8

M16 / 70

PN16

220mm

20mm

180mm

8

M16 / 70

PN25

235mm

26mm

190mm

8

M20 / 80

PN40

235mm

26mm

190mm

8

M20 / 80

PN64

250mm

32mm

200mm

8

M24 / 90

Table D

8.1/2"

3/8"

7"

4

M16 / 45

Table E

8.1/2"

1/2"

7"

8

M16 / 50

Table F

9"

3/4"

7.1/2"

8

M26 / 65

Table H

9"

1"

7.1/2"

8

M26 / 75

ANSI 150

9"

15/16"

7.1/2"

8

M16 / 75

ANSI 300

10"

1.1/4"

7.7/8"

8

M20 / 95



5" NB (DN125) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

265mm

20mm

225mm

8

M16 / 70

PN10

285mm

22mm

240mm

8

M20 / 70

PN16

285mm

22mm

240mm

8

M20 / 70

PN25

300mm

28mm

250mm

8

M24 / 80

PN40

300mm

30mm

250mm

8

M24 / 90

PN64

345mm

36mm

280mm

8

M30 / 105

Table D

11"

1/2"

9.1/4"

8

M16 / 50

Table E

11"

11/16"

9.1/4"

8

M20 / 65

Table F

12"

7/8"

10.1/4"

12

M20 / 70

Table H

12"

1.1/8"

10.1/4"

8

M20 / 80

ANSI 150

11"

1"

9.1/2"

8

M20 / 80

ANSI 300

12.1/2"

1.7/16"

10.5/8"

8

M20 / 105



6" NB (DN150) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

240mm

20mm

200mm

8

M16 / 70

PN10

250mm

22mm

210mm

8

M16 / 70

PN16

250mm

22mm

210mm

8

M16 / 70

PN25

270mm

28mm

220mm

8

M24 / 80

PN40

270mm

28mm

220mm

8

M24 / 80

PN64

295mm

34mm

240mm

8

M27 / 100

Table D

10"

1/2"

8.1/4"

8

M16 / 50

Table E

10"

9/16"

8.1/4"

8

M16 / 50

Table F

11"

7/8"

9.1/4"

8

M20 / 70

Table H

11"

1.1/8"

9.1/4"

8

M20 / 80

ANSI 150

10"

15/16"

8.1/2"

8

M20 / 80

ANSI 300

11"

1.3/8"

9.1/4"

9

M20 / 100



8" NB (DN200) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

320mm

22mm

280mm

8

M16 / 70

PN10

340mm

24mm

295mm

8

M20 / 75

PN16

340mm

24mm

295mm

12

M20 / 75

PN25

360mm

30mm

310mm

12

M24 / 90

PN40

375mm

34mm

320mm

12

M27 / 90

PN64

415mm

46mm

345mm

12

M33 / 130

Table D

13.1/4"

1/2"

11.1/2"

8

M16 / 50

Table E

13.3/4"

9/16"

11.1/2"

8

M20 / 65

Table F

14.1/2"

7/8"

12.3/4"

12

M20 / 75

Table H

14.1/2"

1.1/8"

12.3/8"

12

M20 / 90

ANSI 150

13.1/2"

15/16"

11.3/4"

8

M20 / 90

ANSI 300

15"

1.3/8"

13"

12

M22 / 105



10" NB (DN250) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

375mm

24mm

335mm

12

M16 / 70

PN10

395mm

26mm

350mm

12

M20 / 80

PN16

405mm

26mm

355mm

12

M24 / 80

PN25

425mm

38mm

370mm

12

M24 / 90

PN40

450mm

42mm

385mm

12

M30 / 120

PN64

470mm

54mm

400mm

12

M33 / 150

Table D

16"

5/8"

14"

8

M20 / 55

Table E

16"

7/8"

14"

12

M20 / 70

Table F

17"

1.1/8"

15"

12

M22 / 80

Table H

17"

1.3/8"

15"

12

M22 / 100

ANSI 150

16"

1.3/16"

14.1/4"

12

M22 / 95

ANSI 300

12.1/2"

1.7/16"

10.5/8"

16

M20 / 105



12" NB (DN300) Flange Table Dimensions

Type:

Diameter

Thickness

PCD

No. of holes

Diameter / Bolt Length

PN6

440mm

24mm

395mm

12

M20 / 70

PN10

445mm

26mm

400mm

12

M20 / 80

PN16

460mm

26mm

410mm

12

M24 / 80

PN25

485mm

40mm

430mm

16

M27 / 110

PN40

515mm

50mm

450mm

16

M30 / 140

PN64

530mm

62mm

460mm

16

M33 / 160

Table D

18"

5/8"

16"

12

M20 / 65

Table E

18"

7/8"

16"

12

M22 / 80

Table F

19.1/4"

1.1/8"

17.1/4"

16

M22 / 90

Table H

19.1/4"

1.3/8"

17.1/4"

16

M22 / 105

ANSI 150

19"

1.3/16"

17"

12

M22 / 100

ANSI 300

20.1/2"

1.7/16"

17.3/4"

16

M28 / 130



JIS10K Flange Dimension Tables

JIS 10K Flange dimensions

Nominal Dia. of Flange

Outside Dia. of Flange D

Sectional Dimensions of flange

Nominal Bolt Size

Welding

Weight
(kg)

Dia. of Bolt Circle

C

Dia.of Raised Face 
g

Inside Dia.of Flange
do

Outside Dia.of Applicable Pipe

f

T

Dia.of Hub

Radius
r

Raised Face

Hole Dia.
h

Number of Bolt Holes

W1

W2

a

b

10
15
20
25
32

90
95
100
125
135

65
70
75
90
100

46
51
56
67
76

17.8
22.2
27.7
34.5
43.2

17.3
21.7
27.2
34
42.7

12
12
14
14
16

--
--
--
--
--

--
--
--
--
--

--
--
--
--
--

--
--
--
--
--

1
1
1
1
2

15
15
15
19
19

4
4
4
4
4

M12
M12
M12
M16
M16

5
5
5
5
6

2.5
3
3
3
3

0.52
0.57
0.73
1.13
1.48

50
50
65
80
(90)

140
155
175
185
195

105
120
140
150
160

81
96
116
126
136

49.1
61.1
77.1
90
102.6

48.6
60.5
76.3
89.1
101.6

--
16
18
18
18

--
--
--
--
--

--
--
--
--
--

--
--
--
--
--

--
--
--
--
--

2
2
2
2
2

19
19
19
19
19

4
4
4
8
8

M12
M12
M12
M12
M12

6
6
6.5
6.5
6.5

3
3
4
4
4

1.56
1.88
2.6
2.61
2.76

100
125
150
(175)
200

210
250
280
305
330

175
210
240
265
290

151
182
212
237
262

115.4
141.2
166.6
192.1
218

114
139.8
165.2
190.7
216.3

18
20
22
22
22

--
--
--
--
--

--
--
--
--
--

--
--
--
--
--

--
--
--
--
--

2
2
2
2
2

19
23
23
23
23

8
8
8
12
12

M12
M20
M20
M20
M20

7
7.5
8
9
9

4
4
5
5
6

3.14
4.77
6.34
6.82
7.53

(225)
250
300

350
400
445

310
355
400

282
324
368

243.7
269.5
321

241.8
267.4
318.5

22
24
24

-
36
38

-
288
340

-
292
346

-
6
6

2
2
3

23
25
25

12
12
16

M20
M22
M22

9
10
10

6
6
6

7.74
12.7
13.8

350
400
450
500
550

490
560
620
675
745

445
510
565
620
680

413
475
530
585
640

358.1
409
460
511
562

355.6
406.4
457.2
508
558.8

26
28
30
30
32

42
44
48
48
52

380
436
496
548
604

386
442
502
554
610

6
6
6
6
6

3
3
3
3
3

25
27
27
27
33

16
16
20
20
20

M22
M24
M24
M24
M30

12
12
14
14
15

7
7
8
8
9

18.2
25.2
33
37.6
49.7

600
650
700
750
800

795
845
905
970
1020

730
780
840
900
950

690
740
800
855
905

613
664
715
766
817

609.6
660.4
711.2
762
812.8

32
34
345
36
36

52
56
58
62
64

656
706
762
816
868

662
712
770
824
876

6
6
6
6
6

3
3
3
3
3

33
33
33
33
33

24
24
24
24
28

M30
M30
M30
M30
M30

16
16
17
18
19

10
10
10
11
12

52.6
60.6
70.6
85.8
91.2

850
900
1000
*(1100)
*1200

1070
1120
1235
1345
1465

1000
1050
1160
1270
1380

955
1005
1110
1220
1325

868
919
1021
1123
1225

863.6
914.4
1016
1117.6
1219.2

36
38
40
42
44

66
70
74

--
--

920
971
1073

--
--

928
979
1081
--
--

6
6
6
--
--

3
3
3
3
3

33
33
39
39
39

28
28
28
28
32

M30
M30
M36
M36
M36

19
22
22

12
14
14

98.6
109
133

*1350
(1500)

1630
1795

1540
1700

1480
1635

--
--

1371.6
1524.0

48
50

--
--

--
--

--
--

--
--

3
3

45
45

36
40

M42
M42



ANSI Flange and Bolt Dimensions - 150 lb to 2500 lb - ASME/ANSI B16.5


Diameters and bolt circles for standard ASME B16.5 flanges - 1/4 to 24 inches - 150 psi to 2500 psi

suitable for ANSI150Lb Flange Solenoid Valves

Nominal Pipe Size
NPS
(inches)

150 psi

Diameter of
Flange
(inches)

No.
of
Bolts

Diameter of
Bolts
(inches)

Bolt
Circle
 (inches)

1/4

3-3/8

4

1/2

2-1/4

1/2

3-1/2

4

1/2

2-3/8

3/4

3-7/8

4

1/2

2-3/4

1

4-1/4

4

1/2

3-1/8

1-1/4

4-5/8

4

1/2

3-1/2

1-1/2

5

4

1/2

3-7/8

2

6

4

5/8

4-3/4

2-1/2

7

4

5/8

5-1/2

3

7-1/2

4

5/8

6

3-1/2

8-1/2

8

5/8

7

4

9

8

5/8

7-1/2

5

10

8

3/4

8-1/2

6

11

8

3/4

9-1/2

8

13-1/2

8

3/4

11-3/4

10

16

12

7/8

14-1/4

12

19

12

7/8

17

14

21

12

1

18-3/4

16

23-1/2

16

1

21-1/4

18

25

16

1-1/8

22-3/4

20

27-1/2

20

1-1/8

25

24

32

20

1-1/4

29-1/2

Nominal Pipe Size
NPS
(inches)

300 psi

Diameter of
Flange
(inches)

No.
of
Bolts

Diameter of
Bolts
(inches)

Bolt
Circle
 (inches)

1/4

3-3/8

4

1/2

2-1/4

1/2

3-3/4

4

1/2

2-5/8

3/4

4-5/8

4

5/8

3-1/4

1

4-7/8

4

5/8

3-1/2

1-1/4

5-1/4

4

5/8

3-7/8

1-1/2

6-1/8

4

3/4

4-1/2

2

6-1/2

8

5/8

5

2-1/2

7-1/2

8

3/4

5-7/8

3

8-1/4

8

3/4

6-5/8

3-1/2

9

8

3/4

7-1/4

4

10

8

3/4

7-7/8

5

11

8

3/4

9-1/4

6

12-1/2

12

3/4

10-5/8

8

15

12

7/8

13

10

17-1/2

16

1

15-1/4

12

20-1/2

16

1-1/8

17-3/4

14

23

20

1-1/8

20-1/4

16

25-1/2

20

1-1/4

22-1/2

18

28

24

1-1/4

24-3/4

20

30-1/2

24

1-1/4

27

24

36

24

1-1/2

32


Nominal Pipe Size
NPS
(inches)

400 psi

Diameter of
Flange
(inches)

No.
of
Bolts

Diameter of
Bolts
(inches)

Bolt
Circle
(inches)

1/4

3-3/8

4

1/2

2-1/4

1/2

3-3/4

4

1/2

2-5/8

3/4

4-5/8

4

5/8

3-1/4

1

4-7/8

4

5/8

3-1/2

1-1/4

5-1/4

4

5/8

3-7/8

1-1/2

6-1/8

4

3/4

4-1/2

2

6-1/2

8

5/8

5

2-1/2

7-1/2

8

3/4

5-7/8

3

8-1/4

8

3/4

6-5/8

3-1/2

9

8

7/8

7-1/4

4

10

8

7/8

7-7/8

5

11

8

7/8

9-1/4

6

12-1/2

12

7/8

10-5/8

8

15

12

1

13

10

17-1/2

16

1-1/8

15-1/4

12

20-1/2

16

1-1/4

17-3/4

14

23

20

1-1/4

20-1/4

16

25-1/2

20

1-3/8

22-1/2

18

28

24

1-3/8

24-3/4

20

30-1/2

24

1-1/2

27

24

36

24

1-3/4

32

Nominal Pipe Size
NPS
(inches)

600 psi

Diameter of
Flange
(inches)

No.
of
Bolts

Diameter of
Bolts
(inches)

Bolt
Circle
(inches)

1/4

3-3/8

4

1/2

2-1/4

1/2

3-3/4

4

1/2

2-5/8

3/4

4-5/8

4

5/8

3-1/4

1

4-7/8

4

5/8

3-1/2

1-1/4

5-1/4

4

5/8

3-7/8

1-1/2

6-1/8

4

3/4

4-1/2

2

6-1/2

8

5/8

5

2-1/2

7-1/2

8

3/4

5-7/8

3

8-1/4

8

3/4

6-5/8

3-1/2

9

8

7/8

7-1/4

4

10-3/4

8

7/8

8-1/2

5

13

8

1

10-1/2

6

14

12

1

11-1/2

8

16-1/2

12

1-1/8

13-3/4

10

20

16

1-1/4

17

12

22

20

1-1/4

19-1/4

14

23-3/4

20

1-3/8

20-3/4

16

27

20

1-1/2

23-3/4

18

29-1/4

20

1-5/8

25-3/4

20

32

24

1-5/8

28-1/2

24

37

24

1-7/8

33

Nominal Pipe Size
NPS
(inches)

900 psi

Diameter of
Flange
(inches)

No.
of
Bolts

Diameter of
Bolts
(inches)

Bolt
Circle
(inches)

1/2

4-3/4

4

3/4

3-1/4

3/4

5-1/8

4

3/4

3-1/2

1

5-7/8

4

7/8

4

1-1/4

6-1/4

4

7/8

4-3/8

1-1/2

7

4

1

4-7/8

2

8-1/2

8

7/8

6-1/2

2-1/2

9-5/8

8

1

7-1/2

3

9-1/2

8

7/8

7-1/2

4

11-1/2

8

1-1/8

9-1/4

5

13-3/4

8

1-1/4

11

6

15

12

1-1/8

12-1/2

8

18-1/2

12

1-3/8

15-1/2

10

21-1/2

16

1-3/8

18-1/2

12

24

20

1-3/8

21

14

25-1/4

20

1-1/2

22

16

27-3/4

20

1-5/8

24-1/2

18

31

20

1-7/8

27

20

33-3/4

20

2

29-1/2

24

41

20

2-1/2

35-1/2

Nominal Pipe Size
NPS
(inches)

1500 psi

Diameter of
Flange
(inches)

No.
of
Bolts

Diameter of
Bolts
(inches)

Bolt
Circle
(inches)

1/2

4-3/4

4

3/4

3-1/4

3/4

5-1/8

4

3/4

3-1/2

1

5-7/8

4

7/8

4

1-1/4

6-1/4

4

7/8

4-3/8

1-1/2

7

4

1

4-7/8

2

8-1/2

8

7/8

6-1/2

2-1/2

9-5/8

8

1

7-1/2

3

10-1/2

8

1-1/8

8

4

12-1/4

8

1-1/4

9-1/2

5

14-3/4

8

1-1/2

11-1/2

6

15-1/2

12

1-3/8

12-1/2

8

19

12

1-5/8

15-1/2

10

23

12

1-7/8

19

12

26-1/2

16

2

22-1/2

14

29-1/2

16

2-1/4

25

16

32-1/2

16

2-1/2

27-3/4

18

36

16

2-3/4

30-1/2

20

38-3/4

16

3

32-3/4

24

46

16

3-1/2

39

Nominal Pipe Size
NPS
(inches)

2500 psi

Diameter of
Flange
(inches)

No.
of
Bolts

Diameter of
Bolts
(inches)

Bolt
Circle
(inches)

1/2

5-1/4

4

3/4

3-1/2

3/4

5-1/2

4

3/4

3-3/4