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FLANGE - ORIFICE, WELD NECK, ANSI CLASS 400, B16.36 (IN)
Bolt circle diameters are 1/8 inch larger than bolt diameter.
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  • Dimensions to ASME B16.36 - Orifice Flanges

  • Bolt circle diameters are 1/8 inch larger than bolt diameter.

  • All dimensions except "Thickness of Flange C sizes 1" are the same as a Weld Neck.

  • Approximate weight is based on a orifice flange union which is a set of flanges, plate not included.

Pipe Size (NPS)

Outside Diameter of Flange A

Diameter of Raised Face B

Thickness of Flange C

Diameter of Bore D

Diameter of Hub at Weld H

Diameter of Hub at Base J

Length of Hub K

Number of Bolt Holes

Diameter of Bolt Holes

Bolt Circle Diameter P

Approx. Weight Per Union (lb)

1/2

-

-

-

-

-

-

-

-

-

-

-

3/4

-

-

-

-

-

-

-

-

-

-

-

1

4 7/8

2

1 1/2

*

1.315

2 1/8

2 7/16

4

3/4

3 1/2

18

1 1/4

5 1/4

2 1/2

1 1/2

*

1.660

2 1/2

2 5/8

4

3/4

3 7/8

20

1 1/2

6 1/8

2 7/8

1 1/2

*

1.900

2 3/4

2 3/4

4

7/8

4 1/2

25

2

6 1/2

3 5/8

1 1/2

*

2.375

3 5/16

2 7/8

8

3/4

5

27

2 1/2

7 1/2

4 1/8

1 1/2

*

2.875

3 15/16

3 1/8

8

7/8

5 7/8

35

3

8 1/4

5

1 1/2

*

3.500

4 5/8

3 1/4

8

7/8

6 5/8

43

3 1/2

-

-

-

-

-

-

-

-

-

-

-

4

10

6 3/16

1 3/8

*

4.500

5 3/4

3 1/2

8

1

7 7/8

82

5

11

7 5/16

1 1/2

*

5.563

7

4

8

1

9 1/4

101

6

12 1/2

8 1/2

1 5/8

*

6.625

8 1/8

4 1/16

12

1

10 5/8

136

8

15

10 5/8

1 7/8

*

8.625

10 1/4

4 5/8

12

1 1/8

13

213

10

17 1/2

12 3/4

2 1/8

*

10.750

12 5/8

4 7/8

16

1 1/4

15 1/4

309

12

20 1/2

15

2 1/4

*

12.750

14 3/4

5 3/8

16

1 3/8

17 3/4

429

14

23

16 1/4

2 3/8

*

14.00

16 3/4

5 7/8

20

1 3/8

20 1/4

554

16

25 1/2

18 1/2

2 1/2

*

16.00

19

6

20

1 1/2

22 1/2

705

18

28

21

2 5/8

*

18.00

21

6 1/2

24

1 1/2

24 3/4

863

20

30 1/2

23

2 3/4

*

20.00

23 1/8

6 5/8

24

1 5/8

27

1066

22

33

25 1/4

2 7/8

*

22.00

25 1/4

6 3/4

24

1 3/4

29 1/4

1120

24

36

27 1/4

3

*

24.00

27 5/8

6 7/8

24

1 7/8

32

1555


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