400# Flange dimensions

 

flange_dimensions



Dimensions for Class 400 Flanges

Nom. Pipe Size

(inches)

O

Q*

R

X

No. and**
Dia of
Bolt Holes

Bolt
Circle
Dia.

YY*

H

J

Y*

B

r

YV

BB

C

T

1/2

3.75

0.56

1.38

1.50

4-0.62

2.62

2.06

0.84

To

Be

S
p
e
c
i
f
i
e
d

by

P
u
r
c
h
a
s
e
r

0.88

0.88

0.12

0.88

0.90

0.93

0.62

3/4

4.62

0.62

1.69

1.88

4-0.75

3.25

2.25

1.05

1.00

1.09

0.12

1.00

1.11

1.14

0.62

1

4.88

0.69

2.00

2.12

4-.075

3.50

2.44

1.32

1.06

1.36

0.12

1.06

1.38

1.41

0.69

11/4

5.25

0.81

2.50

2.50

4-0.75

3.88

2.62

1.66

1.12

1.70

0.19

1.12

1.72

1.75

0.81

11/2

6.12

0.88

2.88

2.75

4-0.88

4.50

2.75

1.90

1.25

1.95

0.25

1.25

1.97

1.99

0.88

2

6.50

1.00

3.62

3.31

8-0.75

5.00

2.88

2.38

1.44

2.44

0.31

1.44

2.46

2.50

1.12

21/2

7.50

1.12

4.12

3.94

8-0.88

5.88

3.12

2.88

1.62

2.94

0.31

1.62

2.97

3.00

1.25

3

8.25

1.25

5.00

4.62

8-0.88

6.62

3.25

3.50

1.81

3.57

0.38

1.81

3.60

3.63

1.38

31/2

9.00

1.38

5.50

5.25

8-1.00

7.25

3.38

4.00

1.94

4.07

0.38

1.94

4.10

4.13

1.56

4

10.00

1.38

6.19

5.75

8-1.00

7.88

3.50

4.50

2.00

4.57

0.44

2.00

4.60

4.63

1.44

5

11.00

1.50

7.31

7.00

8-1.00

9.25

4.00

5.56

2.12

5.66

0.44

2.12

5.69

5.69

1.69

6

12.50

1.62

8.50

8.12

12-1.00

10.62

4.06

6.63

2.25

6.72

0.50

2.25

6.75

6.75

1.81

8

15.00

1.88

10.62

10.25

12-1.12

13.00

4.62

8.63

2.69

8.72

0.50

2.69

8.75

8.75

2.00

10

17.50

2.12

12.75

12.62

16-1.25

15.25

4.88

10.75

2.88

10.88

0.50

4.00

10.92

10.88

2.19

12

20.50

2.25

15.00

14.75

16-1.38

17.75

5.38

12.75

3.12

12.88

0.50

4.25

12.92

12.94

2.38

14

23.00

2.38

16.25

16.75

20-1.38

20.25

5.88

14.00

3.31

14.14

0.50

4.62

14.18

14.19

2.50

16

25.5

2.50

18.5

19.00

20-1.50

22.50

6.00

16.00

3.69

16.16

0.50

5.00

16.19

16.19

2.69

18

28.00

2.62

21.00

21.00

24-1.50

24.75

6.50

18.00

3.88

18.18

0.50

5.38

18.2

18.19

2.75

20

30.50

2.75

23.00

23.12

24-1.62

27.00

6.62

20.00

4.00

20.20

0.50

5.75

20.25

20.19

2.88

24

36.00

3.00

27.25

27.62

24-1.88

32.00

6.88

24.00

4.50

24.25

0.50

6.25

24.25

24.19

3.25

 

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