Dimensions for Class 150 Flanges

(inches)

O

Q

R

X

No. and** Dia. of Bolt Holes

Bolt Circle Dia

YY

H

J

Y

B

R

YY

BB

Z

1/2

3.50

.44

1.38

1.19

4-0.62

2.38

1.88

.84

.62

.62

.88

.12

.62

.90

.38

3/4

3.88

.50

1.69

1.50

4-0.62

2.75

2.06

1.05

.82

.62

1.09

.12

.62

1.11

.44

1

4.25

.56

2.00

1.94

4-0.62

3.12

2.19

1.32

1.05

.69

1.36

.12

.69

1.38

.50

11/4

4.62

.62

2.50

2.31

4-0.62

3.50

2.25

1.66

1.38

.81

1.70

.19

.81

1.72

.56

11/2

5.00

.68

2.88

2.56

4-0.62

3.88

2.44

1.90

1.61

.88

1.95

.25

.88

1.97

.62

2

6.00

.75

3.62

3.06

4-0.75

4.75

2.50

2.38

2.07

1.00

2.44

.31

1.00

2.46

.69

21/2

7.00

.88

4.12

3.56

4-0.75

5.50

2.75

2.88

2.47

1.12

2.94

.31

1.12

2.97

.75

3

7.50

.94

5.00

4.25

4-0.75

6.00

2.75

3.50

3.07

1.19

3.57

.38

1.19

3.60

.81

31/2

8.50

.94

5.50

4.81

8-0.75

7.00

2.81

4.00

3.55

1.25

40.70

.38

1.25

4.10

4

9.00

.94

6.19

5.31

8-0.75

7.50

3.00

4.50

4.03

1.31

4.57

.44

1.31

4.60

5

10.00

.94

7.31

6.44

8-0.88

8.50

3.50

5.56

5.05

1.44

5.66

.44

1.44

5.69

6

11.00

1.00

8.50

7.56

8-0.88

9.50

3.50

6.63

6.07

1.56

6.72

.50

1.56

6.75

8

13.50

1.12

10.62

9.69

8-0.88

11.75

4.00

8.63

7.98

1.75

8.72

.50

1.75

8.75

10

16.00

1.19

12.75

12.00

12-1.00

14.25

4.00

10.75

10.02

1.94

10.88

.50

1.94

10.92

12

19.00

1.25

15.00

14.38

12-1.00

17.00

4.50

12.75

12.00

2.19

12.88

.50

2.19

12.92

14

21.00

1.38

16.25

15.75

12-1.12

18.75

5.00

14.00

To Be
Specified
by
Purchaser

2.25

14.14

.50

3.12

14.18

16

23.50

1.44

18.50

18.00

16-1.12

21.25

5.00

16.00

2.50

16.16

.50

3.44

16.19

18

25.00

1.56

21.00

19.88

16-1.25

22.75

5.50

18.00

2.69

18.18

.50

3.81

18.20

20

27.50

1.69

23.00

22.00

20-1.25

25.00

5.69

20.00

2.88

20.2

.50

4.06

20.25

24

32.00

1.88

27.25

26.12

20-1.38

29.50

6.00

24.00

3.25

24.25

.50

4.38

24.25