Bolting Dimensions for 150 lb. Flanges

Nom

Diam

Diam

Nbr.

Length of Studs 1/16" Raised Face

Bolt

Pipe

of Bolt

of

of

Length

Size

Circle

Bolts

Bolts

0.5

2.375

0.5

4

2.25

1.75

0.75

2.75

0.5

4

2.25

2

1

3.125

0.5

4

2.5

2

1.25

3.5

0.5

4

2.5

2.25

1.5

3.875

0.5

4

2.75

2.25

2

4.75

0.625

4

3

2.75

2.5

5.5

0.625

4

3.25

3

3

6

0.625

4

3.5

3

3.5

7

0.625

8

3.5

3

4

7.5

0.625

8

3.5

3

5

8.5

0.75

8

3.75

3.25

6

9.5

0.75

8

3.75

3.25

8

11.75

0.75

8

4

3.5

10

14.25

0.875

12

4.5

3.75

12

17

0.875

12

4.5

4

14

18.75

1

12

5

4.25

16

21.25

1

16

5.25

4.5

18

22.75

1.125

16

5.75

4.75

20

25

1.125

20

6

5.25

22

27.25

1.25

20

6.5

5.5

24

29.5

1.25

20

6.75

5.75

26

31.75

1.25

24

7

6

30

36

1.25

28

7.25

6.25

34

40.5

1.5

32

8

7

36

42.75

1.5

32

8.25

7

42

49.5

1.5

36

8.75

7.5

Stud lengths for lap joint flanges are equal to lengths shown plus the thickness of two laps of the stub ends.

Bolting arrangements for 125 lb. cast iron flanges are the same as shown for 150 lb. steel flanges.