ANSI B16.5 Class 400 Lap Joint Flanges Approximate Weight 2-570 Lbs

Nominal Pipe Size

Outside Diameter (O)

Thickness (T)

Length Thru Hub (Y)

Hub Diameter (X)

Radius (r)

Bore (B)

Approximate Weight (lbs)

Bolt Circle (C)

Number of Holes

Diameter of Holes

 1/2

3.75

0.56

1.38

0.88

0.13

0.9

2

2.63

4

0.63

 3/4

4.63

0.63

1.69

1

0.13

1.11

3

3.25

4

0.75

1

4.88

0.69

2

1.06

0.13

1.38

4

3.5

4

0.75

1 1/4

5.25

0.81

2.5

1.13

0.19

1.72

5

3.88

4

0.75

1 1/2

6.13

0.88

2.88

1.25

0.25

1.97

7

4.5

4

0.88

2

6.5

1

3.63

1.44

0.31

2.46

9

5

8

0.75

2 1/2

7.5

1.13

4.13

1.63

0.31

2.97

12

5.88

8

0.88

3

8.25

1.25

5

1.81

0.38

3.6

15

6.63

8

0.88

3 1/2

9

1.38

5.5

1.94

0.38

4.1

20

7.25

8

1

4

10

1.38

2

5.75

0.44

4.6

25

7.88

8

1

5

11

1.5

2.13

7

0.44

5.69

29

9.25

8

1

6

12.5

1.63

2.25

8.13

0.5

6.75

42

10.63

12

1

8

15

1.88

2.69

10.25

0.5

8.75

64

13

12

1.13

10

17.5

2.13

4

12.63

0.5

10.92

110

15.25

16

1.25

12

20.5

2.25

4.25

14.75

0.5

12.92

150

17.75

16

1.38

14

23

2.38

4.63

16.75

0.5

14.18

205

20.25

20

1.38

16

25.5

2.5

5

19

0.5

16.19

260

22.5

20

1.5

18

28

2.63

5.38

21

0.5

18.2

315

24.75

24

1.5

20

30.5

2.75

5.75

23.13

0.5

20.25

385

27

24

1.63

22

33

2.88

6

25.25

0.5

22.25

455

29.25

24

1.75

24

36

3

6.25

27.63

0.5

24.25

570

32

24

1.88