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CLASS 600 FLANGES
ANSI B16.5 FORGED FLANGES   

        Unit: Inch
Normal Pipe Size Outside diam. O.D.of Raised Face Diam. of Hub at Base Thickness BORE LENGTH THRU HUB Diam. of Hub at bevel Fillet Radius of  Lap Joint Thread length
Welding Neck Socket Welding Slip-on Socket Welding Lap Joint Counter Bore Min.Thread Min. Welding Neck Slip-on Threaded Socket Welding Lap Joint
D G X t B1 B2 B3 B T1 T2 T3 A R Q
1/2

3/4

1

 3.75

4.62

4.88

 1.38

1.69

2.00

 1.50

1.88

2.12

 0.56

0.62

0.69

0.88

1.09

1.36

0.90

1.11

1.38

0.93

1.14

1.41

2.06

2.25

2.44

0.88

1.00

1.06

0.88

1.00

1.06

0.84

1.05

1.32

0.12

0.12

0.12

0.62

0.62

0.69

1-1/4

1-1/2

2

 5.25

6.12

6.50

 2.50

2.88

3.62

 2.50

2.75

3.31

0.81

0.88

1.00

1.70

1.95

2.44

1.72

1.97

2.46

1.75

1.99

2.50

2.62

2.75

2.88

1.12

1.25

1.44

1.12

1.25

1.44

1.66

1.90

2.38

0.19

0.25

0.31

0.81

0.88

1.12

2-1/2

3

3-1/2

 7.50

8.25

9.00

 4.12

5.00

5.50

3.94

4.62

5.25

1.12

1.25

1.38

2.94

3.57

4.07

2.97

3.60

4.10

3.00

3.63

4.13

3.12

3.25

3.38

1.62

1.81

1.94

1.62

1.81

1.94

2.88

3.50

4.00

0.31

0.38

0.38

1.25

1.38

1.56

4

5

6

 10.75

13.00

14.00

 6.19

7.31

8.50

6.00

7.44

8.75

1.50

1.75

1.88

4.57

5.66

6.72

4.60

5.69

6.75

4.63

5.69

6.75

4.00

4.50

4.62

2.12

2.38

2.62

2.12

2.38

2.62

4.50

5.56

6.63

0.44

0.44

0.50

1.62

1.88

2.00

8

10

12

 16.50

20.00

22.00

 10.62

12.75

15.00

10.75

13.50

15.75

2.19

2.50

2.62

8.72

10.88

12.88

8.75

10.92

12.92

8.75

10.88

12.94

5.25

6.00

6.12

3.00

3.38

3.62

3.00

4.38

4.62

8.63

10.75

12.75

0.50

0.50

0.50

2.25

2.56

2.75

14

16

18

 23.75

27.00

29.25

 16.25

18.50

21.00

17.00

19.50

21.50

2.75

3.00

3.25

14.14

16.16

18.18

14.18

16.19

18.20

14.19

16.19

18.19

6.50

7.00

7.25

3.69

4.19

4.62

5.00

5.50

6.00

14.00

16.00

18.00

0.50

0.50

0.50

2.88

3.06

3.12

20

24 

 32.00

37.00

 23.00

27.25

24.00

28.25

3.50

4.00

20.20

24.25

20.25

24.25

20.19

24.19

7.50

8.00

5.00

5.50

6.50

7.25

20.00

24.00

0.50

0.50

3.25

3.62