ANSI B16.5 FORGED FLANGES

Class 1500 Ring Joint Flanges

Unit: mm

Nominal Pipe Size

Pitch Diam of Ring and Groove

width of Ring

Height of Ring

Width of fiat on octagonal

Width of Groove

Depth of Groove

Diameter of Raised face for ring joint of lapped

Ring Number

Approximate distance between flanges of ring joints when rings is compressed

Oval

Octagona

E (L)

K (Min)

42.9

8.0

14.3

12.7

5.2

8.7

6.4

65.0

R13

4.1

50.8

8.0

14.3

12.7

5.2

8.7

6.4

73.2

R16

4.1

60.3

8.0

14.3

12.7

5.2

8.7

6.4

82.6

R18

4.1

1 ¼

72.2

11.1

17.5

15.9

7.7

11.9

7.9

101.6

R21

3.0

1 ½

82.6

11.1

17.5

15.9

7.7

11.9

7.9

114.3

R23

3.0

101.6

11.1

17.5

15.9

7.7

11.9

7.9

133.4

R26

3.0

2 ½

111.1

12.7

19.1

17.5

8.7

13.5

9.5

149.4

R28

3.0

127.0

12.7

19.1

17.5

8.7

13.5

9.5

168.1

R32

3.0

157.2

15.9

22.2

20.7

10.5

16.7

11.1

203.2

R38

4.1

190.5

19.1

25.4

23.8

12.3

19.8

12.7

241.3

R42

4.1

228.6

19.1

25.4

23.8

12.3

19.8

12.7

279.4

R47

4.1

279.4

22.2

28.6

27.0

14.8

23.0

14.3

339.9

R51

4.8

342.9

28.6

36.5

34.9

19.8

30.2

17.5

425.5

R55

6.4

406.4

31.8

39.7

38.1

22.3

33.4

17.5

495.3

R60

7.9

Notes:

Unless otherwise specified by the customer, Ring type Joint Flanges will be furnished in accordance with these details.

the depth of groove is added to the monimum Flange thickness.

* Raised face "L" is equal to groove dimension "E" but is not subject to tolerances for "E"

* A plus tolerance of 3/64 in, for heights B and H is permitted providing the variation in the height of any given ring does not

exceed 1/64 in, throughout its entire cirkcumference.

dimension "R" is max.

Radius "r" is 1/16" for ring widths 7/8" and less and 3/32" for ring widths 1" (25.4mm) and over.