Normal pipe size
inch

DN

Outside Diameter of Flange

Outside Diameter of Raised Face

Thickness of Flange Min.

Thickness Lap Joint Min.

Diameter of Hub

Hub Diameter Beginning of Chamfer Welding Neck

Length Through Hub

Thread Length Threaded Flange Min.

Bore

Drilling

Bolting

Slip-on, Threaded, Socket welding

Lap Joint

Welding Neck

Slip-on, Socket welding Min.

Lapped. Min.

Welding Neck, Socket Welding

Depth of Socket

Bolt Circle Diameter

Number of Bolt Holes

Diameter of Bolt Holts

Diameter of Bolts

Machine Bolt Length

Stud Bolt Length

2mm Raised Face

2mm Raised Face

Ring Joint

O

R

t_f

t_f

X

A_h

Y

Y

Y

T

B

B

B

D

W

1/2

15

90

34.9

9.6

11.2

30

21.3

14

16

46

16

22.2

22.9

15.8

10

60.3

4

15.88

12.70

50

55

3/4

20

100

42.9

11.2

12.7

38

26.7

14

16

51

16

27.7

28.2

20.9

11

69.9

4

15.88

12.70

50

65

1

25

110

50.8

12.7

14.3

49

33.4

16

17

54

17

34.5

34.9

26.6

13

79.4

4

15.88

12.70

55

65

75

1 1/4

32

115

63.5

14.3

15.9

59

42.2

19

21

56

21

43.2

43.7

35.1

14

88.9

4

15.88

12.70

55

70

85

1 1/2

40

125

73.0

15.9

17.5

65

48.3

21

22

60

22

49.5

50.0

40.9

16

98.4

4

15.88

12.70

65

70

85

2

50

150

92.1

17.5

19.1

78

60.3

24

25

62

25

61.9

62.5

52.5

17

120.7

4

19.05

15.88

70

85

95

2 1/2

65

180

104.8

20.7

22.3

90

73.0

27

29

68

29

74.6

75.4

62.7

19

139.7

4

19.05

15.88

75

90

100

3

80

190

127.0

22.3

23.9

108

88.9

29

30