HALF COUPLING

HALF COUPLING

ASME B16.11 -2016 (Revision of ASME B16.11-2011)

Half Coupling Fittings (ASME B 1611)

Dimensions in millimeters

Socket Welding

DN

Nom.
Pipe
Size

B(2)

C(1)

D

F

j
(Min)

(Avg)

(Min)

3000Lb

6

1/8

10.8

3.18

3.18

6.9

16.0

9.5

8

1/4

14.2

3.78

3.30

9.3

16.0

9.5

10

3/8

17.6

4.01

3.50

12.6

17.5

9.5

15

1/2

21.8

4.67

4.09

15.8

22.5

9.5

20

3/4

27.2

4.90

4.27

21.0

24.0

12.5

25

1

33.9

5.69

4.98

26.7

28.5

12.5

32

1-1/4

42.7

6.07

5.28

35.1

30.0

12.5

40

1-1/2

48.8

6.35

5.54

40.9

32.0

12.5

50

2

61.2

6.93

6.04

52.5

41.0

16.0

65

2-1/2

73.9

8. 76

7.67

62.7

 43.0

16.0

80

3

89.8

9.52

8.30

77.9

44.5

16.0

100

4

115.2

10.69

9.35

102.3

48.0

19.0

6000Lb

6

1/8

10.8

3.96

3.43

    4.0

 16.0

9.5

8

1/4

14.2

4.60

4.01

6.4

16.0

9.5

10

3/8

17.6

5.03

4.37

9.2

17.5

9.5

15

1/2

21.8

5.97

5.18

11.8

22.5

9.5

20

3/4

27.2

6.96 

6.04

15.6

24.0

12.5

25

1

33.9

7.92

6.93

20.7

28.5

12.5

32

1-1/4

42.7

7.92

6.93

29.5

30.0

12.5

40

1-1/2

48.8

8.92

7.80

34.0

32.0

12.5

50

2

61.2

10.92

9.50

42.9

41.0

16.0

9000Lb

15

1/2

21.8

9.35

8.18

6.4

22.5

9.5

20

3/4

27.2

9.78

8.56

11.1

24.0

12.5

25

1

33.9

11.38

9.96

15.2

28.5

12.5

32

1-1/4

42.7

12.14

10.62

22.8

30.0

12.5

40

1-1/2

48.8

12.70

11.12

28.0

32.0

12.5

50

2

61.2

13.84

12.12

38.2

41.0

16.0

Average of socket Wall Thickness around periphery shall be no less than listed values. The minimum values are permitted in localized areas

Dimensions in millimeters.

Threaded

DN

Nom Pipe Size

Length of Thread.
(Min)

W

D

B(*)

   L2(*)

3000Lb

6

1/8

6.4

6.7

32

16

8

1/4

8.1

10.2

35

19

10

3/8

9.1

10.4

38

22

15

1/2

10.9

13.6

48

28

20

3/4

12.7

13.9

51

35

25

1

14.7

17.3

60

44

32

1-1/4

17.0

18.4

67

57

40

1-1/2

17.8

18.4

79

64

50

2

19.0

19.2

86

76

65

2-1/2

23.6

28.9

92

92

80

3

25.9

30.5

108

108

100

4

27.7

33.0

121

140

6000Lb

6

1/8

6.4

6.7

32

22

8

1/4

8.1

10.2

35

25

1 0

3/8

9.1

10.4

38

32

15

1/2

10.9

13.6

48

38 

20

3/4

12.7

13.9

51

44

25

1

14.7

17.3

60

57

32

1-1/4

17.0

18.4

67

64

40

1-1/2

17.8

18.4

79

76 

50

2

19.0

19.2

86

92

65

2-1/2

23.6

28.9

92

108

80

3

25.9

30.5

108

127

100

4

27.7

33.0

121

159

Dimension B is minimum length of perfect thread. The length of useful thread (B plus threads with fully formed root and, flat crests) shall not be less than L2 (effective length of external thread) required by American National Standard for pipe threads (ANSI I ASME B1.20.1) .

DIMENSIONAL TOLERANCE OF ASME B16.11
ASME B16.11-2016 (Unit : mm)

Item

Type of
pipe fitting

Size

DN

6 to 8

10 to 20

25 to 50

65 to 100

NPS

1/8 to 1/4

3/8 to 3/4

1 to 2

2-1/2 to 4

Bore diameter of socket (B)

All types of
pipe fittings

+0.4
—0.0

+0.4
—0.0

+0.4
—0.0

+0.4
—0.0

Bore diameter of fitting (D)

±0.7

±0.7

±0.7

±1.4

Concentricity of bore (X)

+ 0.8

Coincidence of axes (Y)

1/200 Max

Center to bottom of socket (A)

45° 90° Elbow
Tee Cross

±1.0

±1.5

±2.0

±2.5

Bottom to bottom of socket (E)

Full Coupling

±1.5

± 3.0

±4.0

±5.0

Bottom to socket to opposite face (F)

Half Coupling

±1.5

±3.0

±4.0

±5.0