HALF COUPLING (ASME B16.11 -2016)

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HALF COUPLING

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

Is a standardized pipe fitting, revised from ASME B16.11-2011, designed to connect one end of a pipe to a threaded or socket-weld component.

This fitting ensures a secure and reliable connection, making it ideal for various industrial applications. Complying with ASME B16.11-2016, it meets stringent manufacturing and safety standards, providing a dependable choice for joining pipes and fittings with ease.

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

The socket’s wall thickness around its periphery must meet or exceed the listed values on average. However, in localized areas, minimum values are permissible.

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 represents the minimum length of an impeccable thread. The total length of the functional thread, comprising B and threads with fully formed roots and crests, must meet or exceed the L2 requirement (effective length of external thread) prescribed by the American National Standard for pipe threads (ANSI / 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