Oil Tubing Coupling (API Spec 5CT & 5B)

API Non-upset Tubing Coupling-Dimension, Tolerances and Masses

Label 1

Outside Diameter mm

Minimum Length N^L mm

Diameter of recess mm

Width of bearing face mm

Maximum bearing face diameter mm

Mass

kg

Steel

Grade

1.050

26.67

80.96

28.27

1.59

30.00

0.23

J55/K55

L80,C90

C95

N80-1/ N80-Q

T95,P110

Q125

1.315

33.40

82.55

35.00

2.38

37.80

0.38

1.660

42.16

88.90

43.76

3.18

47.17

0.59

1.900

48.26

95.25

49.86

1.59

52.07

0.56

2-3/8

60.32

107.95

61.93

4.76

66.68

1.28

2-7/8

73.02

130.18

74.63

4.76

80.98

2.34

3-1/2

88.90

142.88

90.50

4.76

98.42

3.71

4

101.60

146.05

103.20

4.76

111.12

4.35

4-1/2

114.30

155.58

115.90

4.76

123.19

4.89

a The size designation for the coupling is the same as the size designation for the pipe on which the coupling is used

b Tolerance on outside diameter W^b, +/-1%

API external-upset tubing coupling--Dimensions, tolerances and masses

Label 1

Size

Outside Diameter

Minimum Length mm

Diameter of recess mm

Width of Bearing Regular mm

Maximum bearing face diameter mm

Mass kg

Steel Grade

Outside Diameter mm

Regular Bevel W^b mm

Special Clearance W^c mm

Special bevel mm

Special clearance mm

Regular

Special clearance

1.050

26.67

42.16

-

82.55

35.00

2.38

37.80

-

0.38

-

J55/K55 L80,C90

C95

N80-1/ N80-Q

T95,P110

Q125

1.315

33.40

48.26

-

88.90

38.89

2.38

42.77

-

0.57

-

1.660

42.16

55.88

-

95.25

47.63

3.18

50.95

-

0.68

-

1.900

48.26

63.50

-

98.42

54.76

3.18

58.34

-

0.84

-

2-3/8

60.32

77.80

73.91

123.82

67.46

3.97

71.83

69.90

1.55

1.07

2-7/8

73.02

93.17

87.88

133.35

80.16

5.56

85.88

83.24

2.40

1.55

3-1/2

88.90

114.30

106.17

146.05

96.85

6.35

104.78

100.71

4.10

2.38

4

101.60

127.00

-

152.40

109.55

6.35

117.48

-

4.82

-

4-1/2

114.30

141.30

-

158.75

122.25

6.35

130.96

-

6.05

-

a .The size designation for the coupling is the same as the size designation for the pipe on which the coupling is used.

b .Tolerance on outside diameter Wb,+/-1%;

c .Tolerance on outside diameter Wc, +/-0.38 mm