API 5CT Casing

DN

O. D.

Weight

W. T.

End Machining Form

Steel Grade

in

mm

lb/ft

kg/m

in

mm

H40

J55

L80

N80

C90

P110

K55

T95

4 1/2

4.500

114.3

9.5

14.14

0.205

5.21

PS

PS

–

–

–

–

10.5

15.63

0.224

5.69

–

PSB

–

–

–

–

11.6

17.26

0.250

6.35

–

PSLB

PLB

PLB

PLB

PLB

13.5

20.09

0.290

7.37

–

–

PLB

PLB

PLB

PLB

15.1

22.47

0.337

9.56

–

–

–

–

–

PLB

5

5.000

127

11.5

17.11

0.220

5.59

–

PS

–

–

–

–

13

19.35

0.253

6.43

–

PSLB

–

–

–

–

15

22.32

0.296

7.52

–

PSLB

PLB

PLB

PLBE

PLB

18

26.79

0.362

9.19

–

–

PLB

PLB

PLBE

PLB

21.4

31.85

0.437

11.1

–

–

PLB

PLB

PLB

PLB

23.2

34.53

0.478

12.14

–

–

–

–

PLB

–

24.1

35.86

0.500

12.7

–

–

–

–

PLB

–

5 1/2

5.500

139.7

14

20.83

0.244

6.2

PS

PS

–

–

–

–

15.5

23.07

0.275

6.98

–

PSLB

–

–

–

–

17

25.3

0.304

7.72

–

PSLB

PLB

PLB

PLBE

PLB

20

29.76

0.361

9.17

–

–

PLB

PLB

PLBE

PLB

23

34.23

0.415

10.54

–

–

PLB

PLB

PLBE

PLB

26.8

39.88

0.500

12.7

–

–

–

–

–

–

29.7

44.2

0.562

14.27

–

–

–

–

–

–

32.6

48.51

0.625

15.88

–

–

–

–

–

–

35.3

52.53

0.687

17.45

–

–

–

–

–

–

38

56.55

0.750

19.05

–

–

–

–

–

–

40.5

60.27

0.812

20.62

–

–

–

–

–

–

43.1

64.14

0.875

22.22

–

–

–

–

–

–

6 5/8

6.625

168.28

20

29.76

0.288

7.32

PS

PSLB

–

–

–

–

24

35.72

0.352

8.94

–

PSLB

PLB

PLB

PLBE

PLB

28

41.67

0.417

10.59

–

–

PLB

PLB

PLBE

PLB

32

47.62

0.475

12.06

–

–

PLB

PLB

PLBE

PLB

7

7.000

177.8

17

25.3

0.231

5.87

PS

–

–

–

–

–

20

29.76

0.272

6.91

PS

PS

–

–

–

–

23

34.23

0.317

8.05

–

PSLB

PLB

PLB

PLBE

–

26

38.69

0.362

9.19

–

PSLB

PLB

PLB

PLBE

PLB

29

43.16

0.408

10.36

–

–

PLB

PLB

PLBE

PLB

32

47.62

0.453

11.51

–

–

PLB

PLB

PLBE

PLB

35

52.09

0.498

12.65

–

–

PLB

PLB

PLBE

PLB

38

56.55

0.540

13.72

–

–

PLB

PLB

PLBE

PLB

42.7

63.54

0.625

15.88

–

–

–

–

–

–

46.4

69.05

0.687

17.45

–

–

–

–

–

–

50.1

74.56

0.750

19.05

–

–

–

–

–

–

53.6

79.77

0.812

20.62

–

–

–

–

–

–

57.1

84.97

0.875

22.22

–

–

–

–

–

–

7 5/8

7.625

193.68

24

35.72

0.300

7.62

PS

–

–

–

–

–

26.4

39.29

0.328

8.33

–

PSLB

PLB

PLB

PLBE

PLB

29.7

44.2

0.375

9.52

–

–

PLB

PLB

PLBE

PLB

33.7

50.15

0.430

10.92

–

–

PLB

PLB

PLBE

PLB

39

58.05

0.500

12.7

–

–

PLB

PLB

PLBE

PLB

42.8

63.69

0.562

14.27

–

–

PLB

PLB

PLB

PLB

45.3

67.41

0.595

15.11

–

–

PLB

PLB

PLB

PLB

47.1

70.09

0.625

15.88

–

–

PLB

PLB

PLB

PLB

51.2

76.19

0.687

17.45

–

–

–

–

–

–

55.3

80.3

0.750

19.05

–

–

–

–

–

–

8 5/8

8.625

219.08

24

35.72

0.264

6.71

–

PS

–

–

–

–

28

41.62

0.304

7.72

PS

–

–

–

–

–

32

47.62

0.352

8.94

PS

PSLB

–

–

–

–

36

53.57

0.400

10.16

–

PSLB

PLB

PLB

PLBE

PLB

40

59.53

0.450

11.43

–

–

PLB

PLB

PLBE

PLB

44

65.48

0.500

12.7

–

–

PLB

PLB

PLBE

PLB

49

72.92

0.557

14.15

–

–

PLB

PLB

PLBE

PLB

9 5/8

9.625

244.48

32.3

48.07

0.312

7.92

PS

–

–

–

–

–

36

53.57

0.352

8.94

PS

PSLB

–

–

–

–

40

59.53

0.395

10.03

–

PSLB

PLB

PLB

PLBE

–

43.5

64.73

0.435

11.05

–

–

PLB

PLB

PLBE

PLB

47

69.94

0.472

11.99

–

–

PLB

PLB

PLBE

PLB

53.5

79.62

0.545

13.84

–

–

PLB

PLB

PLBE

PLB

58.4

86.91

0.595

15.11

–

–

PLB

PLB

PLB

PLB

59.4

88.4

0.609

15.47

–

–

–

–

–

–

64.9

96.58

0.672

17.07

–

–

–

–

–

–

70.3

104.62

0.734

18.64

–

–

–

–

–

–

75.6

112.5

0.797

20.24

–

–

–

–

–

–

10 3/4

10.750

273.05

32.75

48.74

0.279

7.09

PS

–

–

–

–

–

40.5

60.27

0.350

8.89

PS

PSB

–

–

–

–

15.5

67.71

0.400

10.16

–

PSB

–

–

–

–

51

75.9

0.450

11.43

–

PSB

PSB

PSB

PSBE

PSB

55.5

82.59

0.495

12.57

–

–

PSB

PSB

PSBE

PSB

60.7

90.33

0.545

13.84

–

–

–

–

PSBE

PSB

65.7

97.77

0.595

15.11

–

–

–

–

PSB

PSB

73.2

108.93

0.672

17.07

–

–

–

–

–

–

79.2

117.86

0.734

18.64

–

–

–

–

–

–

85.3

126.94

0.797

20.24

–

–

–

–

–

–

11 3/4

11.750

42

62.5

0.333

8.46

PS

–

–

–

–

–

47

69.94

0.375

20.24

–

–

–

–

–

–

54

80.36

0.435

8.46

–

–

–

–

–

–

60

89.29

0.489

9.53

–

–

–

–

–

–

65

96.73

0.534

11.05

–

–

–

–

–

–

71

105.66

0.582

14.42

–

–

–

–

–

–

13 3/8

13.375

339.73

48

71.43

0.330

8.38

PS

–

–

–

–

–

54.5

81.1

0.380

9.65

–

PSB

–

–

–

–

61

90.78

0.430

10.92

–

PSB

–

–

–

–

68

101.19

0.480

12.19

–

PSB

PSB

PSB

PSB

PSB

72

107.15

0.514

13.06

–

–

PSB

PSB

PSB

PSB

16

16.000

406.4

65

96.73

0.375

9.53

PS

–

–

–

–

–

75

111.61

0.438

11.13

–

PSB

–

–

–

–

84

125.01

0.495

12.57

–

PSB

–

–

–

–

109

162.21

0.656

16.66

–

P

P

P

–

P

18 5/8

18.625

473.08

87.5

130.21

0.435

11.05

PS

PSB

–

–

–

–

20

20.000

508

94

139.89

0.438

11.13

PSL

PSLB

–

–

–

–

106.5

158.49

0.500

12.7

–

PSLB

–

–

–

–

133

197.93

0.635

16.13

–

PSLB

–

–

–

–

P——Plain；S——Short-thread；L——Long-thread；B——Buttress thread；E——Extreme thread