ขนาดและขนาดของท่อสาย API

NPS

O. D.

ความหนาของผนังเล็กน้อย

DN

นิ้ว

มม.

SCH

5S

SCH

10S

SCH

10

SCH

20

SCH

30

SCH

40

SCH

60

SCH

80

SCH

100

SCH

120

SCH

140

SCH

160

STD

Xs

xxs

50

2″

60.3

1.65

2.77

–

–

–

3.91

–

5.54

–

–

–

8.74

3.91

5.54

11.07

65

2-1/2″

73

2.11

3.05

–

–

–

5.16

–

7.01

–

–

–

9.53

5.16

7.01

14.02

80

3″

88.9

2.11

3.05

–

–

–

5.49

–

7.62

–

–

–

11.13

5.49

7.52

15.24

90

3-1/2″

101.6

2.11

3.05

–

–

–

5.74

–

8.08

–

–

–

–

5.74

8.08

–

100

4″

114.3

2.11

3.05

–

–

–

6.02

–

8.58

–

11.13

–

13.49

6.02

8.56

17.12

125

5″

141.3

2.77

3.4

–

–

–

6.55

–

9.53

–

12.7

–

15.88

6.55

9.53

18.05

150

6″

168.3

2.77

3.4

–

–

–

7.11

–

10.97

–

14.27

–

18.26

7.11

10.97

21.95

200

8″

219.1

2.77

3.76

–

6.35

7.04

8.18

10.31

12.7

15.09

18.26

20.62

23.01

8.18

12.7

22.23

250

10″

273.1

3.4

4.19

–

6.35

7.8

9.27

12.7

15.09

18.26

21.44

25.4

28.58

9.27

12.7

25.4

300

12″

323.9

3.96

4.57

–

6.35

8.38

10.31

14.27

17.48

21.44

25.4

28.58

33.32

9.53

12.7

25.4

350

14″

355.5

3.96

4.78

6.35

7.92

9.53

11.13

15.09

19.05

23.83

27.79

31.75

35.71

9.53

12.7

–

400

16″

406.4

4.19

4.78

6.35

7.92

9.53

12.7

16.66

21.44

26.19

30.96

36.53

40.49

9.53

12.7

–

450

18″

457.2

4.19

4.78

6.35

7.92

11.13

14.27

19.05

23.83

39.36

34.93

39.67

45.24

–

–

–

500

20″

508

4.78

5.54

6.35

9.53

12.7

15.09

20.62

26.19

32.54

38.1

44.45

50.01

–

–

–

550

22″

558.8

4.78

5.54

6.35

9.53

12.7

–

22.23

28.58

34.93

41.28

47.63

53.98

–

–

–

600

24″

609.6

5.54

6.35

6.35

9.53

14.27

17.48

24.61

30.96

38.89

46.02

52.37

59.54

–

–

–