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Seamless

Brief Introduction:

A kind of line pipe without welding or joints is called seamless line pipe, which is manufactured to API 5L and relative standards.

Seamless Line pipe is more uniform in consistency unlike rolled and welded pipe that has been seam welded. Seamless line pipe can also, usually, withstand higher operating pressures and temperatures than weld pipe so it is commonly preferred for use in high pressure systems. Fluid flow through seamless line pipe is generally less turbulent than welded pipe also.


Dimension

Wall Thickness Sch(mm)

NPS
mm

NPS
inch

OD
mm

20

30

40

60

80

100

120

160

50

2

60.3

　

　

　

　

　

　

　

8.74

65

2.5

73

　

　

　

　

　

　

　

9.53

80

3

88.9

　

　

5.49

7.14

7.62

　

　

11.13

90

3.5

101.6

　

　

5.74

7.14

8.08

8.5

11.13

13.49

100

4

114.3

　

4.78

6.02

7.14

8.56

8.5

11.13

13.49

125

5

141.3

　

5.56

6.55

7.92

9.53

11.13

12.7

15.88

150

6

168.3

　

5.56

7.11

8.74

10.97

12.7

14.27

18.26

200

8

219.1

6.35

7.04

8.18

10.31

12.7

15.09

18.26

23.01

250

10

273.1

6.35

7.8

9.27

12.7

15.09

18.26

21.44

　

300

12

323.8

6.35

8.38

10.31

14.27

17.48

21.44

25.4

　

350

14

355.6

7.92

9.53

11.13

15.09

19.05

23.83

　

　

400

16

406.4

7.92

9.53

12.7

16.66

21.44

　

　

　

450

18

457

7.92

11.13

14.27

19.05

23.88

　

　

　

500

20

508

9.53

12.7

15.09

20.62

　

　

　

　

550

22

559

9.53

12.7

15.88

22.23

　

　

　

　

600

24

610

9.53

14.27

17.48

24.61

　

　

　

　

650

26

660

12.7

14.27

　

　

　

　

　

　

700

28

711

12.7

15.88

　

　

　

　

　

　

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