公称通径

外径

不锈钢无缝管

DN

D

PN10/1.0MPa

PN16/1.6MPa

PN25/2.5MPa

PN40/4.0MPa

PN64/6.4MPa

10

14

2

2

2

2

2.5

15

18

2

2.5

2.5

2.5

2.5

20

25

2

2.5

2.5

2.5

2.5

25

32

2.5

2.5

2.5

2.5

3

32

38

2.5

2.5

2.5

2.5

3

40

45

2.5

2.5

2.5

2.5

3

50

57

2.5

3

3

3

3.5

65

76

2.5

3

3

3

4

80

89

2.5

3

3

3.5

4.5

100

108

3

3

3.5

4

5

125

133

3

3

3.5

4.5

6

150

159

3.5

3.5

4

5

7

200

219

3.5

3.5

4.5

6

8

250

273

3.5

4

5

7

10

300

325

4

4.5

6

8

11

350

377

4

5

6

9

13

400

426

4.5

5

7

10

14