公称外径

dn，mm

平均外径

S5

S4

S3.2

S2.5

S2

de,min，mm

de,max，mm

公称壁厚en，mm

12

12.0

12.3

-

-

-

2.0

2.4

16

16.0

16.3

-

2.0

2.2

2.7

3.3

20

20.0

20.3

2.0

2.3

2.8

3.4

4.1

25

25.0

25.3

2.3

2.8

3.5

4.2

5.1

32

32.0

32.3

2.9

3.6

4.4

5.4

6.5

40

40.0

40.4

3.7

4.5

5.5

6.7

8.1

50

50.0

50.5

4.6

5.6

6.9

8.3

10.1

63

63.0

63.6

5.8

7.1

8.6

10.5

12.7

75

75.0

75.7

6.8

8.4

10.3

12.5

15.1

90

90.0

90.9

8.2

10.1

12.3

15.0

18.1

110

110.0

111.0

10.0

12.3

15.1

18.3

22.1

125

125.0

126.2

11.4

14.0

17.7

20.8

25.1

140

140.0

141.3

12.7

15.7

19.2

23.3

28.1

160

160.0

161.5

14.6

17.9

21.9

26.6

32.1