公称通径

Inside nominal diameter

DN

公称压力

Nominal pressure

MPa

UPVC管材

公称外径dn

Nominal outer diameter of UPVC pipes

S₂

UPVC管壁厚及偏差

Wall thickness of UPVC pipes and deviations

S₁

S₃

S₂+ S₃≈S₄

S₄允许偏差

Tolerance

预留长度

Reserved

length

L₁

15

1.0

20

0.5

2.3

+0.5

0

3

3.5

+0.5

0

44

20

1.0

25

0.5

2.5

+0.5

0

3

3.5

+0.5

0

47

25

1.0

32

0.5

2.5

+0.5

0

3

3.5

+0.5

0

50

32

1.0

40

0.5

2.7

+0.5

0

3

3.5

+0.5

0

55

40

1.0

50

0.5

3.1

+0.6

0

3

3.5

+0.5

0

56

50

1.0

63

0.5

3.6

+0.7

0

3

3.5

+0.5

0

58

65

1.0

75

0.5

3.8

+0.7

0

3

3.5

+0.5

0

66

80

1.0

90

0.5

4.3

+0.9

0

3

3.5

+0.5

0

72

100

1.0

110

0.5

4.8

+1.0

0

3

3.5

+0.6

0

82

125

1.0

140

0.5

6.1

+1.2

0

3

3.5

+0.6

0

96

150

1.0

160

0.5

7.9

+1.4

0

4

4.5

+0.7

0

106

200

1.0

225

0.5

9.7

+1.5

0

4

4.5

+0.7

0

140

250

1.0

280

0.5

12.2

+1.7

0

5.5

6

+0.8

0

166

300

1.0

315

0.5

13.6

+1.9

0

5.5

6

+0.8

0

184

350

1.0

355

0.5

14.8

+2.0

0

5.5

6

+0.8

0

204

400

1.0

400

0.5

15.3

+2.1

0

5.5

6

+0.8

0

226

500

1.0

500

0.5

19.1

+2.1

0

6.5

7

+0.8

0

280

600

1.0

630

0.5

24.1

+2.1

0

6.5

7

+0.8

0

350

注：复合管材长度L一般为4m或6m，也可由供需双方协商确定。

Note:The length of the compounded pipes is generally 4m or 6m, which can be determined upon negotiations between both parties.