公称
口径

钢管外径

内衬塑料
壁厚

镀锌后
再外覆塑
壁厚

3PE粉未
涂层
最小厚度

外覆
胶粘剂层
厚度

2PE、3PE

M级钢管
壁厚

L级钢管
壁厚

防腐层最小厚度

Minimum
Thickness of
Anticorrosive
Coating

Nominal
Size

Outside Diameter
of Steel Tube

Wall
Thickness
of PE
Lining

Wall
Thickness
of Outer
Pe
Coating

Minimum
Thickness of powder
Coating

Thickness
of outer
Glue layer

Wall
Thickness
of medium
Class
Steel tube

Wall
Thickness
of Light
Class
Steel tube

普通级

加厚级

Nomal
Class

Reinforced
Class

mm

mm

公差

mm

mm

mm

mm

mm

mm

mm

mm

15

21.3

±0.5 mm

1.5

0.5

0.08

0.17
～
0.25

1.8

2.5

2.8

2.2

20

26.8

1.5

0.6

1.8

2.5

2.8

2.3

25

33.5

1.5

0.7

1.8

2.5

3.2

2.6

32

42.3

1.5

0.8

1.8

2.5

3.5

2.6

40

48.0

1.5

1.0

1.8

2.5

3.5

2.9

50

60.0

±1%

1.5

1.1

1.8

2.5

3.8

2.9

65

75.5

1.5

1.1

1.8

2.5

4.0

3.2

80

88.5

2.0

1.2

1.8

2.5

4.0

3.2

100

114.0

2.0

1.3

1.8

2.5

4.0

3.6

125

140.0

2.0

1.4

2.0

2.7

4.0

150

165.0

2.5

1.5

2.0

2.7

4.5

200

219.1

±0.75%

2.5

2.0

2.0

2.7

5.0

250

273.0

3.0

2.0

2.0

2.7

6.0

300

323.9

3.0

2.2

2.2

2.9

7.0

350

377.0

3.5

2.2

2.2

2.9

8.0

400

426.0

3.5

2.2

2.2

2.9

8.0

450

480.0

3.5

2.2

2.2

2.9

8.0

500

530.0

±1%

3.5

2.5

2.5

3.2

8.0

600

630.0

3.5

2.5

2.5

3.2

8.0

700

711.0

3.5

2.5

2.5

3.2

9.0

800

813.0

3.5

3.0

3.0

3.7

10.0

900

914.0

3.5

3.0

3.0

3.7

11.0

1000

1016.0

3.5

3.0

3.0

3.7

12.0

公差

Tolerance

DN≤150±0.2
DN>200-0.5

±12.5%

+不限
－8%