【管道公称直径换算表-管道规格对照表-水管规格对照表】
1、常用管道公称直径简介
公称直径采用符号“DN”表示，如果在设计图纸中采用外径表示，也应该作出管道规格对照表，表明某种管道的公称直径，壁厚。
2、管道规格对照表-水管规格对照表
|
公
称
直
径
DN |
外径(D) |
公称壁厚 |
|
A系列 |
B系列 |
Sch
5s |
Sch
10s |
Sch
20s |
LG |
Sch
20 |
Sch
30 |
STD |
Sch
40 |
Sch
60 |
XS |
Sch
80 |
Sch
100 |
Sch
120 |
Sch
140 |
Sch
180 |
|
15
20
25 |
21.3
26.9
33.7 |
18
25
32 |
1.6
1.6
1.6 |
2.1
2.1
2.8 |
2.6
2.6
3.2 |
-
-
- |
-
-
- |
-
-
- |
-
-
- |
2.9
2.9
3.2 |
-
-
- |
-
-
- |
3.6
4.0
4.5 |
-
-
- |
-
-
- |
-
-
- |
4.5
5.6
6.3 |
|
32
40
50 |
42.4
48.3
60.3 |
38
45
57 |
1.6
1.6
1.6 |
2.8
2.8
2.8 |
3.2
3.2
3.6 |
-
-
- |
-
-
3.2 |
-
-
- |
-
-
- |
3.6
3.6
4.0 |
-
-
- |
-
-
- |
5.0
5.0
5.6 |
-
-
- |
-
-
- |
-
-
- |
6.3
7.1
8.8 |
|
65
80
90 |
76.1
88.9
101.6 |
76
89
- |
2.0
2.0
2.0 |
3.0
3.0
3.0 |
3.6
4.0
4.0 |
-
-
- |
4.5
4.5
4.5 |
-
-
- |
-
-
- |
5.0
5.6
5.6 |
-
-
- |
-
-
- |
7.1
8.0
8.0 |
-
-
- |
-
-
- |
-
-
- |
10.0
11.0
12.5 |
|
100
125
150 |
114.3
139.7
168.3 |
108
133
159 |
2.0
2.9
2.9 |
3.0
3.4
3.4 |
4.0
5.0
5.0 |
-
-
- |
5.0
5.0
5.6 |
-
-
- |
-
-
- |
5.9
6.3
7.1 |
-
-
- |
-
-
- |
8.8
10.0
11.0 |
-
-
- |
11.0
12.5
14.2 |
-
-
- |
14.2
16.0
17.5 |
|
200
250
300 |
219.1
273.0
323.9 |
219
273
325 |
2.9
3.6
4.0 |
4.0
4.0
4.5 |
6.3
6.3
6.3 |
-
-
- |
6.3
6.3
6.3 |
7.1
8.0
8.8 |
-
-
- |
8.0
8.8
10.0 |
10.0
12.5
14.2 |
-
-
- |
12.5
16.0
17.5 |
16.0
17.5
22.2 |
17.5
22.2
25.0 |
20.0
25.0
28.0 |
22.2
28.0
32.0 |
|
350
400
450
500
550
600 |
355.6
406.4
457.0
508.0
559
610 |
377
426
478
529
-
630 |
4.0
4.0
4.0
5.0
5.0
5.6 |
5.0
5.0
5.0
5.6
5.6
6.3 |
-
-
- |
8.0
8.0
8.0
8.0
8.0
8.0 |
8.0
8.0
8.0
10.0
-
- |
10.0
10.0
11.0
12.5
-
- |
10.0
10.0
10.0
10.0
10.0
10.0 |
11.0
12.5
14.2
16.0
-
17.5 |
16.0
17.5
20.0
20.0
-
- |
13.0
13.0
13.0
13.0
13.0
13.0 |
20.0
22.2
25.0
28.0
30.0
32.0 |
25.8
28.5
30.0
32.0
-
- |
28.0
30.0
36.0
40.0
-
- |
32.0
36.0
40.0
45.0
-
- |
36.0
40.0
45.0
50.0
-
- |
|
650
700
750 |
660
711
762 |
-
720
- |
-
-
- |
-
-
- |
-
-
- |
8.0
8.0
8.0 |
-
-
- |
-
-
- |
10.0
10.0
10.0 |
-
-
- |
-
-
- |
13.0
13.0
13.0 |
-
-
- |
-
-
- |
-
-
- |
-
-
- |
-
-
- |
|
800
850
900 |
813
864
914 |
820
-
920 |
-
-
- |
-
-
- |
-
-
- |
8.0
8.0
8.0 |
-
-
- |
-
-
- |
10.0
10.0
10.0 |
-
-
- |
-
-
- |
13.0
13.0
13.0 |
-
-
- |
-
-
- |
-
-
- |
-
-
- |
-
-
- |
|
950
1000
1050 |
965
1016
1067 |
-
1020
- |
-
-
- |
-
-
- |
-
-
- |
8.0
8.0
8.0 |
-
-
- |
-
-
- |
10.0
10.0
10.0 |
-
-
- |
-
-
- |
13.0
13.0
13.0 |
-
-
- |
-
-
- |
-
-
- |
-
-
- |
-
-
- |
|
1100
1150
1200 |
1118
1168
1219 |
1120
-
1220 |
-
-
- |
-
-
- |
-
-
- |
8.0
8.0
8.0 |
-
-
- |
-
-
- |
10.0
10.0
10.0 |
-
-
- |
-
-
- |
13.0
13.0
13.0 |
-
-
- |
-
-
- |
-
-
- |
-
-
- |
-
- |
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