| 英制代號 | 公稱通徑 |
鋼管外徑 |
鋼管內徑 |
1/8″ |
DN6 |
10 |
外徑－壁厚×2 |
1/4″ |
DN8 |
13.5 |
|
3/8″ |
DN10 |
17 |
|
1/2″ |
DN15 |
21.3 |
|
3/4″ |
DN20 |
26.8 |
|
1″ |
DN25 |
33.5 |
|
1 1/4″ |
DN32 |
42.3 |
|
1 1/2″ |
DN40 |
48 |
|
2″ |
DN50 |
60 |
|
2 1/2″ |
DN65 |
75.5 |
|
3″ |
DN 80 |
88.5 |
|
4″ |
DN 100 |
114 |
|
5″ |
DN 125 |
140 |
|
6″ |
DN 150 |
165 |
