Le tableau ci-dessous permet d'obtenir la correspondance entre les différentes appellations de diamètres de tuyauterie utilisées dans le domaine de la plomberie.
| Pouce |
DN |
mm |
∅ int x ∅ ext |
| 1/8" |
DN6 |
10.2 |
5 x 10 |
| 1/4" |
DN8 |
13.5 |
8 x 13 |
| 3/8" |
DN10 |
17.2 |
12 x 17 |
| 1/2" |
DN15 |
21.3 |
15 x 21 |
| 3/4" |
DN20 |
26.9 |
20 x 27 |
| 1" |
DN25 |
33.7 |
26 x 34 |
| 1"1/4 |
DN32 |
42.4 |
33 x 42 |
| 1"1/2 |
DN40 |
48.3 |
40 x 49 |
| 2" |
DN50 |
60.3 |
50 x 60 |
| 2"1/4 |
DN60 |
70 |
60 x 70 |
| 2"1/2 |
DN65 |
76.1 |
66 x 76 |
| 3" |
DN80 |
88.9 |
80 x 90 |
| 3"1/2 |
DN90 |
101.6 |
90 x 102 |
| 4" |
DN100 |
114.3 |
102 x 114 |
| 5" |
DN125 |
139.7 |
125 x 139 |
| 6" |
DN150 |
168.3 |
150 x 168 |
| 7" |
DN175 |
193.7 |
- |
| 8" |
DN200 |
219.1 |
200 x 219 |
| 9" |
DN225 |
244.5 |
- |
| 10" |
DN250 |
273 |
- |
| 12" |
DN300 |
323.9 |
- |
| 14" |
DN350 |
355.6 |
- |
| 16" |
DN400 |
406.4 |
- |
| 18" |
DN450 |
457 |
- |
| 20" |
DN500 |
506 |
- |
