What is DN?
DN stands for ‘Diameter Nominal’.
Put simply, it is a rough translation of mm from imperial sizes, assuming that an inch is 25mm.
We refer to a 12″ flange as DN300, when in fact it is 304mm.
Please use the table below for your reference and if you have any other questions, please ask the Just Valves team.
| ½” | DN15 |
| ¾” | DN20 |
| 1″ | DN25 |
| 1¼” | DN32 |
| 1½” | DN40 |
| 2″ | DN50 |
| 2½” | DN65 |
| 3″ | DN80 |
| 4″ | DN100 |
| 5″ | DN125 |
| 6″ | DN150 |
| 8″ | DN200 |
| 10″ | DN250 |
| 12″ | DN300 |
| 14″ | DN350 |
| 15″ | DN375 |
| 16″ | DN400 |
| 18″ | DN450 |
| 20″ | DN500 |
| 24″ | DN600 |