What is the difference between INCH and DN
2020/11/01 23:42:33
Nominal Pipe Size (NPS) is based on inches, and DN (diamètre nominal/nominal diameter) in millimetres.
ISO 6708 norm defines Nomimal Diameter for pipe components.
| Nominal Pipe Size | Nominal Diameter | Nominal Pipe Size | Nominal Diameter | Nominal Pipe Size | Nominal Diameter |
| NPS | DN | NPS | DN | NPS | DN |
| [inches] | [mm] | [inches] | [mm] | [inches] | [mm] |
| 1/8" | 6 | 6 | 150 | 48 | 1200 |
| 1/4" | 8 | 8 | 200 | 52 | 1300 |
| 3/8" | 10 | 10 | 250 | 56 | 1400 |
| 1/2" | 15 | 12 | 300 | 60 | 1500 |
| 3/4" | 20 | 14 | 350 | 64 | 1600 |
| 1" | 25 | 16 | 400 | 68 | 1700 |
| 1-1/4" | 32 | 18 | 450 | 72 | 1800 |
| 1-1/2" | 40 | 20 | 500 | 76 | 1900 |
| 2" | 50 | 24 | 600 | 80 | 2000 |
| 2-1/2" | 65 | 28 | 700 | 88 | 2200 |
| 3" | 80 | 32 | 800 | 96 | 2400 |
| 3-1/2" | 90 | 36 | 900 | 104 | 2600 |
| 4" | 100 | 40 | 1000 | 112 | 2800 |
| 4-1/2" | 115 | 42 | 1050 | 120 | 3000 |
| 5" | 125 | 44 | 1100 | 128 | 3200 |
