DN and NPS Comparison
The NPS standard is developed by North America in the 19th century. The European equivalent to NPS standard is DN (Nominal Diameter/Diamètre Nominal/Durchmesser Nach Norm), in which pipe sizes are measured in millimeters (mm).
Here Following is a comparison table for the two sets of standars.
|
Nominal Pipe Size |
Nominal Diameter |
Nominal Pipe Size |
Nominal Diameter |
Nominal Pipe Size |
Nominal Diameter |
|
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 |
Prev: Brief Introduction to Nominal Pipe Size Next: Sanitary Pumps Sealing-Packing