This norm is based on ISO8573-1.
It defines the classes for air quality determination fro compressed air used on railway rolling stock and maintenance center.
Table 1 sold particles classes(1)
|
class |
|
|
Maximum particles diameter (µm) |
mass (mg/m3) |
|
1 |
0,1 |
0,1 |
|
2 |
1 |
1 |
|
3 |
5 |
5 |
|
4 |
15 |
8 |
|
5 |
40 |
10 |
Table 2 humidity classes
|
class |
maximum pressurised Dew point |
|
|
|
1 |
-70 |
|
2 |
-40 |
|
3 |
-20 |
|
4 |
+3 |
|
5 |
+7 |
|
6 |
+10 |
Table 3 Oil total classes (1)
|
class |
content in mg/m3 |
|
|
|
1 |
0,01 |
|
2 |
0,1 |
|
3 |
1 |
|
4 |
5 |
|
X |
25 |
(1): All values refer to :
-
Air temperature 20°C
-
Air absolute pressure 100 kPa = [1bar] (a)
The designation of the purity class of compressed air at the specified measuring point shall include the information in the order given :
Point _(point ID)____ Air of quality class A B C Where A = particles class, B = water class and C = total oil class
If one pollutant is not expressed, it must be replaced by hyphen.
http://www.boutique.afnor.org/livres-normes-solution-et-services/resultats/2f69e25f-c832-436e-8f68-e7cb291650c1 
