scope:

This part of ISO 8573 specifies purity classes of compressed air in respect of particles, water and oil independent of the location in the compressed air system for which the air is specified or measured. This part of ISO 8573 provides general information about contaminants in compressed air systems as well as links to other parts of the ISO 8573 series either to measure compressed air purity or to specify compressed air purity requirements. Further to the above mentioned contaminants of particles, water and oil, this part of ISO 8573 also identifies gaseous and microbiological contaminants. Guidance is given on restrictions on application of this International Standard in Annex A.