This standard specifies the cleanliness rating of compressed air with respect to particles, moisture and oil, regardless of the type of compressed air source.
JIS B 8392-1:2003 history
2012JIS B 8392-1:2012 Compressed air.Part 1: Contaminants and purity classes
2003JIS B 8392-1:2003 Compressed air -- Part 1: Contaminants and purity classes
2000JIS B 8392-1:2000 Compressed air for general use -- Part 1: Contaminants and quality classes