v1rev 12013-07-04IEC 60079-10-2:2009, Annex C

level of housekeeping types

0112/2///61360_4#AAF874

coded values of the frequency and effectivity of cleaning from dust reducing risks of fire and explosions in accordance with IEC 60079-10-2

value list

Terms3#

AAF824good

dust layers are kept to negligible thickness, or are non-existent, irrespective of the grade of release

AAF825fair

dust layers are not negligible but are short-lived (less than one shift)

AAF826poor

dust layers are not negligible and persist for more than one shift