To limit the probability that accumulations of combustible dusts will be ignited by hot surfaces in the building or on machinery, or by any ignition source in the presence of a cloud of dust generated by shocks, vibrations, a primary explosion or by dust removal operations, which could lead to a fire or to a primary or secondary explosion, which could lead to harm to persons.
To limit the probability that sparks or heat from cleaning or dust removal equipment will ignite accumulations of combustible dusts or clouds of dust, which could lead to harm to persons.
To limit the probability that the dispersal of combustible dusts into the atmosphere of the building will lead to an ignitable or hazardous accumulation of dust, which could lead to a fire or explosion, which could lead to harm to persons.