Flammable dust is classified by its conductivity into three types: conductive dust (III C), non-conductive dust (III B) and flammable flyings (III A). Common flammable dust atmospheres include metal grinding and polishing, spray coating, grain and oil processing, plastic manufacturing, feed production and other workplaces.

Dust explosion-proof certification typically adopts explosion protection types such as intrinsically safe type, encapsulated type, pressurized type and dust ignition-proof enclosure type, based on factors including product structure, electrical parameters and installation methods.