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Class II - Dusts
  • Group E - combustible metal dusts - aluminum, magnesium,
    conductivity is a hazard with use of electrical equipment
    • some metal dusts - thorium, uranium, zirconium etc... - have very low ignition temperatures and require special precautions
  • Group F - Carbonaceous Dusts - coal, charcoal, carbon black
  • Group G - Other Dusts - flour, grain, wood, plastic
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