Are all dusts potentially explosive?

From Powder Bulk Solids:

Explosion Venting/Suppression QandA

  Are all dusts potentially explosive? How can I tell if any of the dust we create during the manufacturing of our powdered laundry detergents is unsafe? Is there a listing of consultants or companies that can be hired to evaluate our particular situation?

Answered July 9th, 2013 by Expert: Dr. Gerd Mayer
1. No. Some are some aren’t. In order to determine whether a dust is potentially explosive, it must be tested for a variety of parameters, including Kst, Pmax, MIE. Any dust with a Kst value of over 0 is considered potentially explosive.  NFPA Standard 654 requires that dust be tested and that a risk analysis be conducted.
2. The dust must be tested for the factors noted above.
3. There is no particular list per se. There are companies that will do risk analysis, including insurance companies and there are manufacturers’ representatives that will review your situation and make recommendations. OSHA will also come in to do an evaluation of your facility if you’d like. And there are project engineers that will work with you to redesign/retrofit an existing process to comply with NFPA standards.

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