Deflagration Hazard : A situation where deflagrable wood dust is normally in suspension or can be placed in suspension at concentrations at or above the minimum explosible concentration (MEC)
NFPA 664 Standard for the Prevention of Fires and Explosions in Wood Processing and Woodworking Facilities, 2002 ed. (Std: Prev of Fr and Explo in Wood Procss and Woodworking Fcilty - Amer) {339 NFC}