The “current” NFPA 660 Standard for Combustible Dusts and Particulate Solids is a proposed standard that consolidates the 61, 484, 652, 654, 655, and 664 documents into a single standard.
Not long ago I met with and old friend, Siegel Fetty and his mother, Marlene. The purpose of our meeting was to talk of her brother, Lt. Siegel Hawkins. They to