Noncombustible Particulate Solid : Any noncombustible solid material composed of distinct particles or pieces, regardless of size, shape, or chemical composition
NFPA 91 Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids, 2004 ed. http://iepi.neu.edu.cn/Download/Standards/NFPA/NFP A%2091-2010%20Standard%20for%20Exhaust%20Systems%2 0for%20Air%20Conveying%20of%20Vapors,%20Gases,%20M ists,%20and%20Noncombustible%20Particulate%20Solid s.pdf, (Std: Exhaust Sys for Air Conveying of Vapors, Gas, Mists, and Noncomb Particulate Solids - Amer) {237 NFC}