NFPA 484-2019 Standard for Combustible Metals

NFPA 484-2019 Standard for Combustible Metals. 3.3.48* Noncombustible. In the form used and under the conditions anticipated, will not ignite, burn, support combus‐ tion, or release flammable vapors when subjected to fire or heat. 3.3.49 Passivation. A controlled process by which a barrier coating is placed on the surface of the metal to inhibit reac‐ tion. 3.3.49.1 Oxygen Passivation. A controlled process that expo‐ ses the metal powder to oxygen with the goal of forming an oxide of the metal on the particle surface. 3.3.50 Paste. A mixture consisting of a liquid and suspended particles or flakes. 3.3.50.1 Aluminum Paste. Aluminum flake pigment homo‐ geneously incorporated in a solid or liquid carrier in such a way so as to have a nonflowing product without a free- flowing liquid. N 3.3.51* Pneumatic Conveying System. An equipment system that transfers a controlled flow of solid particulate material from one location to another using air or other gases as the conveying medium, and that is comprised of the following components: a material feeding device; an enclosed ductwork, piping, or tubing network; an air–material separator; and an air-moving device. [652, 2019] N 3.3.52 Portable AMS (Dust Collector). A portable machine designed to collect airborne dust produced from a dust- generating operation. N 3.3.53 Portable Vacuum Cleaner. A portable machine for collecting settled fugitive dust from floors and other surfaces. 3.3.58* Recycling. Processing, reprocessing, resizing, sorting, sifting, or staging of scrap materials formerly in the process stream or in use, that no longer serve their original and/or intended purpose, but continue to have resale value. 3.3.59 Replacement-in-Kind. A replacement that satisfies the design specifications of the replaced item. [652, 2019] 3.3.60 Ribbon. A manufactured product or a continuous chip resulting from secondary processing (e.g., boring, grinding, milling, turning, etc.), of a ductile material. 3.3.60.1* Magnesium Ribbon. Magnesium metal that is less than 3.2 mm ( 1 ∕ 8 in.) in two dimensions or less than 1.3 mm ( 1 ∕ 20 in.) in single dimension, also considered a powder for the purpose of this standard. N 3.3.61* Risk Assessment. An assessment of the likelihood, vulnerability, and magnitude of the incidents that could result from exposure to hazards. [1250, 2015] 3.3.62 Screening Test. For the purposes of this standard, a test performed to determine whether a material or mixture exhibits fire-, explosion-, or water-reactivity-related characteris‐ tics.NFPA 484 pdf download.