The Limiting Oxygen Concentration (LOC) is the minimum oxygen concentration required to sustain flame propagation (deflagration) in a dust cloud. The LOC serves as a fundamental parameter for designing exhaust systems to prevent dust explosions.
ASTM E2931-13(Reapproved 2019) Standard Test Method for Limiting Oxygen (Oxidant) Concentration of Combustible Dust Clouds
EN 14034-4:2004+A1：2011 Determination of explosion characteristics of dust clouds-Part 4: Determination of the limiting oxygen concentration LOC of dust clouds