Limiting Oxygen Concentration LOC

The limiting oxygen concentration (LOC) is the maximum oxygen concentration of a flammable dust with air and an inert gas for which there is no self-sustaining propagation of flames for any fuel concentration. Fuel concentration is varied by varying the concentration of inert gas. The determination takes place under standardized test conditions (vid. [34]). [Pg.46]

Dust type Median of the particle diameter in pm Maximum O2 concentration on inerting with N2 in vol% [Pg.46]

Alternatives to Arresters Alternatives to the use of flame arresters include fast-ac ting isolation valves, vapor suppression systems, velocity-type devices in which gas velocity is designed to exceed flashback velocity, and control of the flammable mixture (NFPA 69 standard, Explosion Prevention Systems ). The latter alternative frequently involves reduction of oxygen concentration to less than the limiting oxygen concentration (LOC) of the gas stream. [Pg.2305]

Limiting Oxygen Concentration and Inerting Table 6-2 Limiting Oxygen Concentrations (LOCs) (volume percent oxygen concentration above which combustion can occur)1 239... [Pg.239]

The limiting oxygen concentration (LOC) is estimated by reading the oxygen concentration at the intersection of the stoichiometric line and a horizontal line drawn through the LFL. This is equivalent to the equation... [Pg.571]

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