1.1 ,Purpose. The purpose of this test method is to provide standard test methods for characterizing the “,explosibility”, of dust clouds in two ways, first by determining if a dust is “,explosible,”, meaning a cloud of dust dispersed in air is capable of propagating a deflagration, which could cause a flash fire or explosion, or, if explosible, determining the degree of “,explosibility,”, meaning the potential explosion hazard of a dust cloud as characterized by the dust explosibility parameters, maximum explosion pressure, P_max, maximum rate of pressure rise, (dP/dt)_max, and explosibility index, K_St.