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Activities in Japan for Classification of Flammable Vapors, Gases, and Dusts in Japan.
Proceedings of the International Symposium on the Explosion Hazard Classification of Vapors, Gases, and Dusts, National Materials Advisory Board, Publication NMAB-447 1987:253-274
Classification of flammable vapors, gases, and dusts in Japan according to their explosibility was discussed. Technical recommendations made by the Research Institute of Industrial Safety of the Ministry of Labor pertaining to flammable vapors and gases and dusts and parameters such as the maximum experimental safe gap (MESG), minimum ignition current, and ignition temperature were considered. Recommendations pertaining to dust related parameters such as explosion intensity, electrical conductivity, and ignition temperature were discussed. Technical recommendations of the Japanese Industrial standard for ignition temperature and MESG of flammable vapors and gases were considered. Recent research papers dealing with the explosion hazard classification of gases, vapors, and dusts were surveyed. Properties of vapors, gases, and dusts to be considered in developing criteria for improving assessments of explosion hazards in places where electrical equipment is used were discussed. These include ignitability, ignition energy, ignition temperature, quenching, pressure buildup, flame temperature, laminar burning velocity, flame front growth rate, turbulence, and the possibility of a deflagration to detonation transition occurring.
Combustible-gases; Explosive-dusts; Standards; Industrial-safety; Explosion-prevention; Electrical-equipment; Explosive-atmospheres; Ignition-sources; Laboratory-testing;
Proceedings of the International Symposium on the Explosion Hazard Classification of Vapors, Gases, and Dusts, National Materials Advisory Board, Publication NMAB-447
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division