Explosion Hazard Classification and Testing Methods in France for Gases, Vapors, Liquids, Dusts and Solids.
Pineau JP; Chaineaux J; Movilliat P; Ronchail G
Proceedings of the International Symposium on the Explosion Hazard Classification of Vapors, Gases, and Dusts, National Materials Advisory Board, Publication NMAB-447 1987:205-244
Methods used in France for classifying the explosion hazard of gases, vapors, liquids, dusts, and solids were discussed. Regulations concerning the use of explosive substances and preparations in France were considered. Tests used to classify explosive substances and preparations were based on thermal sensitivity and mechanical sensitivity to shock and friction. Methods for classifying flammable substances were based on determining the ignition sensitivity, ignition temperature, and minimum ignition energy to sparks or electrostatic discharges from electrical equipment and circuits and plastic surfaces. The available tests for characterizing self ignition were regarded as being inadequate. Testing the insulation resistance of materials used in plastic enclosures was discussed. Determining the electrical conductivity of dust deposits was considered. Methods for assessing the explosion severity and transmissibility of gases, vapors, and dusts was described. Characterizing dust explosion propagation risks was considered. The authors conclude that although methods exist for determining the explosion potential of flammable gases, vapors, and dusts, they do not constitute an unambiguous method for quantifying risk. There are no tests currently available in France that determine exactly the capability of a dust cloud to explode. The authors suggest that ignition temperature be measured in the Godbert-Greenwald furnace and explosion severity be measured in a 1 cubic meter vessel.
Legislation; Laboratory-testing; Standards; Dust-explosions; Combustible-gases; Industrial-safety; Electrical-hazards; Explosion-prevention;
Proceedings of the International Symposium on the Explosion Hazard Classification of Vapors, Gases, and Dusts, National Materials Advisory Board, Publication NMAB-447