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Classification and Test Methods for Gases, Vapors, and Dusts in the Netherlands.
Proceedings of the International Symposium on the Explosion Hazard Classification of Vapors, Gases, and Dusts, National Materials Advisory Board, Publication NMAB-447 1987:245-252
The classification of gases, vapors, and dusts in the Netherlands according to their explosive potential was discussed. Standards governing building and installing gas or dust explosion proof electrical equipment in the Netherlands were described. Testing laboratories in the Netherlands were discussed. There was no official laboratory in the Netherlands to perform tests on flammable gases and dusts. Laboratories in other European Common Market countries have been used to certify electrical equipment. An independent laboratory, the Prins Maurits Laboratorium, has been used for research on flammable gases and dusts. Methods for assessing the explosion hazard of flammable gases and vapors were discussed. These included measuring the flash point, the maximum allowable oxygen concentration, maximum explosion overpressure, maximum rate of pressure increase, and laminar flame spread. The ignitability of gases and vapors was evaluated by determining the minimum ignition energy and ignition temperature. Methods for evaluating the explosion potential of dusts were considered. These emphasized practical aspects rather than theoretical dust properties. Differentiating between explosive and nonexplosive dusts has been done in a one cubic meter (m3) vessel using a very strong ignition source. The maximum rate of pressure rise in a 1m3 volume, lower explosion limit, and minimum ignition temperature and spark ignition energy were measured. Future developments in dust explosion research were discussed.
Laboratory-testing; Dust-explosions; Combustible-gases; Explosive-atmospheres; Industrial-safety; Electrical-equipment;
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