Análise quantitativa da extensão de áreas classificadas

• Ano de defesa: 2011
• Autor(a) principal: Otsuka, Aroldo Hitoshi
• Orientador(a): Paixão, Ana Eleonora Almeida
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Sergipe
• Programa de Pós-Graduação: Pós-Graduação em Engenharia Química
• País: BR
• Palavras-chave em Português: Áreas classificadas; Atmosfera explosiva; Segurança do trabalho; ABNT NBR IEC 6009-10
• Palavras-chave em Inglês: Hazardous areas; Explosive atmosphere; Safety; ABNT NBR IEC 6009-10
• Área do conhecimento CNPq: CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA
• Link de acesso: https://ri.ufs.br/handle/riufs/5056

Classified areas are regions with explosive atmospheres and the purpose of characterizing it is to design or estimate its extent to prevent the risk of ignition in an industrial plant. We will demonstrate that the generic use of the method of classification of areas by default or standardized figure without proper technical justification is questioned by many authors and professionals specialized in the subject that warn about the subjective form with which the subject is treated and may cause distortions in the risk assessment. The objective of this study is to present a quantitative assessment of these extensions, and compare the results between the two methodologies. For this work, we used bibliographical, and through simulation, made sure the calculations for estimating them. Used fluid flow equations suggested in the work of Macmillan (1998), in order to determine the flow of the leak and the distance from the source until the concentration of LII (lower limit of flammability), axis x. To validate them, they used data from the experiments presented by Cox (1989). And finally, the results were compared classified areas extension for leak scenario proposed by the ABNT IEC 60079-10 (2006) with those obtained by drainage equations. The results demonstrated that simply transpose the distance of 1 meter radius, in the form of a sphere, from the seal of the valve that controls the flow of propane as standard, does not guarantee the accuracy of the extension of its classified area. .