NFPA 497 化学工艺区易燃液体、气体、蒸气分类及电气安装危险性分类
日期:2012-02-09 16:42
re not intended to be all-inclusive.
1.1.3 This recommended practice applies to chemical process areas. As used in this document, a chemical process area could be a large, integrated chemical process plant or it could be a part of such a plant. It could be a part of a manufacturing facility where flammable gases or vapors, flammable liquids, or combustible liquids are produced or used in chemical reactions, or are handled or used in certain unit operations such as mixing, filtration, coating, s
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