爆炸性环境–；第10-2部分:区域分类–；爆炸性粉尘环境

[中文适用范围]： 本部分IEC 60079涉及爆炸性粉尘环境和可燃粉尘层的识别和分类，以便正确评估这些区域内的点火源。 本标准将爆炸性粉尘环境和可燃粉尘层分开处理。第4章描述了爆炸性粉尘云的区域分类，其中粉尘层作为可能的释放源之一。第7章描述了粉尘层点火的其他一般考虑因素。 本标准的示例基于工厂实施的有效内务管理系统，以防止粉尘层积聚。在没有有效内务管理的情况下，区域分类包括粉尘层可能形成的爆炸性粉尘云。 当可燃纤维或飞絮可能造成危险时，也可遵循本标准的原则。 本标准适用于在正常大气条件下（见注1）可能存在爆炸性粉尘环境或可燃粉尘层风险的情况。 注1：大气条件包括压力和温度在101.3 kPa（1013 mbar）和20°C（293 K）参考水平上下的变化，只要这些变化对可燃材料的爆炸性能影响可以忽略不计。 本标准不适用于： - 地下矿区； - 由于存在混合混合物而可能产生风险的区域； - 不需要大气氧气燃烧的爆炸性粉尘，如自燃物质、推进剂、烟火、弹药、过氧化物、氧化剂、水反应元素或化合物，或其他类似材料； - 超出本标准异常概念范围的灾难性故障（见注1）； - 粉尘释放易燃或有毒气体引起的任何风险。 本标准不适用于由于存在易燃气体或蒸气而可能产生的危险，但其原则可用于评估混合混合物（另见IEC 60079-10-1）。 注2：关于混合混合物的附加指南见附录C。 本标准不考虑火灾或爆炸后随之而来的损害影响。 [外文原描述]： IEC 60079-10-2:2015 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60079-10-2:2015 is concerned with the identification and classification of areas where explosive dust atmospheres and combustible dust layers are present, in order to permit the proper assessment of ignition sources in such areas. In this standard, explosive dust atmospheres and combustible dust layers are treated separately. In Clause 4, area classification for explosive dusts clouds is described, with dust layers acting as one of the possible sources of release. In Clause 7 other general considerations for dust layers are described. The examples in this standard are based on a system of effective housekeeping being implemented in the plant to prevent dust layers from accumulating. Where effective housekeeping is not present, the area classification includes the possible formation of explosive dust clouds from dust layers. The principles of this standard can also be followed when combustible fibres or flyings might cause a hazard. This standard is intended to be applied where there can be a risk due to the presence of explosive dust atmospheres or combustible dust layers under normal atmospheric conditions. Please refer to the foreword of the document for a detailed listing of the significant technical changes from the previous edition. Keywords: explosive dust atmospheres, combustible dust layers, ignition hazard