标准摘要
[中文适用范围]: 本标准的 IEC 60079 第 10-2 部分涉及识别和分类存在爆炸性粉尘大气和可燃粉尘层的区域,以便对此类区域中的点火源进行适当评估。在本标准中,爆炸性粉尘大气和可燃粉尘层是分开处理的。在第 4 章中,描述了爆炸性粉尘云的区域分类,粉尘层作为可能的释放源之一。在第 7 章中描述了粉尘层的其他一般考虑事项。本标准中的示例基于在工厂实施有效的清洁系统以防止粉尘层积聚的情况。如果不存在有效的清洁,则区域分类包括粉尘层可能形成爆炸性粉尘云的情况。当可燃纤维或飞尘可能造成危害时,也可遵循本标准的原则。本标准适用于存在爆炸性粉尘大气或可燃粉尘层且有危险的情况,适用于正常大气条件(见注 1)。 注 1 大气条件包括压力和温度在 101,3 kPa(1 013 mbar)和 20 °C(293 K)参考水平上下方的变化,前提是这些变化对可燃材料的爆炸性能没有显著影响。 它不适用于: - 地下矿山区域; - 不需要大气氧进行燃烧的火药粉尘,如自燃物质、推进剂、烟火、弹药、过氧化物、氧化剂、与水反应的元素或化合物或其他类似材料; - 超出本标准所处理的不正常概念的灾难性故障; - 粉尘释放有毒气体引起的任何风险。 本标准不适用于可能存在易燃气体或蒸气危险的区域,但原则可用于评估混合混合物(另见 IEC 60079-10-1)。 注 2 混合混合物的额外指导见附录 C。 本标准不考虑火灾或爆炸后造成的后果损害。 [外文原描述]: 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 hazards
英文名称Explosive atmospheres - Part 10-2: Classification of areas - Explosive dust atmospheres