IEC 60079-10-1:20 20 CMV包含官方标准及其注释版本。注释版本为您提供了一种快速简单的方法来比较IEC 60079-10-1:2020版3.0和之前的IEC 60079-10-1:2015版2.0之间的所有更改。此外，还提供了IEC SC 31J专家的意见，以解释最相关变更的原因。 IEC 60079-10-1:20 20涉及可能出现易燃气体或蒸汽危险的区域的分类，然后可用作支持危险区域使用的设备的正确设计、建造、操作和维护的基础。 它旨在应用于由于存在与空气混合的易燃气体或蒸汽而可能存在点火危险的地方，但不适用于: a)易受火灾影响的地雷；b)爆炸物的加工和制造； c)超出本标准中处理的正常概念的灾难性故障或罕见故障； d)用于医疗目的的房间； e)住宅处所； f)由于可燃粉尘或可燃飞料的存在而可能产生危险，但这些原理可用于混合混合物的评估。 易燃雾可以与易燃蒸气同时形成或存在。在这种情况下，严格应用本文件中的细节可能不合适。当由于高闪点而不被认为是危险的液体在压力下释放时，也可能形成易燃雾。在这些情况下，本文件中给出的分类和细节不适用。 就本文件而言，区域是指三-维度区域或空间。 大气条件包括101、3 kPa(1013毫巴)和20°C(293 K)参考水平以上和以下的变化，条件是这些变化对易燃物质的爆炸性质影响微不足道。 在任何地点，无论大小，除了与设备相关的点火源之外，可能还有许多点火源。在这种情况下，需要采取适当的预防措施来确保安全。本标准适用于其他点火源的判断，但在某些应用中，也可能需要考虑其他安全措施。例如，在考虑动火作业许可时，较大的距离可能适用于明火。 本文件不考虑爆炸性环境点火的后果，除非区域很小，如果发生点火，后果可以忽略不计。IEC 60079-10-1第三版取消并取代了2015年发布的第二版，构成技术修订，更多详情请参见前言。

IEC 60079-10-1:2020 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 60079-10-1:2020 edition 3.0 and the previous IEC 60079-10-1:2015 edition 2.0. Futhermore, comments from IEC SC 31J experts are provided to explain the reasons of the most relevant changes.

IEC 60079-10-1:2020 is concerned with the classification of areas where flammable gas or vapour hazards may arise and may then be used as a basis to support the proper design, construction, operation and maintenance of equipment for use in hazardous areas.
It is intended to be applied where there may be an ignition hazard due to the presence of flammable gas or vapour, mixed with air, but it does not apply to:
a) mines susceptible to firedamp;
b) the processing and manufacture of explosives;
c) catastrophic failures or rare malfunctions which are beyond the concept of normality dealt with in this standard;
d) rooms used for medical purposes;
e) domestic premises;
f) where a hazard may arise due to the presence of combustible dusts or combustible flyings but the principles may be used in assessment of a hybrid mixture.
Flammable mists may form or be present at the same time as flammable vapour. In such case the strict application of the details in this document may not be appropriate. Flammable mists may also form when liquids not considered to be a hazard due to the high flash point are released under pressure. In these cases the classifications and details given in this document do not apply.
For the purpose of this document, an area is a three-dimensional region or space.
Atmospheric conditions include variations above and below reference levels of 101,3 kPa (1 013 mbar) and 20 °C (293 K), provided that the variations have a negligible effect on the explosion properties of the flammable substances.
In any site, irrespective of size, there may be numerous sources of ignition apart from those associated with equipment. Appropriate precautions will be necessary to ensure safety in this context. This standard is applicable with judgement for other ignition sources but in some applications other safeguards may also need to be considered. E.g. larger distances may apply for naked flames when considering hot work permits.
This document does not take into account the consequences of ignition of an explosive atmosphere except where a zone is so small that if ignition did occur it would have negligible consequences.
This third edition of IEC 60079-10-1 cancels and replaces the second edition, published in 2015, and constitutes a technical revision, see foreword for further details.