爆炸性环境 - 第38部分：地下矿山中的爆炸性环境用设备和部件

[中文适用范围]： 本《最终草案国际标准》为正式出版物发布前最多6周的预览版本，在其表决期（2026年6月5日至2026年7月17日）内可供销售。现购买该FDIS，除正式出版物外，还将自动获赠最终出版物的修订版。 ISO/IEC 80079-38:2026 为双标识标准，适用于爆炸性环境中用于采矿机械的爆炸防护要求。该机械可为单一设备，也可由多个防爆设备及防爆元件组成的设备组件。适用标准为Group I类防爆设备。该标准适用的标准大气条件（涉及大气爆炸特性）假设防爆设备可在以下环境中安全运行：温度范围为−20 °C至+60 °C；压力范围为80 kPa（0.8 bar）至110 kPa（1.1 bar）；空气为正常含氧量，通常体积分数为21%。 本部分ISO/IEC 80079适用于具有爆炸防护等级（EPL）Ma和Mb的防爆设备及防爆元件。本文件对IEC 60079‑0的一般要求进行了补充和修订。当本文件的要求与IEC 60079‑0的要求发生冲突时，以本文件的要求为准。本文件可用作指导，适用于可能存在瓦斯或煤尘的非Group I矿井地下环境（例如隧道）。 本第二版于2016年发布的第一版予以废止并取代。本版本构成技术修订。有关2.0版与前一版本间全部技术变更的完整清单，请参见文件前言。 [外文原描述]： This Final Draft International Standard is an up to 6 weeks' pre-release of the official publication. It is available for sale during its voting period: 2026-06-05 to 2026-07-17. By purchasing this FDIS now, you will automatically receive, in addition, the Redline version of the final publication. ISO/IEC 80079-38:2026 is published as a dual logo standard and is applicable for the explosion protection requirements for the construction, testing and marking for Group I Ex Equipment that can be an individual item, or be an assembly of multiple items of Ex Equipment and Ex Components forming mining machinery. The standard atmospheric conditions (relating to the explosion characteristics of the atmosphere) under which it can be assumed that Ex Equipment can be operated are: - temperature −20 °C to +60 °C; - pressure 80 kPa (0,8 bar) to 110 kPa (1,1 bar); and - air with normal oxygen content, typically a volume fraction of 21 %. This part of ISO/IEC 80079 applies for Ex Equipment and Ex Components with Explosion Protection Levels (EPLs) Ma and Mb. This document supplements and modifies the general requirements of IEC 60079‑0. Where a requirement of this document conflicts with a requirement of IEC 60079-0, the requirement of this document takes precedence. This document can be used for guidance on underground applications where firedamp or coal dust can be present, but which are not Group I mines, for example tunnels. This second edition cancels and replaces the first edition, published in 2016. This edition constitutes a technical revision. Refer to the Foreword of the document for a complete listing of the technical changes between edition 2.0 and the previous edition of the document.