本标准旨在就爆炸性环境中使用的设备的维修、大修、回收和改造提供说明，主要是技术性说明。它不适用于维护，除非维修和大修不能与维护分离，也不提供电缆引入系统的建议，当设备重新安装时，可能需要更新电缆引入系统。它可以防止在没有制造商和认证文件的情况下进行i、m和s类保护的大修。本标准基于以下假设:在整个过程中都采用了良好的工程实践。

The objective of this Standard is to give instructions, principally of a technical nature, on the repair, overhaul, reclamation and modification of equipment designed for use in explosive atmospheres. It is not applicable to maintenance, other than when repair and overhaul cannot be disassociated from maintenance, neither does it give advice on cable entry systems, which may require a renewal when the equipment is re-installed. It prevents overhaul without manufacturer and certificate documentation to types of protection “i”, “m” and “s”. This Standard is based on the assumption that good engineering practices are adopted throughout.