The standard "Explosive Atmospheres - Part 13: Repair, Overhaul, Repair, and Transformation of Equipment" (GB3836.13-2013) has been implemented since November 14, 2014, replacing the original standard "Electrical Equipment for Explosive Gas Atmospheres - Part 13: Maintenance of Electrical Equipment for Explosive Gas Atmospheres" (GB3836.13-1997) (hereinafter referred to as the new standard and the original standard). Due to the changes, additions, and deletions in some parts of the new standard, many people have doubts, especially the frontline personnel of some units, who often refer to the following issues for discussion.