This document specifies the terms and definitions, abbreviations, general provisions, material and manufacturing requirements, process requirements, electrical requirements, automation control and instrument requirements, equipment performance index requirements, Safety and environmental protection requirements, test methods, inspection rules, marking, packaging, transportation and storage, construction and acceptance, equipment operation and maintenance, etc. This document is applicable to production units, design units, construction units and operation and maintenance units of equipment that treat domestic sewage or similar water quality and the rated processing capacity of a single equipment does not exceed 500m3/d.