This document specifies the energy efficiency classes, technical requirements, and test methods for precipitators. This document applies to dry electrostatic precipitators for flue gas dust removal of boilers in coal-fired power plant and sinter machine heads in the iron and steel industry, wet electrostatic precipitators for flue gas dust removal of coal-fired power plant boilers and iron and steel production facilities, baghouses for coal-fired boilers, baghouses dust collectors for rotary kilns in new dry-process cement plants, and baghouses for desulfurization and dust removal in semi-dry sintering processes in the steel industry, as well as electrostatic-fabric integrated precipitator for flue gas dust removal in coal-fired power plant boilers, rotary kilns in new dry-process cement plants, and alumina calcining furnaces.