DL/T 1366-2023 "Sulfur Hexafluoride Gas for Electric Power Equipment" is the Chinese electric power industry standard, which stipulates the technical requirements, test methods, inspection rules, signs, labels, Encasement, transportation and storage requirements of new sulfur hexafluoride gas for electric power equipment. The standard replaces DL/T 1366-2014 and is issued and implemented by the National Energy Administration. It is applicable to sulfur hexafluoride gas used in electric power equipment to ensure its mass and safety. The drafting unit includes a number of electric power research institutes and related enterprises. It is proposed by the China Electricity Council and managed by the Standardization Technical Committee of high voltage switchgear and DC power supply in the electric power industry.