This standard is formulated for the first time and specifies the equipment, inspection quantity, test procedure and test report for the airtightness test of dangerous goods Encasement. It is applicable to the airtightness test of dangerous goods Encasement, especially the inspection of Encasement containers that require gas sealing. The standard refers to the United Nations "Recommendations on the Transport of Dangerous Goods" and is consistent with it in technical content. The standard does not apply to Encasement of radioactive substances, Encasement of compressed gas containers and Encasement of overweight or oversized containers.