Article 45 of the Regulations on Safety Supervision of Gas Cylinders (repealed, still available for reference): Units storing gas cylinders shall have special warehouses to store gas cylinders. The gas cylinder warehouse shall meet the requirements of Code for Fire Protection Design of Buildings, and the storage quantity of gas cylinders shall meet the relevant safety regulations. Too much is excessive storage, which is a potential safety hazard.

Class III LPG bottled supply station, V_ 1m3, equivalent to 28 bottles 15kg. That is to say, for Class III liquefied petroleum gas bottled supply stations, 29 bottles or more stored in 15kg cylinders belong to excess storage. If 29 bottles 15kg are stored, it belongs to the second-class supply station category (class II, 1m3).