Cylinder storage capacity: How many cylinders can be stored on site at most?

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I. According to Article 45 of the **Regulations on the Safety Supervision of Gas Cylinders** issued by the Quality and Technical Supervision Bureau (revised in 2015): Entities that store filled gas cylinders must have dedicated warehouses for holding such cylinders. These warehouses must comply with the requirements of the Code for Fire Protection Design of Buildings, and the number of cylinders stored there must meet relevant safety regulations. II. Chapter 3 of the Code for Fire Protection Design of Buildings stipulates: 1. At sites where acetylene cylinders are used, the storage volume of acetylene shall not exceed 30 m3 (equivalent to 5 cylinders, referring to acetylene cylinders with a nominal capacity of 40 L). When the storage volume of acetylene exceeds 30 m3, a separate storage area shall be created using non-combustible materials, with one side of this area being a solid wall. 2. When the storage volume of acetylene gas exceeds 240 m3 (equivalent to 40 cylinders), a storage warehouse with a fire resistance rating of not less than grade II should be constructed, and the fire separation distance from other buildings should be no less than 10 m; otherwise, it should be separated by a fire wall. III. In accordance with AQT7009 \"Standards for Safety Production Standardization in Machinery Manufacturing Enterprises\" 4.2.27.4.3, the maximum number of gas cylinders that can be stored in one location at the work site is 20 ； If there are more than 20 cylinders, a secondary cylinder storage facility should be established. IV. In accordance with CNPC Natural Gas Group Standard QSY1365-2011 \"Safety Management Regulations for the Use of Gas Cylinders\", section 4.4.6: 1. At the site where acetylene cylinders are used, the storage volume of acetylene shall not exceed 30 M3 (equivalent to 5 acetylene cylinders with a nominal capacity of 40 L each) ； 2. When the storage volume of acetylene gas exceeds 30 M3, a separate storage area should be created using non-combustible materials, with one side of this area being a solid wall ； 3. When the storage volume of acetylene gas exceeds 240 M3 (equivalent to 40 cylinders), a storage warehouse with a fire resistance rating of not less than grade II should be constructed, and the fire separation distance from other buildings should be no less than 10 meters; otherwise, it should be separated by a fire wall. V. Since the \"Safety Supervision Regulations for Dissolved Acetylene Cylinders\" have been repealed, and in line with the principle of strict management, HSE authorities currently recommend that if your company does not have a cylinder storage facility, the amount of acetylene stored on-site should not exceed 5 cylinders.