Building Code 8.2. 1 Indoor fire hydrant system shall be set in the following buildings or places: 1, factories and warehouses with a building area of more than 300m2.

2. High-rise public buildings and residential buildings with a building height greater than 21m.

Single-storey and multi-storey buildings such as waiting buildings (ships, planes), exhibition buildings, shops, hotels, medical buildings and libraries with an area of 3.5000m3 or more.

Single-storey and multi-storey buildings with more than 4,800 stalls and Grade A theaters, theaters and cinemas of other grades, and 1200 auditorium and gymnasium.

5. Single-storey and multi-storey civil buildings such as office buildings and teaching buildings with a building height greater than 15m or a volume greater than 10000m3.

8.2.2 Buildings or places not specified in Article 8.2. 1 of this specification and the following buildings or places that meet the provisions of Article 8.2. 1 of this specification may not be equipped with indoor fire hydrant system, but fire hose reels or mobile fire hoses shall be installed:

1, single-storey and multi-storey buildings (warehouses) with first-class and second-class fire resistance and less combustible materials.

2. Class-D workshop with fire resistance rating of Grade III and IV and building volume not exceeding 3000m3; Class E workshop (warehouse) with fire resistance rating of Grade III and IV and building volume not exceeding 5000m3.

3, grain warehouse, warehouse, away from alkali town and unattended independent building.

4. There are buildings that will cause combustion and explosion in contact with water.

5. There is no production and domestic water supply pipeline indoors, and the outdoor fire water is taken from the storage tank, and the building volume is not more than 5000m3.