Part 3 Fire Safety Equipments
Chapter 1 Fire Extinguishing Equipments
Section 4 Water Fog Fire Extinguishing Equipments
Water fog nozzle shall be equipped pursuant to the following provisions:
1.The total area of protected objects shall be within the effective range of each water fog nozzle.
2.The effective radius of each water fog nozzle shall be not more than 2.1m.
3.The quantity of water fog nozzles shall be worked out according to the mounting angle, the drainage output and the area of protected objects. The water output per square meter shall be not less than 20 l/min in places listed in Item 3 and Item 4 in the attached table of Article 18, and not less than 10 l/min in places listed in other items in the same table.
Emergency power source, piping, fittings, roof tank and pressurization and transmission test upon completion, water flow detecing device, actuating device, and deluge valve of water spray fire-extinguishing equipments shall be established pursuant to Articles 38, 44, 45, and 51~53.
Spraying area refers to the radiation area of a deluge valve when being actuated, and each area is 50m2 in principle.
Where there are two or more foresaid spraying areas, the diameter of main pipe shall be not less than 100 mm.
The capacity of water source for water spray fire extinguishing equipments shall be kept at not less than 20 m3. Where there are two or more spraying areas, the capacity shall be kept at not less than 40 m3.The capacity of water source for water spray fire extinguishing equipments shall be kept at not less than 20 m3. Where there are two or more spraying areas, the capacity shall be kept at not less than 40 m3.
Water source equipped under Article 64 shall be connected to water pressurization and driving device.
Where fire pump is used as pressurization and driving device, water output and discharging pressure shall meet the following requirements, and emergency power source shall be connected.
1.Water output: more than 1,200 L/min. Where there are two or more spraying areas, the figure shall be more than 2,000 l/min.
2.Discharging pressure: shall enable each water fog nozzle in a spraying area at the farthest end of the piping system to maintain a pressure of more than 2.7kgf/cm2 or 0.27Mpa. But those for protecting electric equipment, the figure shall be more than 3.5kgf/cm2 or 0.35Mpa
The distance of water fog nozzle and matching pipe from high-voltage electric equipments shall comply with the table below:
│Voltage (KV) │≦7 │≦10│≦20│≦30│≦60 │≦70 │
│Separated │Standard│250 │300 │400 │500 │1,000 │1,100 │
│(mm) │Minimum │150 │200 │300 │400 │700 │800 │
≦100 │≦140 │≦200 │≦345 │
1,500 │1,900 │2,60 │3,300 │
1,100 │1,500 │2,100 │2,600 │
Water outlet for water spraying shall be equipped pursuant to Articles 59.1~4, and “Outlet for Water Spraying” and pressure range shall be marked obviously.
Drainage equipments in indoor parking areas equipped with water spray fire extinguisher shall comply with the following provisions:
1.The ground of parking area shall have a slope gradient of more than 2%.
2.Parking slots except the proportion toward the driveway shall be equipped with 10cm or higher boundary barrier or boundary ditch with a depth up to 10cm and width over 10cm, which shall be connected with drainage.
3.Fire extinguishing pit shall be provided with oil-water separator, and located in place where it is difficult for fire to reach.
4.Drainage ditch shall be equipped with collecting pipes and in the center or the two sides of driveway and connected to the fire extinguishing pit.
5.The size and slope gradient of drainage ditch and collecting pipe shall ensure the maximum capacity of the pressurization and driving device can be discharged effectively.