Part 3 Fire Safety Equipments
Chapter 4 Necessary Equipments for Fire Rescue
Section 1 Connecting delivery pipe
Hose connection and fire department connection shall be installed comforming to the following:
1.A hose connection shall be installed in every floor level of underground buildings, and on every floor from the third floor upwards of other buildings in stairway, or vestibules of emergency elevators (including the area within a 5-meter radius of the aforesaid location accessible to firefighters during a fire). Moreover, the hose connection of each floor level shall be within a 50-meter radius from any point of the floor.
2.The hose connection shall be double-mouth type, equipped with a quick connector having a diameter of 63 mm, located at a height around 0.5 meters to 1.5 meters from the floor, and installed in the house made of 1.6mm thick steel sheets or other non flammable materials with the same or higher performance. The shorter side of the house cover shall be at least 40 cm, whereas the longer side shall be at least 50 cm. The house cover shall be marked with “Hose connection”, each word measuring at least 20 cm2. However, a single-mouth type may be used for levels from the tenth floor going down.
3.At least one hose connection for testing purpose shall be installed at proper location on the building roof deck.
4.Fire department connections shall be made easily accessible to fire trucks and located in areas without any water supply obstruction problems. The actual quantity of hose connection shall exceed the total number of standpipes.
5.Fire department connection should be double-mouth type, equipped with a female 63-mm diameter quick connector, located at a height around 0.5 meters to 1.5 meters from the floor, and marked with “fire department connection”.
6.A check valve and stop valve shall be installed at a spot near the fire department connection for inspection and verification convenience.
Matching pipes shall be equipped pursuant to the following provisions:
1.Dedicated pipe shall be used, and the diameter of standpipes shall be not les than 100mm. Where the height of the building is less than 50m, the standpipes may be shared by the matching pipe together with indoor fire hydrant; and the pipe diameter shall be not less than 100mm, the diameter of branch pipes not less than 65mm.
2.Matching pipes shall comply with CNS No. 6445 and No. 4626, or have the same or higher strength, corrosion resistance and heat endurance. If the design pressure of water delivery exceeds 10kgf/cm2, matching pipes complied with National Standard (CNS) No. 4626, and with the Pipe Number SCH40 or above, or having the same or higher strength, corrosion resistance and heat endurance shall be used.
3.Where there are two or more standpipes in a same buildings, cross pipes shall be equipped to interconnect the standpipes.
4.Pipe diameter shall be calculated and configured pursuant to the hydraulic calculation.
5.Matching pipes shall be enable to endure a pressure not less than 1.5 times the design pressure of water delivery, and last for 30 minutes. Where a relay pump is equipped, the secondary side pipe of the pump shall be enable to endure a water pressure not less than 1.5 times the fully closed lift of the pump.
A water hose box shall be equipped within 5m away from the water outlet in every storey above the 11th floor. One straight water fog double-purpose aimer and at least two pieces of 20m-long water hoses shall be equipped inside the box, and the box shall be deep enough to contain water hoses and aimer, and marked with obvious text “Water Hose Box”, each character bigger than 20cm2, and the surface area shall be more than 0.8m2.
The hose box mentioned above shall be made of steel sheets with a thickness more than 1.6mm or other nonflammable materials with the same characteristics.
Where the building is higher than 60m, connecting delivery pipe shall employ wet type, and the relay pump shall meet the following requirements:
1.The total head of the relay pump shall be more than the calculated value using the formula below:
Total head = water head loss by fire hose friction + water head loss by matching pipe friction + drop height + water discharging pressure
H = h1 + h2 + h3 + 60m
2.The water output of the relay pump shall be more than 2,400 L/min.
3.Manual actuating device and red starting indicator lamp shall be equipped nearby the water outlet, unless remote controlled starting can be made by the disaster prevention center and communicator is equipped for communication between the water outlet and the center.
4.Water outlet, stop valve and pressure regulating valve shall be equipped at the primary side of the relay pump, and inverted valve, stop valve and water inlet or outlet at the secondary side.
5.Roof tank shall have a capacity of more than 0.5m3, and relay tank more than 2.5m3.
6.Bypass pipe equipped with inverted valve shall be installed between inlet side matching pipe and outlet side matching pipe.
7.When the sum of shutoff head and net positive suction head is more than 170m, additional pump shall be added to make serial connection and running.
8.Devices shall be installed in the machine room of relay pump and at the water inlet for connecting delivery pipe for communication with the disaster prevention center.
9.When testing the discharging of a relay pump, the water shall be sent from the water inlet at the design pressure, and an aimer with a caliber of 21mm shall be used at the top storey. The water discharging pressure shall be more than 6kfg/cm2 or 0.6Mpa and water output more than 600 L/min. The design pressure for water delivery shall be obviously marked nearby the water inlet as shown in the figure below:
The design pressure of water delivery is calculated pursuant to the following provisions:
1.The design pressure of water delivery shall be not less than the calculated value using the formula below:
Design pressure of water delivery = water head loss by matching pipe friction +water head loss by fire hose friction + drop height + water discharging pressure
H = h1 + h2 + h3 + 60m
2.The water head loss by fire hose friction is 4m.
3.The quantity of water is 1,200 l/min for the top storey and the second top storey, and 2,400 l/min for other storeys.
4.The quantity of water is 600 l/min for the branch pipe of each aimer.