06 Sprinkler and Standpipe Systems Flashcards
Wet pipe Sprinkler Systems
Designed to be fast acting - water discharging immediately after activation
Dry pipe
Filled with air under pressure. Disadvantages are:
- Discharge of water is NOT immediate
- there is air in the system
Preaction Dry System
Piping gets filled with water only after a fire alarm system is activated.
Deluge System
When a fire activates the system, ALL the sprinkler heads will discharge water (vs regular systems that only discharge at the head(s) near the fire.
Sprinkler System Components
- FDC
- Valves
- Risers
- Drains
- Sprinkler Heads
If FDC connects to sprinkler and standpipe, which do we pressure the system for?
It is more important to deliver the proper amount of water to the hoselines where people are working. FF safety must always take priority.
Valve Types
Outside Stem and Yolk (OS&Y)
Post Indicator Valve
Butterfly Valves
Retard Chamber
(Not where my wife wants to put me)
A device placed between the pump and the water flow alarm to minimize water surges.
Size of riser pipes depends on…
- Distance between pump and the heads
- The total number of heads served on that line
What determines the temperature at which the sprinkler heads will activate?
The type of occupancy
What is being protected
Fusible Link Head
Connected by using temperature sensitive solder. The solder is designed to melt at a predetermined temp.
Frangible Bulb
The amount of liquid determines the temp at which the bulb will break.
Color coding for sprinkler heads
Ceiling Temp - Solder Temp - Color
100 - 155-165 - Bronze
150 - 212 - White
225 - 286 - Blue
300 - 360 - Red
It is best to set the discharge pressure at ______. This gives the sprinkler system the largest amount of water available.
150psi
Outside connections that have male couplings are test connections.
