Chap 9 Built In fire Protection Flashcards
Four main types of Sprinkler Systems
- Wet Pipe
- Dry Piper
- Deluge
- Preaction
According to the National Fire Protection Association, what percent of fires in sprinkled buildings are either extinguished or contained?
96%
All Sprinkler systems have along with other test and drain valves. This controls the flow of water from domestic water supply systems and/or on site fire pumps.
Main water control valve
Three common types of water main control?
- Outside screw and yoke (OS&Y)
- Post indicator valve (PIV)
- Wall Post indicator valve (WPIV)
Most common main water control. Valve is threaded stem that controls its opening and closing.
Outside screw and yoke (OS&Y)
Type of main water control valve characterized by the visible window, which indicates the position of the valve.
Post indicator valve.
Water main control valve mounted on a wall characterized by the visible window, which indicates the position of valve.
Wall post indicator valve (WPIV)
These valves ensures water can only flow in one direction. Think ground monitor.
Check/Clapper Valves
What are stopcock valves used for in Fire protection.
System drainage and alarm silencing.
The drain that drains the entire system.
Main Drain
Mechanical or electrical device attached to a sprinkler system to alert for water flow.
In hydraulic alarm, what is used to notify water flow.
Water Flow Alarm
Water Gong
Every sprinkler system must have this.
Good water supply that is reliable, automatic, adequate volume and pressure.
Stationary pump designed to increase water flow or pressure in a sprinkler or standpipe system.
Fire Pump
Required minimal residual water pressure to the highest farthest sprinkler head.
15psi
What is a test header. What does it indicate?
Indication of a fire pump.
Multiple 2 ½ inch outlets that are used for testing fire pump.
What determines the number of outlets on a test header?
required flow for the occupancy.
In addition to the on site water source these will be provided for fire department use.
Fire department connections (FDCs)
Vertical piping in standpipe or sprinkler systems.
Riser
Fire Protection System constantly has water throughout the system.
Wet Pipe System
Fire Protection System has no water in piping beyond check valve. Replaces water with air that is under pressure to keep water from entering system. Typically where piping could potentially freeze.
Dry Pipe Sprinkler System
These are found in many dry pipe systems to speed the process of getting water to the fire area.
Accelerators
Exhausters (Bleeds off pressure)
Fire Protection System similar to dry pipe systems but fills with water with separate alarm. The sprinkler heads still need to be heated to activate in order for water to flow. Found in areas where water damage must be prevented.
Preaction system
Fire protection system in which the pipe is dry and all heads are open. Used in locations where occupancy is extra hazardous.
Deluge Sprinkler System
This NFPA standard for installation of sprinkler systems in one- and two-family dwellings and manufactured homes.
NFPA 13D
This class of standpipes must have:
- a water supply adequate to flow 500 gpm for at least 30
- Supply must provide a minimum residual pressure of 65 psi at highest/farthest outlet while flowing 500gpm
- Each additional standpipe in system must flow 250 gpm for at least 30 mins
Class 1 Standpipes
This standpipe system is for building occupants so they may try to control the fire while still in incipient stage. Must have:
- Water flow of 100 gpm for at least 30 mins
- Min residual pressure of 65psi at highest/farthest outlet flowing 100 gpm
Class II Standpipes
This class of standpipes is designed for the use of fire departments and for use of by building occupants.
Class III
Potential problems dealing with Class III Standpipe systems.
Pressure reducing devices.
According to NFPA , standpipe systems must be limited to a maximum height of?
Max height of 2 stand pipe systems
NFPA 14
275 ft
Higher than 275 ft additional zones must be installed.
2 max height is 550
Color Coding of FDCs
- Standpipe
- Automatic sprinkler system
- Non automatic sprinkler system
- Combination sprinkler and standpipe system
- Red
- Green
- Silver
- Yellow
These two types of extinguishing systems are found in locations such as computer rooms and other intricate electrical equipment.
Carbon Dioxide and Halogenated
Extinguishing agent contains carbon and one more more elements (Bromine, chlorine, fluorine, and iodine.)
Interferes with he chemical chain reaction.
Halon
These Newer extinguishing agent are considered nontoxic, nonconductive and ecologically safe and effective for Class A,B, and C fire.
Clean agent, FE-36 or Centrimax ABC 40
Excellence reference as to what SOGs should contain when dealing with standpipe and sprinklers.
NFPA 13E
