Standpipe, FDC, Hydrants Flashcards
Standpipe system classes
Class 1
Class 2
Class 3
Class 1 standpipe system contains
2 1/2” hose connection, for trained personnel only
Class 2 standpipe contains
1 1/2” hose valves, intended for trained building occupants
Class 3 standpipe system contains
1-1/2” & 2-1/2” hoses valves, intended for FD use only
Class 2 and class 3 standpipe classes are supplied with what
100 ft of 1-1/2” hose
Nozzles that USED to be supplied for hoses in standpipes had
A 3/8 or 1/2” outlet that could not be shut off
Standpipe systems are generally designed by
An architect or engineer
All classes of standpipe requires valves on
Each floor
Hose valves shall be ____ from ground
Within easy reach, never over 5 feet
Never less then 3 feet
Class 1 standpipe systems located
-Each main floor landing
-at the highest stairway landing w/ access to roof
- hose travel distance must not be exceeded (130’ unsprinklered, 200’ for NFPA 13&13R)
Class 2 standpipe systems located
-The corridor or adjacent space to stairway enclosure
-every 130’
All new standpipe systems shall be tested at
200 psi, 2 hours, 0 psi loss Or 50 psi in excess of system pressure, whichever is greater
Standard fittings and hose valves are rated for a pressure up too
175psi
Standpipe system types
- Automatic or Manual Wet
- Automatic or Manual Dry
- Semi Automatic
- Combined
Automatic Wet and Dry standpipe system consist of
Wet - Full of water at all times, capable of supplying system demand at all times
Dry - Full of air until valve is opened, capable of supply system demand at all times
Manual wet and dry standpipe systems consist of
Wet - full of water at all times, relies on FD to supply system demand
Dry - full of air until valve is opened, no permanent demand, relies on FD to supply system demand
Semi-Automatic Dry standpipe system consists of
Attached water supply capable of supplying system demand utilizing a deluge valve which is activated by a remote device
Combination Standpipe system consist of
Supplies both hose connections and automatic sprinklers
Schedule 10 pipe is pressure rated for
300psi
How can standpipe be joined together
-grooved
-threaded
-welded
Where copper pipe is used
K,L and M can be used
Must be brazed
Hose valves shall have a minimum of ___ clearance around any part of the cabinet
2”
Standpipe system gauges located
Top floor of each riser
Class 3 standpipe systems located
-Locations comply with 1&2
-travel restraints for 2 do not apply
-
Standpipe system pipe size shall be a minimum of
4”
Combined systems in a partially sprinklered building shall have a minimum pipe size of
6”
Branch lines for standpipe systems shall not be smaller then
2 1/2” inch
If pressure exceeds 100psi on an 1-1/2 outlet, what is required
A pressure restricting device
Minimum pressure for most remote 2-1/2” outlet is
100psi
Minimum pressure for most remote 1-1/2” outlet
65psi
Minimum flows for class 1&3 (not out of hose connection, system demand)
- 500 gpm through 2 most remote 2-1/2” outlets
- 1000 gpm for fully sprinklered buildings
- 1250 gpm for buildings that are not fully sprinklered
Minimum flow rate class 2
100 gpm @ 65 psi from most remote hose connection
Max flow rate single 2-1/2” valve
250gpm
Max flow rate for single 1-1/2” valve
100gpm
Drain size for PRV testing
2-1/2 and less 1 pipe size bigger
3” and higher - same size
Ex. 3” drain pipe for 2-1/2” PRV
2” pipe for 1-1/2” PRV
Water supply shall be able to meet system demand for
30 minutes
Buildings under construction must have
Hose connection at each floor level exit stairway & connection for FD hose
The maximum pressure at any point in the standpipe system shall not exceed
350psi
1-1/2” hoses stations are NOT ____
Considered standpipe systems
1-1/2” hoses stations are generally installed for
Mop up after a fire
Minimum size pipe a 1-1/2” hose station can be taken off of is
2-1/2” pipe OR 2” when hydraulically calculated
Hand hose stations with horizontal runs <under 20 will have what size minimum pipe feeding it
1”
Hand hose stations with horizontal runs 20-80 feet will have what size minimum pipe feeding it
1-1/4”
Hand hose stations with horizontal runs more then >80 feet will have what size minimum pipe feeding it
1-1/2”
All Vertical pipe feeding hose stations will be a minimum of
1”
Hose stations must be installed with a coverage area of
100(hose length) + 30 (spray distance) = 130ft total
Dry barrel fire hydrant main control valve is located (depth in ground)
1’ below the frost line
Time requirement for hydrant draining is
Drain in 60 minutes
Wet barrel hydrant control valve is located
Just below grade
Wall hydrants are installed when
Fire dept. may need access in an area that has no hydrant
How much water shall be above dry hydrant intake
2ft
How much water below water intake for dry hydrant
1ft
Dry hydrants must sit
Below the drought line (based off 50 year drought level for water source)
What is used to protect hydrant damage
Pillars
Class & Colour of Hydrant 1500+ gpm
Class AA & Blue
Class & Colour of Hydrant 1000-1499 gpm
Class A & Green
Class & Colour of Hydrant 500-900 gpm
Class B & Orange
Class & Colour of Hydrant under 500 gpm
Class C & Red
Hydrant how far from standpipe connection
100 feet
Hydrant how far from sprinkler connection
45m (148 feet)
What should be at the base of a hydrant
- concrete pad
- gravel for drainage
Isolation valve # of turns rule
3x pipe diameter +or- 2 or 3 turns
Hydrants shall be ______ above finish grade
18” to 36” (centre of outlet)
Hydrants in house hoses shall be a minimum of _____ from floor
12”
Minimum size piping for hydrants is
6”
What is the minimum outlet size and number on an FDC
2-1/2” x 1
Anything deemed a high rise building (over 75’ from FD access) must have how many FDC inlets
2-1/2”x4
Automatic dry standpipe system can be no larger then ____
750gal
Pneumatic test of standpipe system consist of
40 psi for 24 hours, 1.5 psi loss
FDC shall be how far off the ground
18” to 48”
FDC can be omitted when
-single storey building less then 2000sqft
-deluge system that exceeds the FD pumping capability
-remote area that doesn’t have FD access
Minimum size FDC feeding fire engines is
4”
Minimum size FDC feeding fire boats
6”
Max size riser for single outlet FDC
3”
Hydrants shall be a minimum of how far from building
40 feet
Hydrants shall be spaced
300ft apart
A control valve will be installed ____ from the hydrant and be which kind of valve
20ft - non rising stem
Check valve on FDC must be a minimum of how far away from connection
4ft
What is the lettering on a FDC sign
1” raised lettering, must say what it operates
standard for standpipe systems
NFPA 14
Standard for service mains
NFPA 24
Standard for flow testing and marking of hydrants
NFPA 291
Canadian pipe threads
CSA
American pipe threads
NHS
Stortz connection is connected with ____ turn
1/4” turn
Dry hydrant can have what fittings
2- 45s or 1- 90
What kind of strainer is on the end of a dry hydrant
Basket strainer
Depending on municipalities, how long is dry hydrant piping generally limited too
25 feet
Flush hydrants are usually located at
Air ports
Pull station for semi automatic system is to be located how far from hose valve
3 feet
2-1/2” hose lines are only ever to be used by
Fire department personal
Standard cabinet size is
30x30x9
Gauges must be what size
1/4”
Scale for gauges must have
2x the pressure working against it
Auto dry standpipe systems can be more then 750 gal if
water delivery time of 3 minutes can be met
Pressure regulator can be omitted if a the air compressor is
5.5 cubic feet air compressor
Paddle flow max velocity and gal to operate
18’ per second - 10 gpm
High rises can only use what systems
Auto and semi auto
Class 2 systems do not require
Protection from fire damage
Pipe pitch for dry standpipe and dry standpipe in refrigerated areas
- 1/4” per 10’
- 1/2” per 10’
If hose connections are not in stairwells, what must be added
A sign to show location of standpipe valves
Letters on standpipe sign must be
2-1/2” big and red lettering
If hose is less then 1-1/2” on class 2 the distance of cabinets must be
120ft and non collapsible
Max static pressure at 2-1/2” outlet
175psi
What type of PRV’s do 1-1/2 and 2-1/2 use
1-1/2 = pressure RESTRICTING
2-1/2 = pressure REDUCING
