Dry pipe standpipe systems
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Use water supplied by the pumper and can only be used after the FDC
connections to the pumper have been made
,Vacuum test
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Checks for leaks in the hard suction hose, priming device, and pump
Steps to conduct a pressure control test - part 2
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1. Set the fire pump so that it's discharging it's rated capacity at a net pump
discharge pressure of 150 psi by slowly re opening all discharge valves
2. Reduce the pumping engine throttle until the net pump discharge pressure
drops to 90 psi
3. Set the pressure control device to maintain the discharge pressure at 90 psi
4. Close each of the flowing valves one at a time. Close each valve in no less
than 3 seconds and no more than 10 seconds
5. The pump discharge pressure should rise no more than 30 psi
When do we mix different synthetic brands of foam?
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NEVER - unless they're made to military specification (MIL - SPEC)
,Gauge and flow meter test
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Checks that the given discharge information is accurate when the pump is in
operation
This test compares flowmeter readings with actual pitot tube readings
The 2 readings should differ by +/- 10%
Advantages of Water
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1. Can absorb large amounts of heat
2. As surface area increases, heat absorption increases
3. Water is plentiful in most areas
4. Steam occupies 1,700 times its original volume as water
The discharge pressure gauge must be capable of measuring psi from
Give this one a try later!
0 to 400
, The intake pressure gauge must be capable of measuring a vacuum in inches Hg from
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0 to 30
types of portable foam proprtioners
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1. in line foam educators
2. foam nozzle eductors
3. self educting master stream nozzle
I'm a standpipe systems the pump discharge pressure will depend on pressure loss
Give this one a try later!
In the standpipe of 10 psi
In the hose lay from the pumper to the FDC
In the hose on the fire floor
Due to nozzle pressure
Due to elevation pressure caused by the height of the building
Other common problems with standpipes
Give this one a try later!
Use water supplied by the pumper and can only be used after the FDC
connections to the pumper have been made
,Vacuum test
Give this one a try later!
Checks for leaks in the hard suction hose, priming device, and pump
Steps to conduct a pressure control test - part 2
Give this one a try later!
1. Set the fire pump so that it's discharging it's rated capacity at a net pump
discharge pressure of 150 psi by slowly re opening all discharge valves
2. Reduce the pumping engine throttle until the net pump discharge pressure
drops to 90 psi
3. Set the pressure control device to maintain the discharge pressure at 90 psi
4. Close each of the flowing valves one at a time. Close each valve in no less
than 3 seconds and no more than 10 seconds
5. The pump discharge pressure should rise no more than 30 psi
When do we mix different synthetic brands of foam?
Give this one a try later!
NEVER - unless they're made to military specification (MIL - SPEC)
,Gauge and flow meter test
Give this one a try later!
Checks that the given discharge information is accurate when the pump is in
operation
This test compares flowmeter readings with actual pitot tube readings
The 2 readings should differ by +/- 10%
Advantages of Water
Give this one a try later!
1. Can absorb large amounts of heat
2. As surface area increases, heat absorption increases
3. Water is plentiful in most areas
4. Steam occupies 1,700 times its original volume as water
The discharge pressure gauge must be capable of measuring psi from
Give this one a try later!
0 to 400
, The intake pressure gauge must be capable of measuring a vacuum in inches Hg from
Give this one a try later!
0 to 30
types of portable foam proprtioners
Give this one a try later!
1. in line foam educators
2. foam nozzle eductors
3. self educting master stream nozzle
I'm a standpipe systems the pump discharge pressure will depend on pressure loss
Give this one a try later!
In the standpipe of 10 psi
In the hose lay from the pumper to the FDC
In the hose on the fire floor
Due to nozzle pressure
Due to elevation pressure caused by the height of the building
Other common problems with standpipes
