h o u st on f i re d e pa rt me n t p u mp o p er at or p r o gr am val jahnke training facility
DESCRIPTION
HH. H O U ST ON F I RE D E PA RT ME N T P U MP O P ER AT OR P R O GR AM VAL JAHNKE TRAINING FACILITY. Developing Effective Water Supply. Operating Guideline. First Arriving Engine. May start developing water supply Consider fire load Consider fire conditions Next company arrival time - PowerPoint PPT PresentationTRANSCRIPT
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HHHHOOUUSTSTONON FFIIRERE DDEEPAPARTRTMEMENNTT
PPUUMPMP OOPPERERATATOROR PPRROOGRGRAMAM
VAL JAHNKE TRAINING FACILITY
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First Arriving Engine
• May start developing water supply– Consider fire load– Consider fire conditions– Next company arrival time– Consider nearest water source– Consider driveways or dead ends– Inform next company of actions needed
(forward or reverse lay)– Communicate GPM flow to supply company(s)
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Supply Engine(s)
• Use side intakes only– Avoid rear intake (restrictive)
• 3rd LDH line in could use rear intake
• Multiple lines from hydrant to engine– 6” soft suction attached to steamer– adapt 2 1/2” to 4” at hydrant (both if necessary)
• use water thief(s)
– Will need 2 1/2” female to 4” male adapters
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Supply Engine(s)
• Water flow from 2 1/2” pump discharge– Over 1,000 gpm– 2” tip @ 80 psi delivers 1,000 gpm
• Dual lines between engines– Reduces gpm flow in hose by half– Greatly reduces friction loss in hose
• Engine Pressure– E.P. = T.F.L. + 20 (50)
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Relay• Supply engine
– Starts water flow– Maintains correct engine pressure
• Intermediate engine(s)– Should be pumping same as supply engine if
hose lay is the same
• Attack engine– Different engine pressure– Pressure for individual lines (hand or master)
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Relay
• After water supply is established– Set governor or relief valve
• Shut down of relay– Reverse order– Attack engine first– Intermediate next– Supply engine last
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Dump and Relief Valves
• Dump valve(s) operating– Check incoming pressure– Do not cap– If capped, loss of pump protection
• Relief valve(s) operating– Check incoming pressure– May need adjusting
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Reverse Lay
• Advantages– Crew left at fire scene– Additional manpower– 2 in / 2 out– Supply engine spots at hydrant– Hydrant supply not interrupted
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Ladder Pipe Operations
• Newer apparatus have flow meters– E-One trucks– Needs approximately 200 psi at base of truck– LTI uses PDP (predetermined pressure)
• FY 2000 platform and ladders– Will be setup to deliver 1500 gpm– Will have siamese for dual 4” supply laid to
truck
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Ladder Pipe Operations
• Need engine spotted within 100’ of ladder truck– Engine may need dual lines laid into side
intakes depending on length of line from supply engine
– Supply engine at hydrant with 6” soft suction and possibly second 4” from same hydrant
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Supplemental Pumping
L93
E70 E52
E61
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Standpipe/Sprinkler
• High failure rate of piping between the FDC and the standpipe riser
• There are a few sprinklers on a separate riser, with a separate FDC
• Very tall buildings are divided into two or more vertical zones
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Non-PRV Systems
• Standpipe systems– Fog nozzles at 150 psi + 5 psi/floor to the fire
floor– 2 1/2” straight streams at 65 psi + 5 psi/floor to
the fire floor
• Sprinklers at 150 psi + 5 psi/floor to the fire floor
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PRV Systems
• Engines should supply the systems only if the building’s fire pumps are not functioning adequately
• The designed system pressure must be supplied (information in high rise survey)
• Standpipe & sprinklers are calculated the same on PRV systems
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Tandem Pumping
• Is a short relay for high rise buildings (this will be a high pressure operation)
• Becomes necessary after 40 stories (roughly 300 psi)
• High pressure engine reverse lays from the FDC to an safe area (falling glass)
• Supply engine will reverse lay to the hydrant
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Large Volume Hand Lines
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LDH to Ground Monitor
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3” to Ground Monitor
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LDH to Ground Monitor
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FYI
• Centrifugal pump– Can double its capacity with positive pressure
supply (hydrant system)
• Staged engines– May need to share adapters– Used to lay second line (forward or reverse)
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HHHHOOUUSTSTONON FFIIRERE DDEEPAPARTRTMEMENNTT
PPUUMPMP OOPPERERATATOROR PPRROOGRGRAMAM
VAL JAHNKE TRAINING FACILITY