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How fast does water come out of a firehose?
This hose flows roughly 150 gallons per minute. With a powerful enough pump, this hose takes 87 minutes to fill a 13,000-gallon swimming pool. The 1 1/2-inch double jacket fire hose provides 5.06 gallons per minute per dry pound of hose (150 GPM / 29.6 lbs dry = 5.06 GPM/pound).
How much water does a fire hose discharge?
Most hose reels are designed to deliver 30 litres of water a minute or 0.33 litres every second, but Australian Standards specify that the 19mm fire hoses have to be able to deliver at least 0.45 litres of water per second, at 220kPa.
What size hose do firefighters use?
There are three standard-sized hoselines that the fire service uses as a front line attack line: 1½, 1¾ and 2½ inch. The remaining situations might involve large master streams or deck guns. The key with selecting the correct size line is quite simply getting the right amount of water on the fire.
Do fire hoses hurt?
A high power firehose isn’t a thing to mess around with, these are super powerful hoses used to extinguish fires. Please remember don’t try and replicate these videos at home, belly flops hurt and high-pressure hoses can definitely do a lot of damage.
How do you calculate gpm for a fire hose?
What is the formula for gpm? For example, a one-inch smooth bore tip will have a discharge of 210 gpm: 29.72 × 12 × 7.07 = 210 gpm.
How is firehose measured?
The standard three sizes of hose lines are 1½, 1¾ and 2½ inch. The hose coupling diameter of a 1½- and a 1¾-inch are the same, they only differ with the diameter of the hose jacket.
What size hose does FDNY use?
134-inch hose
Response: FDNY uses 134-inch hose as its primary attack line in most situations. This size hose was introduced in the early 1970s and rapidly became the workhorse for structure fire operations.
Can you get killed by a fire hose?
A young girl died of head injuries a day after she and a friend were hit by a six-pound nozzle on a fire hose that became uncoiled as a truck rushed past her to a fire. Erin Schmidt, 10, of Coraopolis, was pronounced dead at 6 p.m. Friday at Children’s Hospital in Pittsburgh, the Allegheny County Coroner’s Office said.
How many men does it take to hold a fire hose?
Handling a hose line requires at least two people. The reactionary forces produced by the movement of water exiting the nozzle work against the person who is handling it.
How do you calculate water velocity?
Find the surface water velocity (in m/s) by dividing the distance from AA to BB (in this example, 10 m) by the average time (in seconds) and multiply this result by 0.85 (a correction factor) to estimate the average water velocity of the stream. Average water velocity = 0.5 m/s x 0.85 = 0.425 m/s.