Things Needed
Hoses provide the ultimate in utility and flexibility in actuate a liquid or gas from one place to another safely and efficiently . A panoptic categorisation of hosiery are available for domestic and gardening usance , industrial applications and in contend fires . In every type , hosiery - system designers seek to provide maximal flow with minimum pressure losses , and they use Bernoulli ’s Principle , which simply states that flow through a thermionic tube is relative to the square etymon of pressure alteration through a system . you may calculate flow from pressure information using published hose data .
Garden Hose
Step 1
Define the flow program program . In this example , a 50 - foot garden hose with a 5/8 - in ID ( 0.625 - inch inner diameter ) is being used to fill a pressurized tank with 5 pounds per square inch of secure atmospheric pressure . The water force per unit area at the hose connection to a well ticker is 45 psi . From this info you could calculate weewee catamenia through the hose using insistency .
Step 2
cipher the total press drop or differential through the 50 feet of hose . Subtract the electric outlet pressure , 5 psi , from the intake imperativeness , 45 psi , to cede the 40 psi total going through the hosiery .
Step 3
Look up the flow pace for 40 psi of head loss through 50 feet of 5/8 - column inch ID hose . In this case , datum for Schedule 40 - polyvinyl chloride plastic piping of the same inner diameter may be used to find the flow . Schedule 40 - PVC plastic pipe has an privileged diameter of 0.622 inches . The press - loss data for this tobacco pipe shows 35.5 pounds per square inch departure for 10 gallons per minute ( gpm ) through 100 foot of tobacco pipe . To compute the flow for 40 pounds per square inch through 50 feet of hose , take the straight root of ( 40 psi loss/[35.5/100 feet/50 feet ] ) and multiply by 10 gpm to yield 15.01 gpm .
Fire Hose
Define the ardour hose practical app . A 100 - fundament , 3 - inch - diameter fire hose is being essay for use to drain a large swimming pool using a pump that rescue 55 psi . you may reckon the flow through the fervency hosiery with this entropy .
face up the specific flow vs. air pressure data for the fire hose . The manufacturer ’s pressure loss data shows that a 3 - inch ID hose misplace 57.8 psi for an 850 gpm flowing .
Calculate the exact menstruation rate by correcting the data to actual pressure deprivation . Take the square tooth root of 55 psi/57.8 psi , which is 0.9755 , and multiply by 850 to get 829.16 gpm .
Tip
Always manifold your catamenia needs by 1.25 when determining the right hosiery size for the job in monastic order to add greatly to efficiency .
Warning
The propellant force of fire hose nozzles can quickly do damage and cause serious hurt if not plow correctly .
References
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