# Water Hammer Equations Formulas Design Calculator

## Fluid Mechanics Hydraulics Pipe Flow

Solving for upstream pipe length.

#### Inputs:

 pressure increase (P) pascal atmosphere bar dyne/centimeter^2 foot of water inch of mercury inch of water kilonewton/meter^2 millibar millimeter of mercury newton/meter^2 pound/foot^2 pound/inch^2 torr inlet pressure (Pi) pascal atmosphere bar dyne/centimeter^2 foot of water inch of mercury inch of water kilonewton/meter^2 millibar millimeter of mercury newton/meter^2 pound/foot^2 pound/inch^2 torr valve closing time (t) second century day decade hour millisecond minute week year flow velocity (V) meter/second centimeter/hour centimeter/second foot/day foot/second inch/hour inch/second kilometer/hour kilometer/second knot mach sea level 15 C meter/day mile/hour mile/second millimeter/second speed of light in vacuum yard/second

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#### Conversions:

 pressure increase (P) = 0 = 0 pound/inch^2 inlet pressure (Pi) = 0 = 0 pound/inch^2 valve closing time (t) = 0 = 0 second flow velocity (V) = 0 = 0 foot/second

#### Solution:

 upstream pipe length (L) = HAS NOT BEEN CALCULATED

#### Other Units:

Change Equation
Select an equation to solve for a different unknown

maximum surge pressure head
 maximum surge pressure head in length of fluid pressure wave velocity fluid velocity change acceleration of gravity

maximum surge pressure for a fluid
 maximum surge pressure for a fluid pressure wave velocity fluid velocity change unit weight of fluid acceleration of gravity

maximum surge pressure for water
 maximum surge pressure for water pressure wave velocity water velocity change acceleration of gravity

water hammer pressure increase
 pressure increase flow velocity upstream pipe length valve closing time inlet pressure

References - Books:

National Resources Conservation Service. National Engineering Handbook. 1995. United States Department of Agriculture.

by Jimmy Raymond

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