boggen

02-05-2006, 12:18 AM

i been searching for math / formula, or a chart to go by. for sizing pipe for gravity feed situations.

looking for formula that makes scince to me. were i can either plug in the numbers and come up with the chart. a chart would be nice but it seems a chart be limited in amount of info that could be put into it.

i get 2" pipe is around 2000 max per 1" or :confused: draw down inches

i get 4" pipe is around 3000gph max per 1" or :confused: draw down inches

and many other variations of the above

from reading over at http://www.engineeringtoolbox.com/ i gathered some links from the site that might help someone. :confused: i have tried other sites but all the online calculators to other. just don't seem geared for what is wanted for a gravity flow gph for ponding.:mad:

the following pages come to mind in trying to figure out gravity flow. but what numbers and from what charts and from were.... concept and applying is just not there yet for me. :(

--------------------------------

formulas

gravity flow calculation

http://www.engineeringtoolbox.com/mannings-formula-gravity-flow-d_800.html

static pressure and head pressure (seems to deal with gravity)

http://www.engineeringtoolbox.com/static-pressure-head-d_610.html

--------------------------------

charts and other misc info.

friction loss pipe chart for sch 40 pipe

http://www.engineeringtoolbox.com/pvc-pipes-friction-loss-d_802.html

friction loss pipe chart for fittings

http://www.engineeringtoolbox.com/pvc-pipes-equivalent-length-fittings-d_801.html

for ID (inner diameter) of pvc sch 40

http://www.engineeringtoolbox.com/pvc-cpvc-pipes-dimensions-d_795.html

for ID (inner diameter) for hoses (gauge)

http://www.engineeringtoolbox.com/BWG-wire-gage-d_508.html

amount of flow (velocity) to have in pipe to keep stuff from setteling out.

http://www.engineeringtoolbox.com/slurry-transport-velocity-d_236.html

Geometric relationships like area, wetted perimeter and hydraulic diameter

http://www.engineeringtoolbox.com/flow-section-channels-d_965.html

density and weight of water

http://www.engineeringtoolbox.com/water-density-specific-weight-d_595.html

Air Pressure and Altitude above Sea Level

http://www.engineeringtoolbox.com/air-altitude-pressure-d_462.html

looking for formula that makes scince to me. were i can either plug in the numbers and come up with the chart. a chart would be nice but it seems a chart be limited in amount of info that could be put into it.

i get 2" pipe is around 2000 max per 1" or :confused: draw down inches

i get 4" pipe is around 3000gph max per 1" or :confused: draw down inches

and many other variations of the above

from reading over at http://www.engineeringtoolbox.com/ i gathered some links from the site that might help someone. :confused: i have tried other sites but all the online calculators to other. just don't seem geared for what is wanted for a gravity flow gph for ponding.:mad:

the following pages come to mind in trying to figure out gravity flow. but what numbers and from what charts and from were.... concept and applying is just not there yet for me. :(

--------------------------------

formulas

gravity flow calculation

http://www.engineeringtoolbox.com/mannings-formula-gravity-flow-d_800.html

static pressure and head pressure (seems to deal with gravity)

http://www.engineeringtoolbox.com/static-pressure-head-d_610.html

--------------------------------

charts and other misc info.

friction loss pipe chart for sch 40 pipe

http://www.engineeringtoolbox.com/pvc-pipes-friction-loss-d_802.html

friction loss pipe chart for fittings

http://www.engineeringtoolbox.com/pvc-pipes-equivalent-length-fittings-d_801.html

for ID (inner diameter) of pvc sch 40

http://www.engineeringtoolbox.com/pvc-cpvc-pipes-dimensions-d_795.html

for ID (inner diameter) for hoses (gauge)

http://www.engineeringtoolbox.com/BWG-wire-gage-d_508.html

amount of flow (velocity) to have in pipe to keep stuff from setteling out.

http://www.engineeringtoolbox.com/slurry-transport-velocity-d_236.html

Geometric relationships like area, wetted perimeter and hydraulic diameter

http://www.engineeringtoolbox.com/flow-section-channels-d_965.html

density and weight of water

http://www.engineeringtoolbox.com/water-density-specific-weight-d_595.html

Air Pressure and Altitude above Sea Level

http://www.engineeringtoolbox.com/air-altitude-pressure-d_462.html