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| socoj2 |
 Posted: 05/12/2008 21:31 PM Post subject: Volume of a Fitting |
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Master Sergeant
Joined: 29 Jun 2007
Posts: 151
354.24 Spud Bux
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So. for 1.5" pipe determining volume of a Fitting.
This is for a Stock that is mostly Fittings and not much pipe.
For a 90 Degree elbow it takes 1.5*Diameter of the pipe to complete the bend. *I THINK*
for a 1.5" pipe that would be 2.25" for an elbow.
for a 45 degree turn i think it is something like 1.46.... i cant remember.
Anyway is there a resource for helping calculate to the volume in fittings? |
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| Lentamentalisk |
| Posted: 05/12/2008 21:55 PM Post subject: |
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Resident Tinkerer
Joined: 07 Aug 2007
Posts: 614
209.68 Spud Bux
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Not sure what you are trying to say...
Why not just fill it with water and then measure how much fit in? |
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| jr |
| Posted: 05/13/2008 0:47 AM Post subject: |
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Sergeant First Class
Joined: 17 Aug 2006
Posts: 138
50.47 Spud Bux
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Lentamentalisk ....you hit the nail on the head!
Thats exactly what I do becuase it is to hard to calculate all that stuff.... |
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| psycix |
| Posted: 05/13/2008 5:08 AM Post subject: |
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Major General
Joined: 25 Jun 2007
Posts: 1362
221.28 Spud Bux
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If you really want to calculate the volume of a stock, then you can.
How to do this:
Precisely measure all distances, this should take a few hours for a whole stock.
Then divide everything into small pieces, an elbow for example consists of pieces of cillinders and a piece of a sphere.
This might take hours of calculation.
Next count it all up, and voila! Youve got your volume.
It may have taken a whole day, and because of measuring faults it isnt very accurate, but hey, you saved water! |
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| markfh11q |
| Posted: 05/13/2008 13:06 PM Post subject: |
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Donating Member
Joined: 06 May 2006
Posts: 1341
1317.45 Spud Bux
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Or...
Approximate the bends in the elbows with polynomials or other elementary functions, create a 2-d cross section on the xy coordinate plane, choose your endpoints carefully, and use the washer method to calculate the volume of the fitting.
Volume = the integral from a to b of, parenthetically, R2-r2, where a and b are the endpoints of the curves and R and r are your polynomial approximations.
Or...
Just do a fluid volume measurement. Even though some on this forum are mathematically capable of doing the above if provided a 2-d cross section of a fitting (which is elusive in the first place), mostly all would still just use the fluid volume measurement to save time and frustration. |
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