Water Pressure Calculations

As Frank Crowe used to say, "It's just one dam equation after another."

Which sea?

Ha! you gave me a good chuckle. Thanks needed that

27.7 inch H₂O = 1 psi

But really, I think that might be too much help for a homework problem. Have you attempted to use the rest of the internet such as google??

Try typing "water column pressure calculation" into your favorite search engine and see what happens. I think you might be supprised at how easy it was to get exactly the information your looking for.

Thanks for the info. According to "Mikero" if you multiply 50 ft X 12 inch you come up with 600. So 600 divided by 27.7 = my answer. Hmmmmm?

I will try that other site on google that you mention.

Thank you Mike, I have been out of school since 1983. Don't give this stuff much thought any more

Wood I,

I don't know about you, but learning keeps me alive. I truly believe that the day I stop learning is the day I die. There is a wonderful wide world out there. There is an awesome community right here on CR4 waiting to be your friends. We welcome you and will help in any way we can.

Mike

Hey thanks Mike. Trust me, my mind never stops but I am more practical than theory.

Did you check out my video on you tube? "Second job for drill" , my buddy is running it in "Second job for Rodger" on you-tube. I am trying to think of a way to get rid of rain water. Actually trying to find work for my drill.

Any ideas.

Woody

The pressure is temperature sensitive.

The same pressure as with a 6" pipe. (if both pipes are fill to the same level)

Wouldn't it be the same pressure for a 1/2" pipe or a 12" pipe or any pipe, given that they are filled to the same level?

(Boy I hope i didn't just have a massive brain fart and make a fool of myself.)

Yes.

21.65 PSI

Would that be gauge or absolute pressure?

Now that someone has given you the answer in PSI, try and find what it would be in kilopascals

Thanks for the answer. My answer was 27 , but I would have thought it would have been much more. I'm trying to imagine holding up 300 + lbs of water from the bottom of a cylinder. But the area of the cylinder is what was fooling me. PSI , pounds per square in. How many sq inches in a 4in pipe.

Ya , I was being lazy.

thanks again

Holding up the whole pipe full of water would be hard work but imagine that you were just trying to plug a 1 inch square hole: you would need the 27 lb force, exactly the same as the force you would need to plug a 1 inch square hole at the bottom of a 50 foot deep reservoir.

Did you ask "how many square inches in a 4 in pipe"? Did you just ask that?

gauge

dont think about the area think about the height

pressure = Density x Height x Gravity

KPA=1000 x 15.24m x 9.81/1000

A very simple easy to remember 'rule of thumb' is 2' of water column = 1psi--which is within 15% of true answer. Any quick approximation within 15 % is sufficient for most of the calculations every performed because the needs and data are seldom more precise than +/- 10% Using 2.2'/psi is within 10%