Do I Need to Apply Atmospheric Pressure in Tank Analysis?

[jmex]

Hello all,

I am trying to understand the inputs here. Let's suppose I have a water tank at home which is made of plastic. It is filled with water. So I am confused with the inputs.
At first when I gave only hydrostatic pressure, the tank was safe. But when I added atmospheric pressure by applying pressure condition on internal surface by 14.59 psi, it was failing. So do I have to apply atmospheric condition? Is it true?

Thanks,
Jmex

 

[Dr.D]

What do you have outside the tank? Air at atmospheric pressure? Water under pressure? Something else?

 

[jmex]

Tank is open to atmosphere. Water is not under any other pressure except open to atmosphere.

 

[Chestermiller]

Tank is open to atmosphere. Water is not under any other pressure except open to atmosphere.

Then your first answer was correct.

 

[jmex]

that means i do not have to apply atmospheric pressure?

 

[Chestermiller]

that means i do not have to apply atmospheric pressure?

Correct.

 

[jmex]

ok. thanks.