300 gallon tank & 68 psig

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In summary: I: In summary, if you have two tanks of different volumes with a partition between them and one of the tanks leaks, the pressure in the leaking tank will decrease while the pressure in the unaffected tank increases. Eventually they will equalize and be at the same pressure.
  • #1
tosh382
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I have a double wall steel tank system, where the inner sealed tank is 300 gallons and the outer sealed tank is 600 gallons.

If the inner tank holds 68 psig and begins to leak and the pressure goes out into the outer tank also, is it still 68 psig? If not, is it directly proportional, such that the pressure would become 34 psig?
 
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  • #2
The problem is ill-posed.

Is the volume between the inner and outer tank shells 600 gal, or does the 600 gal enclosed by the outer tank also include the inner tank?

What is the initial pressure between inner and outer tanks?


All else the same, pressures equilibrate.
 
  • #3
Also the leak might work as a throttle valve and therefore, the overall pressure might be less. But basically the problem is Tank A (68 psig, 300 galons) and Tank B (0 psig, 300 gallons) are separated by a partition. What would be the overall pressure after removal of the partition?

Is this the problem?
 
  • #4
tosh382 said:
I have a double wall steel tank system, where the inner sealed tank is 300 gallons and the outer sealed tank is 600 gallons.

If the inner tank holds 68 psig and begins to leak and the pressure goes out into the outer tank also, is it still 68 psig? If not, is it directly proportional, such that the pressure would become 34 psig?

If you have one tank (with air in it I presume) with a volume of 300 gallons at 68 psig sitting inside another tank with a volume of 600 gallons and 0 psig and the inner tank leaks, the pressure in the inner tank will not stay the same. It will decrease while the outer tank increases. Eventually they will equalize and be at the same pressure (inner tank lower, outer tank higher, from original pressures).

If you assume it is an ideal gas that undergoes an isentropic process the relationship will be [tex] Pv^k = constant[/tex] where k is the ratio of specific heats of the air (typically 1.4).

CS
 

1. What is the capacity of a 300 gallon tank?

A 300 gallon tank has a capacity of 300 gallons, or approximately 1136 liters.

2. What does the pressure rating of 68 psig mean for a 300 gallon tank?

The pressure rating of 68 psig means that the tank is designed to withstand pressures up to 68 pounds per square inch gauge, which is the difference between the pressure inside the tank and atmospheric pressure.

3. How does the pressure rating affect the safety of a 300 gallon tank?

A higher pressure rating means that the tank is built to withstand greater internal pressures without rupturing, making it safer to use for storing pressurized liquids or gases.

4. Can a 300 gallon tank hold more or less than 300 gallons of liquid?

A 300 gallon tank can hold up to 300 gallons of liquid, but it is not recommended to fill it to its maximum capacity as there needs to be space for expansion due to pressure changes.

5. What is the typical use for a 300 gallon tank with a 68 psig pressure rating?

A 300 gallon tank with a 68 psig pressure rating is commonly used for storing and transporting compressed gases, such as propane or carbon dioxide, or for storing liquids that need to be pressurized for certain applications.

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