Pressure in aerosol cans

[KBader]

Anyone out there know the pressure in an "average" aerosol can, and at what
pressure the average can will explode? I want to write an interesting gas law
problem for class so I only need approximate values. Thanks for any input.

Ken Bader
Conwell Egan Catholic High School
Fairless Hills, PA
Ken Bader
Conwell Egan Catholic High School
Fairless Hills, PA

[Uncle Al]

KBader wrote:
>
> Anyone out there know the pressure in an "average" aerosol can, and at what
> pressure the average can will explode? I want to write an interesting gas law
> problem for class so I only need approximate values. Thanks for any input.

Why not ask the manufacturers for exact numbers? There is contact info
on every can.

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[Marvin Margoshes]

It may not be as simple as applying the gas laws. The propellant is likely
to be a liquid at RT and moderate above-atmospheric pressure. To solve your
problem, one would need to know the vapor pressure of the propellant as a
function of temperature.

Uncle Al wrote in message <36BC6F...@earthlink.net>...

[Steve kavcak]

it's gonna be substantial- lest you blow a weld; believe thin-walled softdrink
cans take around 90+ psig before they start blowing out their bottoms.

KBader wrote:

> Anyone out there know the pressure in an "average" aerosol can, and at what
> pressure the average can will explode? I want to write an interesting gas law
> problem for class so I only need approximate values. Thanks for any input.
>

[Barry Hunt]

Steve kavcak wrote:

Most aerosol products are about 40 - 60 psig at ambient temp. Some up to 80 - 100
psig (usually with compressed gas, not liquified propellants).
Distortion pressure (popping the bottom or top) is always over 200 psig, usually
300 +. Burst pressure usually 400 +.
There are specific (and complicated!) requirements in Dept. of Trade regs (USA) and
in most countries.
regards Barry Hunt

[maurice]

As I recall, DOT requires all aerosol cans to be place in a 'hot tank' that
raises the internal pressure to 120 -130 psig before being shipped. This hot
tank is also called the leak tank since it is used to identify leakers on the
filling line.

maurice

[Alan W. Messing]

You could make an interesting, even relevant, problem by giving can dimensions,
bursting pressure @ some temp., and adding a piece of dry ice before sealing.
Lots of permutations -- empty can (no liquid), partially full can (solubility of
CO2 in water), etc.

Alan

[rrhi...@gmail.com]

I just did an experiment with silly string and found pressure using ideal gas law. Worked great. They calculated anywhere from 15 to 30 times atm.

[Libor 'Poutnik' Stříž]

Dne 09/02/2018 v 20:14 rrhi...@gmail.com napsal(a):

As cans use liquidized gas under pressure
( earlier freons, now propane+butane/isobutane mixture )
there is no way to properly apply ideal gas law.

Ideal gas can never become liquid,
as there is supposed no cohesive force between its molecules.

The pressure is determined by temperature,
growong exponentially, following exponential growth
of the partial pressure of the component vapours.


--
Poutnik ( The Pilgrim, Der Wanderer )

A wise man guards words he says,
as they say about him more,
than he says about the subject.