National Homebrew Club Ireland

General Discussions => Chit Chat => Topic started by: Rats on February 25, 2015, 12:15:50 PM

Title: Pressure in a keg
Post by: Rats on February 25, 2015, 12:15:50 PM
How much pressure can you put in a "Guinness" Keg before it explode?
Title: Re: Pressure in a keg
Post by: beerfly on February 25, 2015, 12:52:07 PM
Crazy dangerous Experiment time!!
Title: Re: Pressure in a keg
Post by: LordEoin on February 25, 2015, 03:34:29 PM
it should be printed into the metal, no?
Title: Re: Pressure in a keg
Post by: Garry on February 25, 2015, 03:59:17 PM
Rats, that avatar of yours looks like it's up to something??

Some good reading for you here (http://www.brewersassociation.org/wp-content/uploads/2014/04/Performance_Guidelines_for_Refillable_Kegs.pdf).

The table on page 12 shows the different design pressures used in different countries.

(http://i.imgur.com/qPly0js.png)
Title: Re: Pressure in a keg
Post by: Rats on February 26, 2015, 08:51:01 AM
tx for the info will have a look at it.
Title: Re: Pressure in a keg
Post by: DEMPSEY on February 26, 2015, 10:22:17 AM
Curious to know why you want to know this. Sounds like a question I might ponder while imbibing at a fine public establishment :). Goes along with question like "why does your skin go wrinkly when you are in the bath" :D.
Title: Re: Pressure in a keg
Post by: Jacob on February 26, 2015, 10:55:20 AM
@Rats: anything to do with steam?  :P
Title: Re: Pressure in a keg
Post by: Rats on February 26, 2015, 11:14:02 AM
Was thinking of using one as a portable air tank but will be looking for an old flogas cylinder.
Title: Re: Pressure in a keg
Post by: mcgrath on February 26, 2015, 12:26:39 PM
Quote from: Rats on February 26, 2015, 11:14:02 AM
Was thinking of using one as a portable air tank but will be looking for an old flogas cylinder.
you going to the moon?
Title: Re: Pressure in a keg
Post by: auralabuse on February 26, 2015, 06:40:24 PM
Quote from: mcgrath on February 26, 2015, 12:26:39 PM
Quote from: Rats on February 26, 2015, 11:14:02 AM
Was thinking of using one as a portable air tank but will be looking for an old flogas cylinder.
you going to the moon?
Out of interest, what do you use to cask condition beer, as in, plastic or metal kegs and where is best to get these.  Gonna do a cask beer over the summer if they are not too expensive
Title: Re: Pressure in a keg
Post by: Will_D on February 26, 2015, 10:41:40 PM
Just checked a 50L Heino and a 30L bud keg:

Both are rated to 3 bar max (42 psi).

Not sure what a gas cylinder is rated to (Butane(Yellow) and Propane(Red) ar eprobably less than 3 bar but they not be stamped with a max pressuree.

If you want a bottle that can withstand a lot of pressure:

What about a fire extinguiser or even:  Drum Roll: Flashing lights: etc:

A mixed gas bottle!
Title: Re: Pressure in a keg
Post by: Beerbuddha on February 27, 2015, 01:02:52 AM
The keg is pressure tested to 90 psi (6.3 bar) which gives it a safe working pressure of
60 psi (4.1 bar). Routine hydraulic tests to rupture are carried out and no keg should fail
below 1000 psi (70 bar) (Mitcheson M et al. 2001)

First time packaging classes has proved useful  ;D