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PostPosted: Sun Dec 22, 2013 2:20 pm 
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Joined: Mon Jun 24, 2013 6:54 pm
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I often wondered if anyone is doing this and what charge pressures they dare store.
All my Co2 tanks came with a 3k burst disk installed, yet the tanks are all roll stamped to 1800 psi.
I know a safe bet is double rated tanks for stored pressure, but am a bit confused by the burst disk rating compared to the 1.8k on the tank.

If the tanks are stamped 1.8k is design failure 3.6k thereby justifying a 3k -/+100psi burst for 500/700 psi margin?
Seems a bit narrow for public consumption, and I have no plans to jack a Co2 tank to 3k, but obviously the disk is designed for that as common safety, so what is the truth about 1.8k rated tanks?


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PostPosted: Sun Dec 22, 2013 2:30 pm 
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Location: Coalmont BC
Tanks are hydrotested to 5/3 the rated pressure, and the burst disc reflects that.... An 1800 psi tank is tested to 3000 psi and fitted with a 3K disc.... That means they are designed to be used at 1800 psi, NOT 3000 or higher.... DO NOT use a CO2 tank for more than 1800 psi.... Their failure point SHOULD be more than 3000 psi, but the only time they should see that pressure is when filled with a liquid (the "hydro" in hydrotest) so that if they burst they don't go off like a bomb....

Bob

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PostPosted: Sun Dec 22, 2013 3:54 pm 
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most co2 burst disks i have blown at 2400-2500psi roughly , i feel safe using them 2000 psi .anyone who has looked at the burst disk would realize just how much the bottle could take and with a burst disk in place the bottle should never explode .... should never:)


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PostPosted: Sun Dec 22, 2013 6:44 pm 
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Location: Nova Scotia, near Halifax
DO NOT use a CO2 tank for more than 1800 psi.
i agree, no hpa!!!

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PostPosted: Sun Dec 22, 2013 6:45 pm 
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I've used them to 1800 psi for HPA, but not beyond....

Bob

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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsonal;
Too many! Springers, Pumpers, CO2, but I love my PCPs and developing them!
Proud Member of the 2000+fps Club!


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PostPosted: Mon Dec 23, 2013 12:11 am 
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Joined: Mon Jun 24, 2013 6:54 pm
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My goal with this question was to fish for folks who had done it and what made them survive.
I have a regulated bottle, but for those days I take the airgun to the range it would be preferable to tether a 20oz Co2 bottle unregulated then to take a pump if I shoot so much I drop below regulated on the main bottle.
1.8k is plenty of backup in a 20oz bottle, I'd be out of pellets first.

Good info for a small bottle inline to extend a hunting trip too.


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