You build a steel pipe cannon and pressurize it to 1500 psi.
You mount a copper cap/burst disk in a position that blows away from you if it bursts.
IOW A copper circuit breaker for air pressure.
I imagine that splitting copper is a lot better than shattering steel.
Has anyone photos or videos of bursting steel and/or copper?
"Burst Disc" safety device?
(im afraid of 120psi already ) 
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metalmeltr
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This is an interesting idea, however i think that the copper bursting could send hazardous shrapnel out if it bursts. I know that C02 tanks use a burst disc to prevent overpressurization, but I don't know what material they use. Is there not a commercially available pressure relief valve that will work in your operating range?
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joepage2008x2
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What is 1200psi for?
I know that brass is a very common material for burst disks - I think thats what is used with the little CO2 cartridges.
Pressure release valve is probably the safest option but I imagine them to be an expensive part if bought commercially because they are uncommon.
I know that brass is a very common material for burst disks - I think thats what is used with the little CO2 cartridges.
Pressure release valve is probably the safest option but I imagine them to be an expensive part if bought commercially because they are uncommon.
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Gippeto
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I believe the burst discs on "paintball" type tanks are copper.
You can get a relief valve (poppet style) for 1200psi...I've one in front of me set at 1500psi.
(needed model #)
http://www.swagelok.com/search/product_ ... S-4R3A5-BU
Not cheap though...I think when I last priced one out it was ~$150cdn buying it through the business.
A phone call would be in order.
You can get a relief valve (poppet style) for 1200psi...I've one in front of me set at 1500psi.
(needed model #)http://www.swagelok.com/search/product_ ... S-4R3A5-BU
Not cheap though...I think when I last priced one out it was ~$150cdn buying it through the business.
A phone call would be in order.
"It could be that the purpose of your life is to serve as a warning to others" – unknown
Liberalism is a mental disorder, reality is it's cure.
Liberalism is a mental disorder, reality is it's cure.
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boyntonstu
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My thinking is to make everything homemade if possible.Gippeto wrote:I believe the burst discs on "paintball" type tanks are copper.
You can get a relief valve (poppet style) for 1200psi...I've one in front of me set at 1500psi.
http://www.swagelok.com/search/product_ ... S-4R3A5-BU
Not cheap though...I think when I last priced one out it was ~$150cdn buying it through the business.
A phone call would be in order.
If a copper cap fitted to a short length of copper tubing would burst before the steel cannon to which it is attached, wouldn't that be sufficient?
BTW What do you use to pump high pressures?
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metalmeltr
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Most peple use a shock pump or comressor from a refigerator for high pressure. I personally feel that your idea of a piece of copper pipe with a cap is far too dangerous to serve as a safety device.
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boyntonstu
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????metalmeltr wrote:Most peple use a shock pump or comressor from a refigerator for high pressure. I personally feel that your idea of a piece of copper pipe with a cap is far too dangerous to serve as a safety device.
"I believe the burst discs on "paintball" type tanks are copper. "
What is the difference?
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metalmeltr
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Maybe I am misunderstanding how the copper would behave when it bursts, but i see shrapnel everywhere.
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Gippeto
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Stu, you can buy a burst disc at Walmart for a couple bucks. The difference is the thickness and diameter of the copper disc....and the fact that they are a KNOWN quantity.
To use them, you would need to drill and tap appropriately, as they do not use a tapered pipe thread, but seal on the lower edge....metal to metal.
If you decided to make one, the best idea I can suggest at the moment, is a pipe union (1/8"npt) fitted with foil discs. You'll need to experiment with it to determine how many disks you'll need, and I would suggest placing a pipe plug in the downstream end of the union to protect the disks from accidental damage.
Hydrostatic testing is to be preferred.
You will of course have to drill a small (1/8") hole through the pipe plug to allow any gas to vent.
Be very careful (should go without saying...but others read these posts too
) with the direction of venting as well.
To use them, you would need to drill and tap appropriately, as they do not use a tapered pipe thread, but seal on the lower edge....metal to metal.
If you decided to make one, the best idea I can suggest at the moment, is a pipe union (1/8"npt) fitted with foil discs. You'll need to experiment with it to determine how many disks you'll need, and I would suggest placing a pipe plug in the downstream end of the union to protect the disks from accidental damage.
Hydrostatic testing is to be preferred.
You will of course have to drill a small (1/8") hole through the pipe plug to allow any gas to vent.
Be very careful (should go without saying...but others read these posts too
) with the direction of venting as well."It could be that the purpose of your life is to serve as a warning to others" – unknown
Liberalism is a mental disorder, reality is it's cure.
Liberalism is a mental disorder, reality is it's cure.
http://paintballgateway.com/burstdiscs.html
they should be 1/8 npt. the fill nipple and gauges are 1/8 npt. i dont see how they seal any other way besides Teflon tape because the paintball regs are rounded
they should be 1/8 npt. the fill nipple and gauges are 1/8 npt. i dont see how they seal any other way besides Teflon tape because the paintball regs are rounded
paintball burst disk for a 3000hpa tank or 4500 usally burst at 5000psi
they are made from brass and believe me u dont want to be near a 4500psi carbon fiber tank when it burst or when it explodes because some dumbass puts triflow in the fill nipple
they are made from brass and believe me u dont want to be near a 4500psi carbon fiber tank when it burst or when it explodes because some dumbass puts triflow in the fill nipple
dont play with airsofter with 1000$ gun and play with a 5 dollar pair of glasses