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Questions over safety regarding 12 grams Co2 & Steel Pip

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: Blitzen » Wed Apr 16, 2008 9:10 pm

How come all these other people (not only the ones shown in the pics, but ones from other forums) think that they can hook up a 12g Co2 Canister to a metal airchamber and since its metal, there is no way it can burst like a PVC chamber?
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Unread postAuthor: judgment_arms » Wed Apr 16, 2008 9:15 pm

Ignorance is bliss, until something blows up in your face.
Some of them may use high pressure fittings, others hydraulic fittings and tube, still others like carrying bombs around. :)
But mainly it’s ignorance.
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Unread postAuthor: Blitzen » Wed Apr 16, 2008 9:21 pm

Ah, is there anywhere online where I could order like a 12" section of a super super super high pressure pipe fitting. Basically what I am trying to do is build a compact cool looking paintball grenade launcher.
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Unread postAuthor: judgment_arms » Wed Apr 16, 2008 9:24 pm

Blitzen wrote:Basically what I am trying to do is build a compact cool looking paintball grenade launcher.

Aren’t we all? :D
Try McMaster-Car.
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Unread postAuthor: Blitzen » Wed Apr 16, 2008 9:34 pm

What do you suggest? Brass? Iron? Steel?
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Unread postAuthor: biged » Thu Apr 17, 2008 5:47 am

Steel.

Some of them may use high pressure fittings, others hydraulic fittings and tube, still others like carrying bombs around.


Actually steel fittings leak. There is no catastrophic event.
A unrated line or connection would fail upon initial pressurization, and leak.

Even cutting steel 2000-3000 psi air lines just leak. Steel is not as brittle as PVC.
Welding pressurized air lines (and flammable gas) is real difficult. :wink:

///ed///
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Unread postAuthor: judgment_arms » Thu Apr 17, 2008 12:44 pm

I thought the threads would fail and a fitting would blow off; not a bomb, but dangerous none the less.

Oh well, as my grandma puts it, "the day you stop learnin’ is the day you die." :D
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Unread postAuthor: biged » Fri Apr 18, 2008 5:15 am

If a massive volume suddenly dumped from a large tank into a unrated fitting I can see the fitting failure and the object spinning and maybe taking flight. Anyone with access to such volumes would know better than to fill a experimental tank (Gun) with a massive pressure dump.

If it were pressurized from a high-pressure hand pump it would leak within 10-20% of the fittings' rating. It would simply hiss and the pressure would drop.

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