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Fire extinguisher tank

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: Gun Freak » Thu Jul 22, 2010 10:46 am

Good idea, anything else I could do? I think I'm putting paint in it soon anyway but I might not... I don't know yet.
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Unread postAuthor: irisher » Thu Jul 22, 2010 10:54 am

I am not sure about yours but all my fire extinguishers are aluminum so the whole paint thing is not that necessary.
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Unread postAuthor: Gun Freak » Thu Jul 22, 2010 11:03 am

Yeah mine is Al but won't Al rust?
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Unread postAuthor: irisher » Thu Jul 22, 2010 11:09 am

It will corrode eventually but aluminum resists much better than steel because its oxidation is tough and stays on.
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Unread postAuthor: Ragnarok » Thu Jul 22, 2010 11:09 am

No, it doesn't "rust" (although, being pedantic, rust is specifically oxidised iron). The oxide coating that forms on aluminium is protective.

Basically the top few molecules oxidise (very fast, given aluminium's reactivity), but then that top layer prevents oxygen getting to the lower layers.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: Gun Freak » Thu Jul 22, 2010 11:11 am

So there is no need for that valve thing we were talking about or coating the inside with paint?
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Unread postAuthor: irisher » Thu Jul 22, 2010 11:21 am

I guess it wouldn't hurt but its not critical.
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Unread postAuthor: POLAND_SPUD » Thu Jul 22, 2010 11:42 am

no need for that valve thing
well it won't corrode but water will condensate inside the tank... if I were you I'd just mount it upside down
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Unread postAuthor: Gun Freak » Thu Jul 22, 2010 12:03 pm

I can't mount it upside down:
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Unread postAuthor: Gun Freak » Thu Jul 22, 2010 12:08 pm

New epoxy is curing. I used two part syringe type, slobered it all over where the tiny leak was a stuck the vaccum onto one of the 1/4" ports. There was no noticeable amount of epoxy being sucked into the leak but who knows, maybe this will be the final time I need to try to seal it. How long should I wait to test it? The package says 5 minute but I don't know if that is cure time or whatever...
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Unread postAuthor: POLAND_SPUD » Thu Jul 22, 2010 12:20 pm

ohh well... :?
I thought you wanted to use it as an air reservoir and that it is much larger... you won't have any problems with it
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Unread postAuthor: clemsonguy1125 » Thu Jul 22, 2010 12:23 pm

Gun Freak wrote:New epoxy is curing. I used two part syringe type, slobered it all over where the tiny leak was a stuck the vaccum onto one of the 1/4" ports. There was no noticeable amount of epoxy being sucked into the leak but who knows, maybe this will be the final time I need to try to seal it. How long should I wait to test it? The package says 5 minute but I don't know if that is cure time or whatever...

Mine is called 5 minute epoxy but the back says 2 hours till total strength, Id give it at least 2 hours.
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Unread postAuthor: Gun Freak » Thu Jul 22, 2010 12:25 pm

OK I'll give it overnight just to be safe.
@Poland I think I already mentioned that it was a bbmg tank :wink:
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Unread postAuthor: POLAND_SPUD » Thu Jul 22, 2010 12:56 pm

yeah I know... my fault
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Unread postAuthor: Gun Freak » Thu Jul 22, 2010 1:00 pm

1+s c001 h0^^13 d@vvG yo :D lol
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