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is sch40 rigid pvc conduit pressure rated and if so what to

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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is sch40 rigid pvc conduit pressure rated and if so what to

Unread postAuthor: 666lucky693 » Sat Jul 07, 2007 4:08 pm

i need to know cause im gonna make a cannon and i have some laying around
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Unread postAuthor: mopherman » Sat Jul 07, 2007 4:10 pm

i wouldnt use use it. conduit isnt meant for pressure. just spend the extra buck and get pressure pipe
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Unread postAuthor: 666lucky693 » Sat Jul 07, 2007 6:24 pm

yea i know i just had it laying around thanks for the help i just wondered cause it says sch-40 on
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Unread postAuthor: pyrogeek » Sat Jul 07, 2007 7:09 pm

What conduit would be good for though, is ram rods, handles and stuff like bipods, spark strips or mounts for ignition boxes. Or, there are always all kinds of things to make like lawn furniture, or maybe a shooting gallery for your guns? Maybe a gun rack?

I think I have seen people use it before without trouble. But, I don't think it's pressure rated. Get some proper pipe and just find another use for the conduit. It shouldn't be hard.
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Unread postAuthor: 666lucky693 » Sun Jul 08, 2007 12:47 pm

yea i know im using it for a barrel now its pretty good
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Unread postAuthor: rednecktatertosser » Sun Jul 08, 2007 1:12 pm

So using it for a barrel works? cause i was thinking about getting 2.5" conduit for a barrel but i didnt think it would work cause its not pressure rated. And yes i know the barrel only taakes a short burts of pressure, but better safe than sorry, no?
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Unread postAuthor: noname » Sun Jul 08, 2007 1:52 pm

Anything's fine for a barrel; I've used cardboard tubing that paper towels come on.
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Unread postAuthor: Gepard » Sun Jul 08, 2007 2:26 pm

No it isn't. If the projectile gets stuck and isn't completely at the bottom of the barrel then the (non pressure rated) barrel is exposed to the 100+psi you have the cannon at.

Michael
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Unread postAuthor: altxf4 » Thu Jul 26, 2007 12:27 am

I work for a large public works landscaping comapany and we use 1.5 and 2" conduit a lot! We use 60-100psi of air trough a 1/2" ball valve to run pull line through the conduit. We have blown the conduit apart many times when running string....and this is with just cuping our hand over the pipe with the ball valve between out thumb and index finger.


I personally say NEVER Use Conduit as ANY part of a Spud gun!!! ok a handle might be okay, but only if there is no pressure to it!
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Unread postAuthor: frankrede » Thu Jul 26, 2007 12:50 am

altxf4 wrote:I work for a large public works landscaping comapany and we use 1.5 and 2" conduit a lot! We use 60-100psi of air trough a 1/2" ball valve to run pull line through the conduit. We have blown the conduit apart many times when running string....and this is with just cuping our hand over the pipe with the ball valve between out thumb and index finger.


I personally say NEVER Use Conduit as ANY part of a Spud gun!!! ok a handle might be okay, but only if there is no pressure to it!
wait, so it blew when you only sealed it with your hand?
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Unread postAuthor: Modderxtrordanare » Thu Jul 26, 2007 2:06 am

yea i know i just had it laying around thanks for the help i just wondered cause it says sch-40 on


SCH40 isn't a pressure rating, it's merely a rating on the wall thickness of the particular piece of pipe.

Gepard wrote:No it isn't. If the projectile gets stuck and isn't completely at the bottom of the barrel then the (non pressure rated) barrel is exposed to the 100+psi you have the cannon at.

Michael


Well, if you're using a projectile like a potato in your (potato) gun, then your hypothetical situation wouldn't really matter. As the potato would just blow to bits.

I'm using a SCH40 barrel for my hybrid.
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Unread postAuthor: altxf4 » Thu Jul 26, 2007 5:49 pm

[/quote]wait, so it blew when you only sealed it with your hand?[/quote]

Yup! Its happened in different temperatures, ans has only blown above ground portions of pipe.

I think we still have a piece of one that blew right by a workers hand and hurt him...might take a picture of it.
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