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how to increas psi in a pressure pipe

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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how to increas psi in a pressure pipe

Unread postAuthor: truth3570 » Thu May 17, 2007 3:04 pm

any of you guys know of a way to make a pipe hold more presure :?: :?: :?: if you did I'd realy like to know
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Unread postAuthor: MrCrowley » Thu May 17, 2007 3:07 pm

We can't make pipe hold more pressure but you can re-inforce it if it chooses to blow up on you, but its very dangerous and it will be alot better if you use pressure rated pipe, and you will feel 100x safer when shooting the gun knowing that your using pressure rated pipe not past its rating.
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Unread postAuthor: Pete Zaria » Thu May 17, 2007 3:21 pm

MrCrowley is right, there really is no way to make a piece of pipe hold more pressure. Embedding it in concrete would probably work, but would also make it completely useless.

There's some debate about double-layering pipe (by using couplers with the ridges filed out), but I don't think it would significantly increase bursting pressure. It's a bad idea to bet on.

As MrCrowley said, the best thing to do is to use pressure rated pipe.
People have tried everything you can think of to build a "shrapnel shield" around their chambers; some of these have actually created even more shrapnel rather than helping to contain it.

Do the smart, safe thing; save up the money for pressure rated parts, and call around/research until you find a local, reasonably inexpensive place to buy them. Try plumbing supply shops, irrigation/sprinkler shops, etc... not hardware stores.

Peace,
Pete Zaria.
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Unread postAuthor: mopherman » Thu May 17, 2007 7:52 pm

how much pressure do you think 3 inch sleeved into couplers sleeved into 4inch sleeved into couplers?
3inch<3 inch couplers<4 inch< 4 inch couplers
4 layers of pipe
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Unread postAuthor: turbohacker » Thu May 17, 2007 8:19 pm

like they just said, dont do it. Learn how to weld and use steel pipe, or use threaded brass pipe, both of which are probobly cheaper than four layers of pipe!
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Unread postAuthor: super spuder » Thu May 17, 2007 8:20 pm

umm, why would you want to do that, i think that would cost like over 30 $ for 1 meter of pipe :lol:
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trying to decide on a new project, probably something small.
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Unread postAuthor: turbohacker » Thu May 17, 2007 8:31 pm

are you talking about the metal pipe or the four layer thick PVC
because metal pipe only cost a couple bucks a foot for three inch 8)
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Unread postAuthor: mopherman » Thu May 17, 2007 9:18 pm

i dont plan on quadruple sleeving pvc. just a thought
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Unread postAuthor: truth3570 » Fri May 18, 2007 12:04 pm

wat about putting a metalcylinder around a pressur rated pipe
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Unread postAuthor: MrCrowley » Fri May 18, 2007 5:05 pm

Whats the point? If its pressure rated and you stay below the rating its not going to blow. Or why wouldnt you just use the metal cylinder if its pressure rated?
Spend a few hours reading up on stuff here:
http://www.spudfiles.com/spud_wiki/inde ... =Main_Page
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Unread postAuthor: Velocity » Fri May 18, 2007 5:56 pm

These little techniques (sleeving, etc) might affect the burst pressure, but it is difficult to tell. Honestly, the best thing to do is to buy the material that fits your purpose. You don't see PVC fittings being used on high pressure hydraulic systems; why should you use low pressure fittings on a high pressure application?
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