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Pipe safe?

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Pipe safe?

Unread postAuthor: TollBooth » Sun May 24, 2009 10:51 pm

Alright. my first cannon was a success " the light saber" which was the old spray n pray type. which was rather more complex with fan and inter graded firing system. but really how advance can it get. I want to move up and create an advance propane chamber, But my only choice of pipe from home depot is various size pipe but anything above 2.5 in says "not for pressure" written on the side. Wondering if this is safe or should i keep searching..? i know its solid pipe. not the half filled with foam stuff. i was going for 3 in chamber.
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Unread postAuthor: inonickname » Sun May 24, 2009 10:58 pm

Try an irrigation or farm supply source. It's safer to use rated pipes. Or even ask them to get it in for you.
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Unread postAuthor: Technician1002 » Sun May 24, 2009 10:59 pm

Somewhere I have a thread where I test the black stuff.

Generally ABS is ok for standard combustion stuff. PVC is brittle and is prone to shattering.

Here is a thread on testing the Not for Pressure stuff.
http://www.spudfiles.com/forums/abs-cellular-core-test-cannon-t17968.html
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Unread postAuthor: boom_o_matic_2.0 » Sun May 24, 2009 11:23 pm

yea I was kinda worried about my rifle. after I got it together I was looking at a piece of pipe that was extra from the tank. its 2" sch 40 pressure rated at 280psi...but about a foot away from that it says PVC-DWV...so I'm not really sure what to belive...
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Unread postAuthor: TollBooth » Sun May 24, 2009 11:32 pm

I have that same problem.
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Unread postAuthor: starman » Sun May 24, 2009 11:51 pm

boom_o_matic_2.0 wrote:yea I was kinda worried about my rifle. after I got it together I was looking at a piece of pipe that was extra from the tank. its 2" sch 40 pressure rated at 280psi...but about a foot away from that it says PVC-DWV...so I'm not really sure what to belive...


Believe the pressure rating. Just because the Letters D W V appear on product doesn't mean it isn't pressure rated. If you see a rating, you're in good shape.
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Unread postAuthor: boom_o_matic_2.0 » Sun May 24, 2009 11:57 pm

ok good. I just didnt want my cannon to send shards of plastic into my face at 100psi. lol.
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Unread postAuthor: Moonbogg » Mon May 25, 2009 1:56 am

boom_o_matic_2.0 wrote:ok good. I just didnt want my cannon to send shards of plastic into my face at 100psi. lol.


I've seen several videos of combustion cannons blowing up and I am convinced that serious injury, while possible, is actually pretty unlikely. You might lose a finger or something but nothing major should happen.
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Unread postAuthor: Technician1002 » Mon May 25, 2009 1:59 am

boom_o_matic_2.0 wrote:ok good. I just didnt want my cannon to send shards of plastic into my face at 100psi. lol.


Safety glasses are highly recommended on anything that may go boom nearby.
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Unread postAuthor: jook13 » Mon May 25, 2009 3:14 am

I have seen plenty of advanced propane cannons made from ABS. I say you should be fine going that route.
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Unread postAuthor: boom_o_matic_2.0 » Mon May 25, 2009 8:47 am

Moonbogg wrote:
boom_o_matic_2.0 wrote:ok good. I just didnt want my cannon to send shards of plastic into my face at 100psi. lol.


I've seen several videos of combustion cannons blowing up and I am convinced that serious injury, while possible, is actually pretty unlikely. You might lose a finger or something but nothing major should happen.


losing a finger isnt serious at all. :lol:
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Unread postAuthor: spudtyrrant » Mon May 25, 2009 2:30 pm

yeah losing a finger sound pretty serious to me to lol
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Unread postAuthor: Technician1002 » Mon May 25, 2009 7:57 pm

spudtyrrant wrote:yeah losing a finger sound pretty serious to me to lol


:D It depends if it my finger or not. :D
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Unread postAuthor: Hotwired » Tue May 26, 2009 5:28 pm

Technician1002 wrote:
spudtyrrant wrote:yeah losing a finger sound pretty serious to me to lol


:D It depends if it my finger or not. :D


Pff, you've got eight plus thumbs and then after that there's toes, you can afford to lose a couple :P
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Unread postAuthor: boom_o_matic_2.0 » Tue May 26, 2009 10:07 pm

nah. the guy on valkarie had one hand with 3 fingers on it and 1 eye. lol. you'll be fine.
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