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ABS vs. PVC SCH40 for Combustion Cannons

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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ABS vs. PVC SCH40 for Combustion Cannons

Unread postAuthor: Dom » Sun Aug 06, 2006 7:58 pm

Hello, me again! But this time for the Combustion style of cannons.

I wanted to know what kind of pipes is recommended to use for those style of cannons?
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Unread postAuthor: Velocity » Sun Aug 06, 2006 8:14 pm

both
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Unread postAuthor: Dom » Sun Aug 06, 2006 8:16 pm

I know, but you know for PVC, there is the SCH40 or 80 rating.... is there the same thing for ABS or should I use normal ABS?
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Unread postAuthor: a-ron » Sun Aug 06, 2006 8:46 pm

abs isnt pressure tested so u wont get schedule 40 or 80 but abs is great for combustion cannons since they dont explode the just tear. pvc on the other hand can explode into shrapnel :shock:
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Unread postAuthor: Dom » Sun Aug 06, 2006 9:19 pm

So ABS is way better for Combustion as I can see... Perfect :)
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Unread postAuthor: drac » Sun Aug 06, 2006 10:33 pm

A PVC combustion cannon, when constructed properly will not burst from use as a normal combustion. As long as you don't pull any stupid crap, like acetylene or NO2, you'll be fine with either choice.
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Unread postAuthor: Dom » Sun Aug 06, 2006 10:35 pm

Oh I forgot to say :

PVC SCH40 or more is not avaliable in my region. Don't ask me why, I called every f-----g hardware store in the damn city, nada! :evil: Else I would of went Pneumatic.
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Unread postAuthor: CS » Sun Aug 06, 2006 10:53 pm

I actually prefer ABS pipe when it comes to combustions. The fact that its lightweight, and also works appeals to me. I dont know why you brang about this questions as it is clear you are stuck with one type of plastic piping.

As Drac said, both work. So you need to explore other pros and cons since the protection provided by both is suffient. Its like choosing to live in a 2x6 contstructed home or a bunker. Not to mention the black is "cool".
:wink:
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Unread postAuthor: Shrimphead » Mon Aug 07, 2006 4:45 pm

Just to clarify, Sch 40 or 80 or 120 aren't pressure ratings. They just specify the wall thickness of the pipe. Abs is usually sch 40 (from my experience) and is generally dwv (not pressure-rated). Some abs is even cellular core which means it is very weak and not suitable for any cannon.
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Unread postAuthor: Dom » Mon Aug 07, 2006 4:55 pm

Well from what I read... DWV is not suitable for cannons either..

So the Spud Dreams are down :(
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Unread postAuthor: drac » Mon Aug 07, 2006 5:05 pm

Spud dreams aren't down, you can use DWV in a combustion safely, that's what ABS is.
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Unread postAuthor: Dom » Mon Aug 07, 2006 5:12 pm

Well on every single site I went it insisted on the fact to NOT USE DWV. (Usually in bold and red :lol: ).
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Unread postAuthor: cannon freak » Mon Aug 07, 2006 6:00 pm

Look, for a combustion you can use DWV pipe such as ABS, for a pneumatic it is a big NO and is probably what the sites you have read are talking about.

I wanted to make a huge pneumatic but quickly learned that Pressure rated pipe is no where to be found where I live so I just made a big combustion out of ABS which holds up just fine.
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Unread postAuthor: Dom » Mon Aug 07, 2006 7:04 pm

Same for me! I couldnt find PVC SCH40 or 80 or anything in Ottawa... so I'm heading towards the good ol' combustion ;) Thanks very much. Now I know why DWV is acceptable for Combustion and not for Pneumatics.
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Unread postAuthor: Dom » Tue Aug 08, 2006 1:05 pm

I'm receiving bad news after bad news.

The only damn pipes I can find are ABS and they're f-cking cellular core.
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