I know that sch is not a pressure rating, I was wondering the minimum pressure rating I should use if I decide to make this. I will not be using any burst disks or pistons, just a simple combustion with low propane mixture fuel.

The pvc was pressure rated (don't recall what though) would be a good pressure rating to aim for (would it be like Gun Freak said with 120 psi) with using shots of propane for the fuel?
On a side note I thought that the only pvc that wasn't pressure rated was ones that don't have a sch rating or ...

I thought it would be fun to make a 6inch chamber with a 2 or 2.5 inch barrel, I've made a couple of 4-2 cannons already. I was never initially going to do this just because trying to find 6inch pipe is a pain and expensive, however I saw a piece the perfect length only sch 35, thats why I was ...

Something like this?: http://www.instructables.com/id/20000v- ... ansformer/

thanks, it wouldn't make any difference if i wrapped it in fiberglass right? I think I read it wouldn't.

I was browsing for some parts for my new spudgun I noticed some 6in pvc. The only problem is that it's SCH 35, would that be sufficient for a combustion chamber (will be using metered propane, no pressure mixes). Thanks