Hotwired wrote:It'll be fine as long as that burst disk isn't to make it a hybrid chamber of any note.
I'm completely serious when I say I've seen vessels of similar shape, integrity and material to canteens fail at under 100 psi, and far less under repeated or shock loads - and of course, combustions would provide both.
If it's done I give it a very real chance of breaking apart around the "equator" between the two sides. It might not be a failure that would cause injury, but it would still be rendered useless.
I don't know what experience you have with uneven cross sectioned pressure vessels, but I've done enough testing of them to know to avoid them like the plague.
As there are far safer, more practical, and less gimmicky materials which are far better suited to the task of being a pressure chamber than this, I strongly recommend against it's use - not because it will fail and cause injury - for the chances of that in this case are small - but because it runs a far greater chance of becoming a waste of money and materials.