What is the max pressure a 14 oz bernzomatic style propane tank can hold?

I just looked on my Bernzomatic (14.1 oz)

228 is the service pressure, 286 is the test pressure.

printed right on he label on the blue canister.

Strange, maybe in Canada they just don’t need to print that info. That’s well within the limits for one of my projects, and probably a light air cannon too, but the main use would be setting up four or six of them together for a portable air tank, after draining them out, cleaning, drilling and tapping, etc.

I have some full ones but can’t bring myself to waste that much propane, even if it is cheap.

That is interesting. They’re made in Ohio, so I would think that they would bear US labels… but what do I know?

Yeah, they have the warning about not refilling them, and it being a federal offense under us code whateveritis, but no pressure rating, just the capacity.

The vapor pressure of propane at 50C is about 20 bar ~300 psi. .