rgarrett wrote:

I would like to make a small cauldron from a 20 lb propane cylinder. The
valve has been removed and the tank rinsed clean and dry. I am looking for
suggestions regarding how to cut it in half. I do not have access to a
torch. Thanks.

It is very possible to make this cut reasonably safely and cleanly using the
edge of a thin grinding wheel. If I were going to do this, I'd use a cutoff
grinder and 3" wheel. This is one of the cheapest air tools in existence, it's
trivial to find them priced under $10. If you have shop air, this is a great way
to go. Once you're done cutting your cylinder save the cutoff grinder for a way
to quickly unweld things. If you don't have shop air, then I suggest a 4-1/2"
angle grinder. Lots of varying opinions on these, but the orange one from HF (at
all costs do NOT get the blue one) at under $20 is a decent tool.

It is *really* easy to screw up cutting something with the edge of a grinding
wheel. Be really careful, wear ear, eye, hand & body protection, clamp the tank
down well (chain & turnbuckles work great) and do a little at a time, and HANG
ONTO THE GRINDER. Don't let your attention wander, and don't let any small kids
come around while you're doing this.

I really hope you learned about rinsing the tank out with a cup or two of
household bleach in a quart or two of hot water, the bleach breaks down the
ethyl mercaptan (the skunk smelling stuff) and afterwards it may not smell sweet
but it is way less offensive.

GWE