A good way to make sure that the tank can not explode is to feed argon or another inert gas (I.E. CO2) into the tank. You can rent a full tank of argon or CO2 at a welders supply, and just feed the hose into the tank, and fill the tank, and keep the flow going while cutting. Of course a couple of rinsings with soap and water first wouldn't hurt...
Charbroil "Silver", Early Weber 22.5" "one touch" Platinum, with one table