No disrespect intended, but If it were me, I might do a little more to ensure it was safe then pulling the plugs and dragging it into a fire. I haven't done this personally, so I am hesitant to offer specific directions, but have heard of multi faceted ways to ensure not only your safety, but the safety of those around you. They included some or all of the following:
- Evacuation of any propane left in them. Please remember, propane as a gas is heavier than air, and a tank without plugs can still contain propane, as it will pool in the bottom of the tank or in low spots on the ground. This can be a serious matter if ignited in a confined area (as represented by the inside of a tank)
- Filling the tank with water to push more of the gases out of the tank.
- The addition of a detergent to cut some of the smell (methyl mercaptan is added to make propane smell, and can coat the insides of the tank to make the smell linger even if no propane exists)
- letting the detergent and water slosh around and spill out the top of the tank in the back of a truck as you drive around.
- Draining the water
- Filling the tank with carbon monoxide by attaching your car (truck) exhaust via shop vac hose to completely fill the tank.
- Then cut.
Please research this completely, and don't do something that is unsafe and potentially hazardous to you and those around you. It would be sad to see your score on a tank turn into something other than the beautiful thing it is.
Just my $.02