You must really think I'm some kind of idiot or something...
Before you spend any more time shooting your mouth, go read about BLEVE... watch some flaming LP cylinders fly, etc.
If you heat a tank that's storing a compressed liquid, short answer is you have a bomb waiting to vent somewhere. That's an entirely different scenario than venting an LP tank and nominal temperatures. As far as igniting vaporized propane... it's got nothing on pressurised propane. Once again, the basic principle of releasing stored energy is EXACTLY the same.