"...quite a potent blast..." Not with propane. Propane is really boring stuff. Poke a hole in the tank, even with a rifle bullet, nothing happens except for the nice, fluffy, white cloud that spreads out over the ground. Trave does nothing either. It takes an incendiary to light it. Then you get a nice fireball, but no explosion. The Night Tracer Festival at Second Chance, long ago was really dull until Dickie Davis fired the .50 BMG APTI. There was gasoline, fireworks, a fridge and a bunch of 100 and 25 pound propane tanks. Not one of the tanks moved an inch after the great big fireball died out in a matter of minutes.
If you're concerned about your insurance, like clang says, call your agent. Your agent isn't the evil, blood sucking, rat, son of unmarried parents. The self-regulating, meddling, lying, rat, misbegotten insurance companies are.