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Hope this works the second time. We crewed for a hot air balloon. We heated the propane tanks when it was cool or cold out. We used heat tapes like you use on water pipes and then wrapped them in sleeping blankets[cheap ones]. We never had any issues with that set up. The idea was to keep the liquid hot so it would increase the pressure in the tanks. You would heat the tanks in the same way as to keep the propane in a gaseous state. We need gas and not liquid. Balloons want liquid and not gas. When cold,propane turns into liquid and will not work in our systems. Also there would be a pressure loss. How much pressure do you think there is when the tank sets in the compartment with the sun beating down on it or if setting outside. When ballooning we treated out tanks rougher then we do with the campers. Believe me on that. All you would need is the same tapes that we use on water pipes. Stiles, here we go again what a heating tape is.I dought that there would ever be a short in the tape or a issue with pressure. Keep us informed on what you do.
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