There are a number of factors to weigh when storing a propane cylinder, but safety should be the overriding concern. Here's a short list:
Store tank outdoors in shaded area. Do not let tank get hot...
Purging a propane cylinder is done by first removing air in cylinder that has never had propane in it. Then cylinder is is filled with propane vapor appx. 15psi this vapor is then blown out. This...