Originally Posted by Byron Kinnaman
Tell that to my neighbor, propane tank went off in a fire. Tell that to the fire department. They would like a good laugh.
This doesn't explain it all, but heating the tank will release the propane and avoid a violent rupture of the tank. No system is perfect but that is the design. Handling and storing volatile gases of any kind presents some danger and must be taken seriously. Certainly not a subject for scorn or levity.
I won't argue with your position, but I will continue to store my trailer in my shop along with my torches and cars with gas tanks.
Industrial application does require storing excess cylinders of all volatile (actually even inert) gases to be caged or chained and stored outside or in ventilated cabinets. Cylinders in service are allowed indoor storage away from ignition sources.Propane powered forklifts are just one example.
Keeping greasy or oily rags stored in closed metal containers away from accelerants and flammables is also important.
BTW... I spent 35years in a fuels refinery where I was subjected to extensive fire safety training and was required to serve as a fire fighter.
It would not be wise to intentionally weld or cut on a propane cylinder or throw it into a fire... I did see an "empty" disposable cylinder explode once when my mentally challenged neighbor tossed it into a large burning brush pile. Empty cylinders can sometimes be more dangerous than full, and disposable perhaps more than refillables..
I'm not claiming expert status and I couldn't find better info without effort, so if the information below is not satisfactory,
Please continue to consider your position to be correct with my blessing.
Propane Tank Safety Relief Valves
The safety relief valve is one of the most important and vital valves on any LP Gas container. All propane tanks and cylinders are required by law to be fitted with pressure relief devices designed to relieve excess pressure. The function of a safety relief valve is to keep a propane tank from rupturing in the unlikely event of excessive pressure buildup. Propane tank relief valves are also known as pop off valves, pressure venting valves or relief valves.
How Propane Relief Valves Work
Relief valves are held in the closed position by the force of a powerful spring. As long as the pressure inside the tank is less than that of the spring, the valve will remain closed. If tank pressure rises to that of the spring, the valve will open resulting in a hissing sound outside the tank. If the pressure in the tank rises significantly higher than that of the spring, the valve will fully open. When the valve fully opens, it initially makes a loud pop followed by a blast of released propane gas. Once the pressure is released and the tank pressure falls below that of the spring, the valve closes.