What is liquid gas?
The main ingredient in liquid gas is propane. Like methane, propane is a colorless and odorless gas that is extremely flammable and explosive. Propane is explosive if 2-11% of the space is filled with gas. An explosion can even be caused by a spark caused by static electricity. Propane is not directly poisonous, but when it enters the air in large amounts, it can cause choking due to a reduction in oxygen content. When inhaled, it can cause drowsiness, nausea, feeling unwell, headache and weakness.
Propane is heavier than air, and therefore, when leaking, gas sinks into lower places - on the floor of the room, in cavities, cellars, drains, etc. Therefore, in the event of leakage, mainly lower apartments, basements are at risk.
In order for a person to understand how gas is leaking, small amounts of fragrances are added to household gases. The fragrances make smelling the gas easy. If the gas leak occurs in the underground gas piping and the gas rises through the ground to the surface odorants are filtered, and the characteristic odor is lost, which is why only a gas analyzer can detect the gas content in the air.
The gas explosion is characterized by the fact that at the moment the explosion also the fire that caused the explosion is dampened. This means that, as a rule, there is no fire after the gas explosion. This is due to two things: first, the explosion takes place in a very short time; other objects in the room cannot yet catch fire, and the burned gas itself goes out immediately. Secondly, the explosion in the room causes such a high pressure that it suppresses the flames. The resulting pressure is high enough to break down the weakest structures, and the gases can escape.
In order to reduce the impact of explosions, doors, windows and shutters are installed in gas installations in such a way that they open outwards and thus release explosive gases. Also, intermediate ceilings are made of lightweight panels, and glazed surfaces are increased. If the same conditions are met in other premises or in buildings where gas is used, the damages resulting from the explosion will be smaller. If there is a gas leak in the room, but there is no contact with the source of ignition, there will be a saturated mixture at some point (too much gas and too little oxygen), which is no longer flammable.