Is it safe to finally put down liquefied gas cylinders?

Not safe. The main components of liquefied gas are ethane, propane, butane and pentane. . Octane and other components have high vapor pressure in the front, which is easy to volatilize, but at the bottom of vapor pressure in the back, which is not easy to volatilize, and its maximum vapor pressure is certain at a certain temperature. For example, under the condition of 25 degrees, the maximum pressure in the new liquefied gas bottle is about 4 kilograms, and the main contributors of vapor pressure are ethane and propane. When their volatile vapor pressure is used up for a certain period of time, ethane and propane are gone, and the pressure of butane and pentane is low, such as 2. . . . After butane and pentane are used up, the pressure of the gas cylinder is even smaller, such as 0.5 kg. . . Finally, at the same temperature, you find that the pressure of the gas cylinder is too small to use, so you have to replace it with a new one. In fact, if the ambient temperature rises, the pressure in the bottle will also rise rapidly, and the gas can still be used, but it is not easy to control, it is too dangerous, and something will happen. If the bottle is finally turned upside down, the residual liquid in the bottle may directly flow out and vaporize, which is very dangerous, because 1 liter of liquid will vaporize directly, its volume will increase by 400-600 times, and it will explode instantly, with obvious consequences. . . . Is it safe? Definitely not.