The correct filling of gas cylinder is one of the keys to ensure the safe use of gas cylinder. Improper filling, such as gas mixing and excessive filling, is dangerous.

Gas mixing means that two gases or liquefied gases are loaded into the same cylinder. The most common mixing phenomenon is the mixing of combustion gases such as oxygen and combustible gases, such as the original cylinder filled with combustible gas (such as hydrogen, methane, etc.), without replacement, cleaning and other treatment, and there is still gas in the bottle, and it is used to fill oxygen. If the biochemical reaction of these two media is carried out under suitable conditions, serious explosion accidents will be caused. Therefore, gas mixing is never allowed.

Overloading is also a common cause of cylinder rupture and explosion. The overfilled cylinder is affected by the ambient temperature, especially in summer, the liquefied gas in the cylinder expands rapidly due to rising temperature, which makes the pressure in the cylinder increase sharply, causing the cylinder to burst and explode.

In order to prevent overloading of gas cylinders, the following aspects should be done. Special personnel should be responsible for the filling work, and the filling personnel should receive regular safety education and assessment; The filling personnel should operate carefully, shall not leave the post without authorization, and pay attention to evacuate the remaining liquid and verify the weight of the bottle. The weighing apparatus used for liquefied gas filling is checked at least once every 3 months, and the maximum weighing value of the weighing apparatus used is 1.5 to 3 times the common value. Card by bottle, careful record. The cylinder should be filled with a special person responsible for repeated weighing. If the device is equipped with automatic metering equipment, the excess can automatically alarm and cut off the valve.