Flowchart for filling liquefied petroleum gas cylinders

Check whether the safety accessories, safety valves, liquid level gauges, pressure gauges and thermometers of the tank car are complete, effective, sensitive and reliable. Check accessories, pumps, valves, pipes, etc. Whether the storage tank of the tank car is in good condition, and whether there is leakage, dripping and leakage.

Check whether the medium in the liquid storage tank is liquefied petroleum gas, and check whether the liquid level gauge and pressure gauge are normal and have excess pressure. New tankers or tankers filled for the first time after overhaul should be evacuated (vacuum degree is not less than 650 mm Hg) or filled with nitrogen.

Extended data:

Colorless volatile liquid obtained by pressurizing, cooling and liquefying refinery gas or natural gas is flammable. When the content of liquefied petroleum gas in the air reaches a certain concentration range, it will explode when it meets an open flame. Liquefied petroleum gas obtained from refinery gas is mainly composed of propane, propylene, butane and butene (which can be a mixture of one or more hydrocarbons).

It also contains a small amount of pentane, pentene and trace sulfide impurities. Among them, the carbonyl sulfide is removed by alcohol amine absorption tower, and the sulfide is eluted by alkali. Liquefied gas obtained from natural gas (including oil field associated gas) basically contains no olefins. The main product of stable operation of gasoline in refinery is liquefied petroleum gas. Can be used as engine fuel, household fuel, basic organic synthetic raw materials, etc.

Baidu encyclopedia-liquefied petroleum gas