What to do in case of a fire caused by liquefied gas
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After a fire is caused by liquefied gas, should one extinguish the fire first or turn off the liquefied gas first?
When conditions permit, the valve must be closed first; otherwise, even if you extinguish the fire, explosive gases may still form and cause an explosion. :lol :handshake
Of course, turn off the valve first if it’s possible to do so! When the valve is located in the area where a fire is occurring, it’s necessary to extinguish the fire first; only after that can the valve be turned off. If it proves impossible to close the valve, it’s necessary to reignite the leak site in order to prevent gas buildup from reaching the explosive limit. At the same time, the container walls need to be cooled down
Use it flexibly depending on the circumstances; there’s no fixed order in which things must be done first
Of course, turn off the gas first. In reality, it usually doesn’t work, as the fire is right near the valve; therefore, the area around it is extremely hot. In such cases, it’s impossible to shut off the valve, and ordinary carbon dioxide fire extinguishers also cannot put out the fire. Because he is under pressure. The only way is to evacuate the crowd first, wait until the source of the gas is located and it is shut off, and then extinguish the fire again once the pressure has dropped. After extinguishing, the air cools naturally. If it is a liquefied gas cylinder, there is nothing to do but wait until the pressure inside drops. Generally, people need to be evacuated first; as long as there are no other flammable materials in the vicinity, there should be no major problems.
In the case of a gas fire, it is necessary to cut off the gas supply first; if attempts are made to extinguish the fire first, the ongoing leakage of gas can lead to a secondary explosion.
It’s better to close the valve first, of course, if it’s possible to do so. For fires involving steam, use steam to extinguish them. If a gas cylinder is on fire, do not rush to cool it with water; let it cool down naturally first before taking any action.