Dalian gas leak caused an explosion. What is the cause of the gas leak?

Using gas water heaters indoors with poor air circulation, dismantling and refitting indoor gas facilities without authorization, using naked flames and setting off fireworks near gas pressure regulating stations, pressure regulating boxes and gas manhole covers are likely to cause serious accidents such as gas poisoning, fire and explosion.

How to deal with emergencies? When gas leakage is found, cut off the gas source immediately and quickly open the doors and windows for ventilation. But the action should be gentle, so as to avoid the sharp friction of metal to produce sparks and cause explosion. When gas leaks, never turn on or turn off any electrical equipment, do not turn on the range hood or exhaust fan to exhaust, and do not make phone calls in a room full of gas to avoid sparks and explosions.

When gas leaks, you should leave the leak site immediately, and evacuate your family and neighbors quickly to prevent irrelevant personnel from approaching to prevent suffocation and poisoning. When the liquefied gas tank is on fire, it should be quickly pressed with soaked towels, bedding and clothes, and the valve of the liquefied gas tank should be closed immediately. Pay special attention not to use in-line gas water heaters that have been explicitly prohibited by the state.

If the home is uninhabited for a long time, turn off the gas valve for personal use and leave contact information to the property or housing management department. There should be many. Aging, poor quality and serious corrosion of pipelines will all lead to gas leakage. Our gas pipeline leaked once. At that time, we immediately called Chengsheng Gas Company, which was doing security check, and asked them to change the pipeline for us. Fortunately, it was found in time, otherwise the problem would be big. We must pay attention to the safety of domestic gas.

The main component of natural gas is methane. Methane is harmless to human physiology, but it has asphyxiating effect. When its concentration in the air reaches 10%, it can make people suffocate. When the content of natural gas (methane) in the air reaches 5- 15%, there is a great danger of explosion and gas leakage when it meets a fire source. In daily life, we must pay attention to the safety of gas use.

Gas leakage has the following common reasons:

1, Gas leakage caused by rubber hose problem: Gas hose is a special oil-resistant rubber hose connecting gas pipeline and gas appliance, and gas leakage accidents caused by aging gas hose or mouse bite account for more than 30% of all gas accidents.

(1) Rubber hose is aged and cracked. If the hose exceeds the safe service life, it will age and crack, leading to gas leakage.

⑵ Gas cookers are used for a long time, and both ends of the connecting hose are loosened naturally or artificially, resulting in gas leakage.

(3) Rats biting natural gas hoses will lead to natural gas leakage. Rats are rodents, with a pair of front teeth and well-defined and toothless roots. The front teeth are constantly growing and need to be worn by chewing hard objects.

2, ignition failure, resulting in direct leakage of unburned gas.

3. When cooking or boiling water with a cooker, boiling soup leads to water pouring or wind blowing to extinguish the fire, resulting in gas leakage.

4. Forget to turn off the fire after using the cooker or the valve of the cooker is not closed tightly after turning off the fire, resulting in gas leakage.

5, pipeline corrosion or gas meter, valve, interface damage.

6, relocation, decoration or artificial pull rope or hanging items on the indoor pipeline and other external damage, so that the pipeline interface is loose, resulting in gas leakage from the damaged or loose parts.

7. The gas stove is damaged, resulting in gas leakage.

8. During the use of the gas stove, the gas supply was suddenly interrupted and the gas valve was not closed in time, resulting in gas leakage in the pipeline when the gas supply was resumed.

Preventive measures and emergency measures must be taken for gas leakage, and preventive measures should also be taken when using gas stoves. Choose a safe gas stove to prevent and reduce gas leakage and ensure gas safety.