The cold weather in autumn and winter is the peak of using gas for fire and electricity. Recently, the temperature in Beijing has continued to decrease, and Beijing Fire has issued a safety warning for gas fires.
(1) What is gas? Gas explosion hazard?
Gas is a general term for gaseous fuels that burn and release heat for use by urban residents and industrial companies. There are many types of gas, mainly natural gas, artificial gas, liquefied petroleum gas and biogas. According to the source of gas, gas can usually be divided into natural gas, artificial gas, liquefied petroleum gas and biomass gas.
When the proportion of gas in the air reaches a certain value, it is easy to cause an explosion. When the gas concentration value reaches a certain level, it will automatically alarm. The gas explosion is due to the concentration of gas (including natural gas, coal gas, and liquefied gas) exceeding a certain value.
Gas explosion accidents have strong impact, great power and great destructive explosion. The air in the gas explosion center suddenly decreases. At the same time, with the strong suction force of the shock wave in the opposite direction, “one push and one pull†increases the damage degree, causing serious damage to the building, heavy casualties and more complicated fire.
(2) How to prevent gas leakage and explosion accidents
(1) It is strictly forbidden to store liquefied petroleum gas cylinders in the living room, office and dense public places of the residents. It is strictly forbidden to arrange liquefied gas cylinders in the same room as other fire sources.
(2) Households should use liquefied petroleum gas and natural gas, and oil-resistant rubber hoses should be used for connection with gas cookers. The length should be controlled between 1.2 m and 2 m. When the temperature exceeds 2 m, the pipe connection should be adopted.
(3) A flammable gas concentration alarm device shall be installed in the use of liquefied petroleum gas or natural gas in kitchens.
(4) Liquefied petroleum gas shall not be located in the basement, semi-basement or poorly ventilated place.
(5) If the total weight of the cylinder exceeds 100 kg, a separate cylinder room shall be provided.
(6) The fire resistance level of the gas cylinder building shall not be lower than the second grade, and the height shall not be less than 2.2 meters. The floor materials shall be doors, windows and openings that do not have sparking materials and must not be connected to the kitchen. A ventilation vent should be provided with a ventilation area of ​​not less than 300 square centimeters per square meter.
(7) Explosion-proof electrical equipment should be used between cylinders. The switch should be installed outdoors and should be equipped with dry powder fire extinguishers.
(8) The gas pipeline should be clearly set, and the position should be away from the heat source. The horizontal clearance between the front of the stove and the gas cooker should not be less than 0.5 m, and it is strictly prohibited to be laid directly above the cooker.
(3) How to deal with gas leaks once they are discovered?
In order to arouse people's awareness, civil gas is generally added with a gas with irritating odor, smelling odor or hearing gas leak alarm, first, immediately turn off the gas switch; second, open the window ventilation; third, pay attention to not switch the power supply; It is reported to the property or gas supply unit for inspection and maintenance.
How to deal with a gas explosion accident? In the event of a gas explosion, it is usually accompanied by secondary hazards such as burning and building fires. This is to do: First, restrain the panic, use the simple fire extinguisher equipment on site, control and fight the fire, and soak the bedding at home. Second, it is necessary to quickly close the valve and alarm at the same time; third, in public places, the on-site staff should evacuate the trapped people in an orderly manner; fourth, in the case of the fire out of control, do not greedy the property, quickly escape, avoid secondary disaster.
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