“As an LPG engineer – liquefied petroleum gas, I am very sorry to hear about the gas explosion and I want to send the most basic information Full, effective, as well as how to handle emergency situations. ”
Issues to solve when using gas, gas stove
1. Can the gas cylinder cause an explosion?
– The gas can not explode because all cylinders have a safety valve that operates automatically at 26 kg / cm2. As the outside temperature rises (eg fire), the gas pressure in the kettle increases to 26 kg / cm2. The gas pressure in the spring press brake spring of the safety valve leads to the opening of the valve of the safety valve. The gas leaks out to reduce the pressure and temperature in the tank as the gas flows out of the tank with large reservoirs which collect heat to cool the liquid gas in the tank. Of course, the gas released from the fire will burn but only burn in a fire while not causing explosion, destroying the buildings.
2. When buying gas, how can we know the amount of gas in the tank of 12 kg, 13 kg or 48 kg?
– The gas tank after filling the volume of gas will be sealed by resin, membrane shrinkage. However, customers can check the volume of gas in the tank by weighing the total volume of the tank and gas then subtracting the volume. The shell has been inscribed on the wall after the TW
3. How can we know gas? Why not install pressure gauges like other gas cylinders (oxygen bottles, acetylen …)
– This is the problem that customers are very laid out. Gas (exactly LPG) in the vapor is saturated, so the saturated vapor pressure (the same as saturated steam) depends only on the temperature of the LPG, regardless of the LPG content. in jar. If the pressure cooker will show the variation of steam pressure by temperature rather than the amount of LPG in the tank.
This is a special characteristic of liquefied petroleum gas other than liquefied gases. When discharge of compressed air (oxygen, acetylene …) from the pressurized container, the density of the gas molecules gradually decreases, so the pressure in the tank decreases in a certain proportion, so the pressure gauge shows the compressed air left in the tank.
The LPG pressure gauge only makes sense when the liquid gas has been liquefied and the LPG tank becomes a compressed air container as other compressed gases but no liquid gas is consumed in the gas. very short (few minutes). Therefore, the pressure gauge for LPG is not meaningful to indicate the amount of LPG is stored in the tank as well as the forecast gas is running out, so most pressure regulators and gas cylinders do not install pressure gauge.
Normally, when the pot is empty, the flame is red and the kitchen is turned on many times. Customers can also check the questionnaire as the answer to question 2. Or monitor the average monthly consumption can be calculated before the end of gas.
4. Are gas and combustion products toxic?
– Gas is completely non-toxic to the user as well as to the environment. When burned, gas burns even in the event of a fire. Fire products produce only carbon dioxide (CO2) and water vapor – other components are completely non-toxic.
Dangerous things happen only when using gas stove, gas tank in the room. If the gas leak out of gas gas will spread, rise from the bottom up (because it is heavier than air), squeeze the place, push the air out, causing asphyxiation.
Similarly, the CO2 produced after the gas burns in a closed room, if not properly ventured, accumulates, reducing the concentration of oxygen in the air. Therefore strict rules should be followed for users.
5. Why is there a condensation on the outside of the gas tank (sweat phenomenon)? Why use pressure regulator and when the pressure regulator has a small clang.
– When using gas appliances, the process of converting the liquid gas into gas in a bottle is similar to the boiling water, which is different in that the heat-absorbing surface of liquid gas is the entire body of contact with the cylinder. (wet surface). If the appliance consumes large amounts of gas, it will require a faster process of converting the liquid phase into a vapor rather than sufficient supply of liquid gas. The liquid gas will take the heat of the vat to evaporate. The lid is cooled, which condenses the moisture of the outside air.
The pressure reducing function of the gas in the tank (about 6 kg / cm2) is 0.03 kg / cm2 to ensure safe use of the stove as all household gas appliances are designed for Gas pressure is 11 inches of water column (0.03kg / cm2).
Pressure regulators also automatically regulate the amount of gas entering the gas or gas consumption equipment. The amount of gas in the tank does not change the pressure but only affects the speed of evaporation from liquid gas to gas because the wet surface of the gas container is larger than the wet surface of the gas tank. It is easier to absorb outside heat. Automatic opening and closing operation will cause the inner rubber membrane to vibrate, resulting in a small creaking sound.
6. Economic benefits of using gas compared to other sources of energy?
– To provide