1 What is LPG? Liquefied petroleum gas is a gas, usually refers to gas at room temperature and atmospheric pressure condition was, but a little pressure on the kind of easily liquefied petroleum gas.

2, what is the saturation vapor pressure of liquefied petroleum gas? Temperature on the saturation vapor pressure of liquefied petroleum gas impact?

Saturated vapor pressure of LPG, is at a certain temperature, liquefied petroleum gas in a sealed container to gas – liquid two-phase equilibrium state of the steam pressure. Saturation vapor pressure of liquefied petroleum gas is changing with temperature and the temperature increases, vapor pressure also increases, in addition to the vapor pressure of LPG and related components, different components have different vapor pressure. Temperature increase of about every 1 , vapor pressure by about 0.02? 0.03MPa. If the saturated vapor pressure of pure propane at 10 was about 0.47MPa, increased at 20 for the 0.83Mpa, at 50 , the increase is 1.8Mpa.

3, liquefied gas and compressed gas storage and transportation should pay attention to safety matters?

(1) storage should be cool Ventilation Prevent sunlight exposure, heat is strictly prohibited. In transit to care, and not crash. Cylinders at the same time should wear helmets.

(2) the nature of conflict between the cylinder contents of cylinders should be stored separately. For example, the hydrogen cylinder and liquid chlorine; hydrogen bottle and oxygen cylinders; liquid chlorine and ammonia cylinders protruding up with inventory.

(3) Storage of Steel Valve Doors should be tightened, not leak.

4, flammable and explosive characteristics of liquefied petroleum gas mainly in what areas?

(1) LPG low boiling point, easily vaporized at room temperature and atmospheric pressure, 1m3 250m3 of liquid can be vaporized gas.

(2) liquefied petroleum gas is heavier than air, can float on the ground or in low-lying depositional, and easy to spread.

(3) liquefied petroleum gas explosion limit is low, when the liquefied petroleum gas in air concentration of 1.5%, can form explosive gas.

(4) LPG ignition energy is small (less than 0.4mJ), as long as there is an insignificant Mars could ignite detonate.

(5) the resistance of LPG high speed when ejected from the container to produce more than a few kV electrostatic voltage enough to cause ignition of its spark an explosion.

(6) liquefied petroleum gas containing sulfur compounds, to produce iron sulfide corrosion powder container, the event will heat the air Spontaneous Combustion .

5, liquefied petroleum gas with which dangerous?

Are easy expansion for liquefied petroleum gas, easily vaporized, easy to produce static properties, is a combustible explosion risk, but also with corrosion, the role of anesthetic risk.

6, liquefied petroleum gas, burn and explode a few basic conditions which must have?

LPG combustion and explosion took place must have three conditions: First, there must be a certain amount of liquefied petroleum gas; Second, there must be sufficient air; thirdly, we need to reach the fire ignition source or the temperature. These three conditions must be met, and can interact. That is, only when the liquefied petroleum gas in air concentration of 1.5? 9.5% in this range, the case of fire or to fire temperature, fire or explosion can occur.

7, what kind of fire can ignite detonate LPG?

Liquefied petroleum gas is a combustible gas, the ignition energy of smaller, insignificant fires, such as Commelina lit, red-hot wire, electrical switch outgoing Mars, static sparks, friction of Mars, Car Exhaust emission of Mars can be detonated liquefied petroleum gas ignited.

8, liquefied petroleum gas containers with or without corrosion? What harm?

Corrosive liquefied petroleum gas containers. As the liquefied petroleum gas containing a certain amount of sulfide, sulfide can with the vessel wall surface chemical reaction of iron atoms to produce ferrous sulfide, attached to the inner surface of the container, so there is corrosion on the container.

Its corrosion can continue to make the container wall thinning, reducing the compressive strength of the container, leading to vessel formation throughout the defect caused by an explosion; the same time generated iron sulfide powder, will be deposited in the bottom of the container. This powder, such as with the residue poured out, or emptying the liquid into the air a large number of containers, with air oxygen oxidation, heat and ignite.

9, Why LPG is easy to produce static electricity? What harm?

Because LPG is a mixture of heavy hydrocarbons and small amounts of sulfur and other impurities, the resistivity is high, so when the liquefied petroleum gas ejected from the container when the high-speed, nozzle with the container, nozzle, rupture violently with air friction, resulting in more than a few kV electrostatic voltage. It is measured when the static voltage greater than 350V, its sparks can cause burning and explosive liquefied petroleum gas.

10, why the heated liquid LPG trade expansion? What harm?

As liquefied petroleum gas under normal temperature and pressure conditions, it is at low temperature or high pressure compressed liquefied under the conditions of the liquid, stored in pressure vessels with thermal expansion and contraction of the nature, easy to expand, its coefficient of thermal expansion of a great, about equal to the water 10? 16 times. Stored in cylinders of liquefied petroleum gas, the temperature of each rise 1 , liquid volume will expand by about 0.3? 0.4%. As the expansion of liquefied petroleum gas heat easily, so cylinders such as contact with heat, or excessive filling, cylinder explosion occurred on the highly Accident .

11, LPG-induced cause of the fire have?

Burning liquefied petroleum gas is a highly combustible gas explosion in the use of the main reasons for accidents caused by liquefied petroleum gas leaks and fire caused by burning explosive encounter. Common reasons are as follows: (1) the cylinder and pipe corrosion or broken connections caused by liquefied petroleum gas pipe leak aging; (2) kitchen equipment failure or breakage, leakage caused by accidents; (3) filling the excess within the cylinder liquefied petroleum gas, in Environment Temperature cases, dramatic expansion of liquefied gas bottle, resulting in broken bottle; (4) with liquefied petroleum gas cylinders close to heat source, so that the rapid gasification of liquefied petroleum gas cylinder inside the pressure is even greater, up to more than cylinder to allow pressure from the explosion; (5) cylinder explosion caused by fire due to the impact; (6) angle valve, pressure reducer, oven switch, adjustable air baffle failure and leaking gas caused the accident; (7) pour any liquid gas bottles , static discharge or volatile oil and gas event of a fire while the fire; (8) without authorization processing residue or filling gas cylinders, causing combustion explosion.

12, why the liquefied gas smell?

Liquefied gas itself is odorless

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