Classification criteria for combustible solids, and what category of fire hazard of combustible soli

According to the level of ignition point, the size of flammability, etc., flammable solids can be divided into two grades:

1) Class 1 flammable solid.

Its ignition point and spontaneous ignition point are low, easy to burn**, fast combustion speed, and high toxicity of combustion products.

2) Secondary flammable solids.

The flammability of such substances is worse than that of first-class flammable solids, the combustion speed is slower, and some combustion products are less toxic.

Flammable solids refer to solids that are easily combustible, easily flammable under the conditions of transportation or may be ** after friction.

Combustible solids are divided into combustible solids (ignition point less than 300 °C) and flammable solids (ignition point greater than 300 °C) according to the ignition point

It can be burned when it reaches the ignition point.

The fire hazard of combustible solids is Class C. 1. Class A: flash point less than 28 degrees Celsius.

of liquids, ** lower limit.

Less than 10% gas. Substances that can decompose on their own at room temperature or oxidize in the air can lead to rapid spontaneous combustion or **. 2. Category B:

Liquids with a flash point of not less than 28 degrees Celsius but less than 60 degrees Celsius. **The lower limit is not less than 10% for gases. 3. Category C:

Liquids with a flash point of not less than 60 degrees Celsius. Combustible solids. <

1. Class A: Cracking liquids with a flash point of less than 28, and gases with a lower limit of less than 10%. Substances that can decompose on their own at room temperature or oxidize in the air can lead to rapid spontaneous combustion or **. It is affected by water or water vapor in the air at room temperature. It can produce flammable gas.

and cause combustion or ** substances, acid, heat, impact, friction, catalysis, and flammable inorganic substances such as organic matter or sulfur.

It is a strong oxidant that can easily cause combustion or **.

Substances that can cause combustion or ** when they are subjected to impact, friction or contact with oxidants and organic matter. Production in a closed plant with an operating temperature greater than or equal to the spontaneous ignition point of the substance itself.

2. Class B: liquids with a flash point of not less than 28 but less than 60. **The lower limit is not less than 10% for gases.

Oxidants that do not belong to class A. It is a chemically flammable hazardous solid and combustible gas that does not belong to Class A. Dust, fibers, and liquid droplets with a flash point greater than or equal to 60 in the floating state that can form a ** mixture with air.

3. Class C: liquids with a flash point of not less than 60. Combustible solids carry positive.

4. Class D: the production of non-combustible substances that are processed and often produce strong radiant heat, sparks or flames at high temperature or in a molten state. Various productions that use gases, liquids, and solids as fuels, or burn gases and liquids for other purposes.

Production of difficult-to-burn substances that are used or processed at room temperature.

5. Class E: the production of non-combustible substances used or processed at room temperature.

Solid combustibles, such as wood, paper, cloth, etc. Combustible liquids such as gasoline, paint, alcohol, etc. Combustible gas, such as: coal gas, natural gas, liquefied petroleum gas, acetylene gas, etc.

Solid combustibles, such as wood, paper, cloth, etc.

Combustible liquids such as gasoline, paint, alcohol, etc.

Combustible gas, such as: coal gas, natural gas, liquefied petroleum gas, acetylene gas, etc.

There are many types of combustibles. According to different chemical structures, combustibles can be divided into two categories: inorganic combustibles and organic combustibles. The inorganic elements in inorganic combustibles are:

potassium, sodium, calcium, magnesium, phosphorus, sulfur, silicon, hydrogen, etc.; Inorganic compounds include: carbon monoxide, ammonia, hydrogen sulfide, phosphine, carbon disulfide, hydrazine, hydrocyanic acid, etc. Organic combustibles can be divided into low molecular weight and high molecular weight, and can be divided into natural and synthetic.

In addition to polyhalogenated hydrocarbons such as carbon tetrachloride, difluorochlorobromomethane (1211) and other non-combustible and can be used as fire extinguishing agents, most of the other organic compounds are combustible. Organic combustibles include: natural gas, liquefied petroleum gas, gasoline, kerosene, diesel, alcohol, soybean oil, coal, wood, cotton, linen, paper and three major synthetic materials (synthetic plastics, synthetic rubber, synthetic fibers), etc.

1. There are only two categories of combustibles, which are divided into inorganic combustibles and organic combustibles. Combustibles are the main suppliers of pyrotechnic energy, so the selection of combustibles in pyrotechnics is very important. When selecting combustibles, if you choose one that is very easy to oxidize, when mixed with an oxidant, the mechanical sensitivity is extremely high, such as red phosphorus.

2. In addition, pyrotechnic powder composed of combustibles with a relatively low melting point has high mechanical sensitivity under the same conditions, such as magnesium, sulfur, gallic acid, realgar, etc. Any substance that can react with oxygen or other oxidants in the air is called combustible. Combustibles are divided into three categories according to their physical state: gaseous combustibles, liquid combustibles and solid combustibles.

Most of the combustible substances are compounds containing carbon and hydrogen, some metals such as magnesium, aluminum, calcium, etc. can also be burned under certain conditions, and many substances such as hydrazine, ozone, etc., can release light and heat through their own decomposition at high temperatures.

It is recommended to eat pasta especially for patients with poor gastrointestinal digestive function and peristalsis function, although rice and pasta are both starchy foods, but the structure is not the same. Soft pasta is easier to digest than rice. The amount of activity at night is relatively small, and eating easy-to-digest food can reduce the burden on the stomach and intestines, so that the stomach and intestines can get a good rest at night.

In addition, if you are a patient with excessive gastric acid secretion, you should also eat more pasta, because in the process of making pasta, baking soda (i.e., sodium bicarbonate) needs to be added, which is an alkaline substance that can neutralize excessive gastric acid. It is not appropriate to eat any pasta at night, and whether the pasta is easy to digest is also related to the processing process. To choose refined pasta, not only is it conducive to digestion and stomach qi, wheat is flat, sweet in taste, pasta can also be used to nourish the heart and calm the nerves, which is beyond the reach of rice.

Analysis: If you have a bad stomach, it is better to eat noodles at night. Noodles are easy to digest and are more easily absorbed.

Noodles also have the function of nourishing stomach qi, and are high in calories and can be filled with enough energy. Rice is not easy to digest, and if you have a bad stomach, it is even less recommended to eat rice at night. After dinner, it is recommended to do proper exercise, such as walking, before exercising you should eat some foods that can accumulate calories for a long time, noodles can provide essential glucose, and can also be more resistant to thirst, so it is more recommended to eat noodles at night.

Analysis: Eating a moderate amount at night will not cause obesity, and eating too much will easily lead to obesity. Rice has a lot of starch, and eating too much of it can easily cause fat accumulation and gain weight.

Rice contains protein, mainly composed of rice protein and amino acids, which are easily absorbed by the human body. So it's not easy to eat more at night. The dietary fiber, minerals, B vitamins, etc. in rice can meet the nutritional needs of the human body, as long as you don't eat too much, you won't gain weight.

Cucumbers and tomatoes can be eaten with fresh vegetables or before meals to increase the fullness of the stomach and reduce the intake of rice. Analysis: Eating fried rice at night can easily lead to obesity.

The main ingredients of fried rice are rice and vegetable oil, as well as some vegetables or eggs. Among them, vegetables and eggs are non-fattening foods, while rice is rich in starch and vegetable oil is rich in fat, which are relatively strong fattening foods. This kind of food is eaten at night, because after eating, it quickly enters the state of sleep, and the digestion and absorption function is not weakened after sleep, but the consumption of sugar and fat will be significantly weakened, which can easily lead to obesity.

There are red phosphorus, diphosphorus trisulfide, lead dihydrogen sulfite, titanium hydride, meltingSulfur, nitronaphthalene, camphor,Celluloidplates, etc.

Flammable solid refers to a solid substance with a low combustion point, which is easy to cause rapid combustion or ** after being exposed to fire, heat, impact, friction or contact with the oxidant.

Phosphorus, also known as red phosphorus.

It is a kind of purple lead quiet red or slightly brown amorphous powder, which is flammable and can be used in the semiconductor industry as a diffusion source, organic synthesis, and match manufacturing. Diclosed phosphorus trisulfide, also known as phosphorus trisulfide, is a yellow or light yellow crystal or powder, locust slag decomposes when wet, soluble in water, alcohol, ether, odorless and tasteless, mainly used as a chemical reagent. Titanium hydride, also known as titanium dihydride, insoluble in water, is a gray-black powder similar to metal, which belongs to one of the intermediate products of smelting titanium, and is widely used in metallurgy and other chemical industries.

Fire houses are divided into six categories according to combustibles:

Fires are classified according to a standardized method according to the type of combustible material and its combustion characteristics. According to the provisions of the national standard "Fire Classification", fires are divided into six categories: A, B, C, D, E, and F

1. Class A fire: refers to a solid material fire. This substance is usually organic in nature and can produce burning embers when burned. Such as wood, hay, coal, cotton, wool, hemp, paper and other fires.

2. Class B fire: refers to the fire of liquid or meltable solid substance. Such as kerosene, diesel, **, methanol.

Ethanol, bitumen, paraffin.

plastic and other fires.

3. Class C fire: refers to gas fire. Such as coal gas, natural gas, methane.

Ethane, propane.

Hydrogen and other fires.

4. Class D fire: refers to metal fire. Such as potassium, sodium, magnesium, titanium, zirconium, lithium, aluminum-magnesium alloy and other fires.

5. Class E fire: refers to a live fire. A fire in which an object burns with electricity.

6. Class F fire: refers to the cooking objects in the cooking utensils (such as animal and vegetable oils.