★ Use a non-sparking tool. Do not hit the petrol can with iron tools, especially empty oil drums filled with petrol. Because there is no obvious liquid gasoline in the barrel, the mixture of gasoline and air is extremely difficult to discharge, and it is often within the limits of the explosion. When an open flame occurs, it can cause an explosion. Therefore, it is strictly forbidden to use iron tools in the petrol warehouse, and to prevent the oil barrels from colliding with each other, and not to wear shoes with iron nails to work in the petrol warehouse, so as to avoid the fire caused by the irons colliding with each other.
★ When filling gasoline, the exhaust pipe of the adjacent car should be put on the fireproof cap before it can be started. At the same time, it is strictly forbidden to repair the vehicle near the storage area.
★ Use gasoline tanks and storage tanks to install gasoline. Fireworks and smoking are strictly prohibited nearby. All kinds of fires such as lighters, matches, etc. must be prohibited from being brought into the oil depot, gas station and garage. Explosion-proof lamps and explosion-proof switches should be used in oil depots and garages. It is forbidden to use open flame or oil lamps. Do not put gasoline with flammable or explosive materials such as cotton, matches, detonators, explosives, and oxygen.
★ Do not discard or put oily rags, cotton yarn ends, oil gloves, etc. in the oil depot, garage or workshop to avoid spontaneous combustion. Because these cotton yarn heads with oil (especially lubricating oil) will oxidize at a certain temperature, heat will be released during oxidation, so that the temperature of the oil yarn yarn head will increase and the oxidation speed will increase. This continually undergoes a chain reaction of oxidation-temperature-oxidation, which causes the temperature of the oil yarn yarn to rise to its self-ignition point, causing a fire. Therefore, oil rags, oil-cotton yarn ends, oil gloves, etc. in the oil depot, garage should be concentrated in the iron box with the cover, and cleaned and recycled in time.
★ Pay attention to keep the warehouse, oil depot, workshop and other operating places well ventilated to prevent oil and gas accumulation.
★ Use a dry powder, foam fire extinguisher and asbestos blanket to extinguish the fire.
★ Pay attention to static electricity. During the process of transportation or use of gasoline, the friction between the oil molecules and between the oil and other substances will generate static electricity. When the friction voltage is high to a certain extent, a spark discharge will occur. In the case of a combustible mixture, a fire accident will occur.
( Jinhai Qiang , Sinopec Guangxi Yulin Petroleum Branch )
Gate valve is a relatively common general-purpose valve, the use of a wide range of applications, mainly in water conservancy, metallurgy and other industries, its extensive use of performance has been recognized by the market.
Gate valve structure: gate valve is the use of the gate and seat to control the opening and closing of the valve. Gate valve mainly has a valve body, valve seat, gate, valve stem, valve cover, stuffing box, packing gland, stem nut, hand wheel and other components. Depending on the change of the relative position between the gate and the valve seat, the channel size can be changed and the channel can be cut off. In order to make the gate valve close tightly, the mating surface of the gate plate and the valve seat are ground.
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