Safety Tip: Fireproof and explosion-proof knowledge of gasoline

Gasoline is a colorless or light yellow, volatile liquid with an auto-ignition temperature ranging from 250 to 530°C and an explosive limit between 0.76% and 6.9%. Being highly flammable, it can ignite even when exposed to the smallest spark and burns rapidly over a wide temperature range. Therefore, strict fire safety measures must be followed when handling and using gasoline. First, always use non-sparking tools when working with gasoline. Avoid striking fuel cans or empty drums with metal tools, especially those that may still contain residual gasoline vapors. These vapors can mix with air and create an explosive atmosphere. If an open flame is present, this could lead to a dangerous explosion. Hence, it is strictly prohibited to use iron tools in petrol storage areas. Also, prevent oil barrels from colliding and avoid wearing shoes with metal nails in these zones to prevent sparks from metal-to-metal contact. When refueling vehicles, make sure the exhaust pipe of adjacent vehicles is covered with a fireproof cap before starting the engine. Additionally, avoid repairing vehicles near storage areas to minimize fire risks. In gasoline storage and handling areas, the use of fireworks, smoking, and any ignition sources such as lighters or matches is strictly forbidden. Only explosion-proof lighting and switches should be used in gas stations, oil depots, and garages. Open flames and oil lamps are not allowed. Do not store gasoline alongside flammable or explosive materials like cotton, matches, detonators, explosives, or oxygen. Do not leave oily rags, cotton waste, or oil gloves in the oil depot, garage, or workshop, as they can cause spontaneous combustion. Oily materials, especially those soaked in lubricating oil, can undergo oxidation at certain temperatures, releasing heat and increasing the temperature further. This creates a chain reaction that can eventually reach the auto-ignition point and cause a fire. Therefore, all oily waste should be stored in covered metal containers and disposed of regularly. Ensure proper ventilation in warehouses, oil depots, and workshops to prevent the accumulation of flammable vapors. In case of a fire, use dry powder or foam extinguishers along with asbestos blankets for effective suppression. Also, be cautious of static electricity during the transportation or use of gasoline. Friction between oil molecules and other materials can generate static charges. When the voltage becomes high enough, it can result in a spark discharge, which may ignite a combustible mixture and cause a fire. Always take precautions to ground equipment and avoid conditions that promote static buildup. (Jinhai Qiang, Sinopec Guangxi Yulin Petroleum Branch)

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