2023-06-28 04:47:31
It was a tragic event! After a “fire extinguisher exploded” inside the Ratchawinit Secondary School in Nang Loeng district, Bangkok, during a fire drill. As a result, one male student died and more than 20 were injured late on June 23, 2023. The “Fire Extinguisher”, which caused the explosion, was a red type of “CO2” fire extinguisher, causing people to panic over the past week placing fire extinguishers on roadsides, garbage dump sites, or beside extinguishing stations. fire which Bangkok The Department of Disaster Prevention and Mitigation or the Bangkok Metropolitan Administration has reiterated that there are no “C02” tanks distributed among schools, communities, and do not have to be returned. But if in doubt whether it’s safe or not, you can contact the fire department near the house to help check.
This is so that people can observe or use fire extinguishers safely. “Faculty of Engineering Chulalongkorn University” has suggestions and observation points for choosing to prevent fire extinguishers from exploding 100% by
Professor Pisut Pianmanakul, Lecturer at the Department of Environmental Engineering Faculty of Engineering Chulalongkorn University And the Director of the Carbon Institute for Sustainability (CBiS) revealed that from the fire extinguisher incident that exploded on the student until the death occurred. I want fire extinguisher users not to panic. and have an understanding of the types of fire extinguishers because if using a fire extinguisher to suit the fuel or that place This will greatly reduce the risk of an explosion. Including helping to reduce the impact or dirt caused by fire fighting in another way as well
The first important thing is to choose the right type of fire extinguisher. Must have an understanding of the types of fire extinguishers. Usually, fire extinguishers are categorized according to their use. Or the type of light, consisting of 6 types, including a color bar that shows the user to notice
1.Used for general fire extinguishing
2. Used to extinguish fire caused by oil.
3. Used to extinguish fire caused by gas.
4. Used to extinguish fire caused by metal.
5. Used to extinguish fire caused by electronic appliances.
6. Used to extinguish fire caused by food and fat.
fire extinguisher user Fire extinguishers should be selected that are suitable for the type of fire. Or the fuel inside the building (Type of Fire) / fire extinguishing efficiency (Fire rating), including considering the pressure of each type of fire extinguisher at different heights (Pressure), for example CO2 type fire extinguishers will have a black stripe that is suitable for fuel types such as flammable liquids and high pressure than other types of fire extinguishers, etc. Usually, houses, schools, hospitals often use liquid type fire extinguishers. Foam extinguishers and water extinguishers have a low internal pressure (in the range of 12-15 bar) and are therefore less likely to experience such an explosion.
But from the incident, according to the information, it was found that a CO2 type fire extinguisher was used, which was suitable for dealing with oily fuels. and use with electronic devices, computers, and has advantages Reduce the impact or dirt from fire fighting. In addition, CO2 fire extinguishers have a pressure inside the tank higher than 55 bar (to compress CO2 gas in the liquid phase inside the tank) to be used to demonstrate to students, which may not be accurate. with fuel or the cause of the risk of fire within the school This increases the risk of an explosion due to the relatively high filling pressure inside the tank. In addition, when inspecting and controlling the quality of the equipment used in the demonstration training is another relevant factor. This is not the same as procurement to install fire extinguishers in the office building (Office / Server room) where there will be clear inspection and maintenance procedures.
Lecturer at the Faculty of Engineering, Chulalongkorn University Therefore, 100% of methods are recommended to prevent fire extinguishers from exploding as follows: 1. Cycle maintenance (at least once every 6 months) can reduce the risk of explosion by 50%, especially with a pressurized fire extinguisher. High 2. Use a fire extinguisher that is suitable for the type of fire or fuel and location, reducing the risk of explosion by 25% to reduce the risk of unnecessary use of high pressure cylinders. to the worker Along with maintaining and checking the pressure or the possibility of leakage of the fire extinguishing agent inside the tank. Reduces explosion risk by 25%.
“I don’t want people who use fire extinguishers to be worried until the accident occurs. Because fire extinguishers used in buildings and used in general sales are quite safe according to standards. But from the incident, it may be due to the ignorance of the demonstrator. and use old fire extinguishers that have a long service life causing limitations in accepting pressure want the public especially those who live in high-rise buildings or various establishments Focus on selection, installation, inspection and practice. to reduce the risk and extinguishing fire appropriately and with maximum efficiency according to the principles of building system engineering” Professor Phisut say goodbye
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