Before we learn how to extinguish fires, we first need to know a little about how they work. The fire triangle to the right shows the three things that.

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Presentation transcript:

Before we learn how to extinguish fires, we first need to know a little about how they work. The fire triangle to the right shows the three things that must be present at the same time in order for a fire to occur. Take any of these away and the fire will be extinguished!

Not all fires are the same. We classify fires based on the type of fuel they burn. If you use a fire extinguisher on the wrong type of fire you can in fact make it worse! Most extinguishers have a label showing which fires they can fight.

The extinguisher in our room is a Dry Chemical Extinguisher used to fight A, B and C fires. These are filled with a fine yellow powder and pressurized with nitrogen. Read the label carefully before using to ensure it can put out the type of fire you are fighting! These extinguishers put out fires by coating the fuel with a fine layer of dust, separating the fuel from the oxygen in the air. They also interrupt the chemical reaction of the fire, so they are extremely effective!

1) Assist any person in immediate danger to safety if it poses no danger to yourself 2) Activate the building fire alarm or call ) Only after you have done these two things should you attempt to fight the fire if : You know what is burning (Remember you could make it worse by say throwing water on an electrical or oil fire). The fire is no bigger than a kitchen garbage can. Bigger fires can spread much faster than you could anticipate. You have an escape route that isn’t blocked. ALWAYS KEEP AN EXIT TO YOUR BACK!!!!

It's easy to remember how to use a fire extinguisher if you can remember the acronym PASS, which stands for: Pull Aim Squeeze Sweep

Pull the pin. This will allow you to discharge the extinguisher.

Aim at the base of the fire. If you aim at the flames (which is frequently the temptation), the extinguishing agent will fly right through and do no good. You want to hit the fuel.

Squeeze the top handle or lever. This depresses a button that releases the pressurized extinguishing agent in the extinguisher.

Sweep from side to side until the fire is completely out. Start using the extinguisher from a safe distance away, then move forward. Once the fire is out, keep an eye on the area in case it re- ignites.

Remember!!!! Never use a water extinguisher to put out any type of fire except type A. Using one on an electrical fire could electrocute you! Using one on a flammable liquid fire (like gas) will be ineffective and could make it worse.

Know where exits are: 2 in front Exits should always be kept clear. Backpacks should stay under desks to prevent tripping and injury if we have to evacuate quickly!

Never stick anything in the outlets- it can remain stuck and cost A LOT of $ to remove. Outlets are off if the valves are perpendicular (at a right angle) to the nozzle. OFF ON

Make sure they are cool before you touch. Most injuries occur because the plate is still hot even after it is turned off.

Don’t complete the circuit! Don’t be a pathway to the ground. Grounding pins in the plug, help ground the wire and protect against dangerous current.

1) Always pour acids into water. If anything splashes out it will most likely be water. Pouring water into acid can create an exothermic reaction that explodes! 2) Always wear goggles when working with chemicals. 3) Never smell a chemical directly. Waft it with you hand to your nose.

Eyewash If a chemical gets into your eyes, don’t notify me first- GO DIRECTLY TO THE EYEWASH! Wash eyes for at least 15 minutes, even if there is no pain or irritation.

Contacts Contacts can pose a greater risk of eye injury when working with chemicals. Some chemicals will literally melt the contact to your eye. It is strongly recommended (but not required) that you wear glasses and not contacts during a chemistry lab.

Fume Hood In the back of the room. Sucks air out to prevent dangerous vapors from getting into the lab space. Anything in the hood should only be touched with explicit instruction!

Safety Shower This you must ask me to use first, unless I’m not around. If you spill dangerous chemicals onto yourself, you will need to remove the clothes and stand under the shower until I say it is ok (probably 15 minutes). Don’t worry everyone will leave the room, and you’ll be given a new set of clothes.