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  • It’s inevitable - accidents will happen in the laboratory. Accidents, by definition,

  • are unforeseen. But your knowledge of lab safety will help minimize the likelihood of

  • accidents. And in this lesson, well talk about safety equipment found in the lab. These

  • items may help you save a life - if and when - an accident occurs.

  • When working in a lab for the first time, look around and identify the location of the

  • safety equipment.

  • Every lab must contain a safety shower and eyewash station. Both should be tested weekly

  • to ensure theyre working properly and the water is clean.

  • If a chemical or flame exposure has occurred, yell for help and immediately move to the

  • nearest safety shower. Remove the saturated clothing and thoroughly drench the affected

  • skin under the shower. If your clothes or skin are exposed to flame, then drench your

  • entire body. And have someone call 9-1-1.

  • The eyewash station is used for rinsing your eyes if theyre exposed to hazardous chemicals.

  • Hold your eyes open and thoroughly rinse for at least 10 minutes.

  • The next piece of safety equipment is the fire extinguisher.

  • There are 4 types of fires. Class A fires consist of ordinary combustibles such as wood,

  • cloth, and paper. These fires can be extinguished by water or general purpose extinguishers.

  • Class B fires include organic solvents and flammable liquids, and class C fires involve

  • electrical equipment. Class B and C fires must be smothered with chemical foam extinguishers.

  • Putting water on these fires will only make matters worse. Water will actually cause the

  • fire to spread and you can even electrocute yourself.

  • Class D fires involve combustible metals which aren’t very common in the lab.

  • That’s why most labs contain dry chemical fire extinguishers which are installed close

  • to exits. Dry chemical extinguishers are effective against class A, B, and C fires.

  • If a fire occurs, and it’s too large for you to extinguish, evacuate all personnel

  • immediately and call 911.

  • Don’t attempt to use a fire extinguisher unless you have been trained to do so by certified

  • trainers such as the local fire department.

  • A fire blanket can be used to extinguish small fires on work benches and floors. And it can

  • also be used to help a person whose clothing is on fire. Never wrap a person while theyre

  • standing. This can force flames upward toward their head and neck area. Instead, help the

  • person to the floor, wrap the fire blanket around them and help them roll until the fire

  • is out.

  • Each lab should have a first aid kit that contains bandages and antiseptic for minor

  • injuries.

  • Evacuation routes should be posted near the exits. It’s important that you know multiple

  • evacuation routes in case one is blocked.

  • Another helpful piece of safety equipment is the chemical fume hood. It’s a ventilated,

  • enclosed work area that protects you from toxic vapors.

  • Turn on the exhaust fan. Make sure the hood is venting properly.

  • The opening is covered by a window, called a sash, which can be raised and lowered. For

  • most applications, the sash should be opened to either 8 or 16 inches.

  • Never store chemicals under the hood and always clean and remove materials when youre finished

  • working.

  • Test your safety equipment regularly to make sure each item is ready in case there’s

  • an emergency. In our next lesson, well examine how your behavior in the lab can help

  • keep you and your co-workers safe.

It’s inevitable - accidents will happen in the laboratory. Accidents, by definition,


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B2 中高級

安全設備 / 實驗室安全視頻第二部分 (Safety Equipment / Lab Safety Video Part 2)

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    kuoyumei 發佈於 2021 年 01 月 14 日