Safety Talk Peiyu Tu 涂霈雨 First Year Graduate Student 11/09/2015

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Presentation transcript:

Safety Talk Peiyu Tu 涂霈雨 First Year Graduate Student 11/09/2015 Group Meeting Safety Talk Peiyu Tu 涂霈雨 First Year Graduate Student 11/09/2015

Heat Guns A heat gun is constructed with a motor-driven fan that draws in air and passes it over a heating coil that easily becomes red-hot. Heat guns are frequently used in research labs to dry glassware, heat the upper parts of a distillation apparatus during distillation of high-boiling point materials, and to develop thin-layer chromatography (TLC) plates. Other heat gun applications for removing or softening materials also exist in the lab setting.

Heat Gun Hazards: The heating element in a heat gun typically becomes extremely hot during use; however, the lack of a visible flame can create a false sense of security or false impression of safety and while the danger zone is invisible, it is very active. The combination of sparks and forced ventilation over a glowing filament may lead to fire and/or explosion. Heat guns operate at lower air speeds and produce temperature as high as 650℃, hot enough to melt some types of glass. .

Keep the following in mind when using a heat gun: Wear appropriate personal protective equipment (PPE) when using a heat gun. A flame retardant lab coat and safety glasses should be considered the minimal requirement. Do not use a heat gun near combustible or flammable materials including open containers of flammable liquids, flammable vapors or hoods used to control flammable vapors/atmospheres.

Keep the following in mind when using a heat gun: Be aware of the direction of the heat. Never direct the air flow towards one’s body. Always switch the heat gun off before putting it down on any surface. Always maintain a minimum of one centimeter of clearance between outlet nozzle and work surface.

Keep the following in mind when using a heat gun: Never touch the hot metal nozzle with clothing or skin. Do not look down the nozzle while the gun is turned on. Do not insert anything down the nozzle of the gun. Allow the tool to cool before storing it. HOT

Keep the following in mind when using a heat gun: Do not use an extension cord to power a heat gun because a high current draw can result in overheating and pose risk of fire or electrocution. Unplug the heat gun when not in use, especially if the lab is unoccupied. Never hold a sample without forceps while using a heat gun or you will risk direct exposure of the heat to your hand.

References and Sources http://www.ehs.wisc.edu/chem/HeatGunUse.pdf http://www.udel.edu/ehs/research/chemical/heat-gun.html https://ehs.princeton.edu/node/382 http://safety.uchicago.edu/files/Heat%20Gun%20Safety.pdf Laboratory Safety for Chemistry Students by Hill and Finster, Wiley, 2010.

Thank you!