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Ag Metals 1.  Describe the type of protection that should be worn for welding  Describe the proper methods of handling, storing and setting up cylinders.

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Presentation on theme: "Ag Metals 1.  Describe the type of protection that should be worn for welding  Describe the proper methods of handling, storing and setting up cylinders."— Presentation transcript:

1 Ag Metals 1

2  Describe the type of protection that should be worn for welding  Describe the proper methods of handling, storing and setting up cylinders  Discuss the proper way to ventilate a welding area  Explain how to avoid electrical shock  Describe how to avoid possible health hazards for welding  Explain how to prevent fires in welding

3  Start Safe, Stay Safe!  Safety is YOUR RESPONSABILITY  There is no substitute for caution and common sense!  A safe job is no accident; it takes work to keep the job safe.  Welding has a number of potential hazards and they don’t have to result in injury.  Learning to work safely with hazards is just as important as learning to be a skilled welder.




7  Most common injury  Causes  Ultraviolet light  Contact  3 classes of burns  1 st Degree  2 nd Degree  3 rd Degree

8  Surface of the skin is  Reddish in color  Tender  Painful  No broken skin  Treat by  Immediately putting the burned area under cold water (not iced) or apply a cold compress until the pain decreases  Then cover the area with a sterile bandage or clean cloth  DO NOT APPLY butter, any type of grease or other home remedies.


10  Skin surface is severly damaged  Blisters  Possible broken skin  Treatment  Put under cold water (not ice) or apply a cold compress until pain decreases  GENTLY pat the area dry with a clean towel and cover the area with a sterile bandage or clean cloth to prevent infection  Seek medical attention  If burns occur in or around the mouth or nose breathing problems may occur  DO NOT apply  Home remedies  Ointments  Sprays  Antiseptics  In Emergency situations  Any cold liquid you drink (tea, water, soda pop, etc) can be poured on the burn to reduce the skin temperture as quickly as possible.


12  Surface of skin and possible the tissue below appears white or charred  Initial little pain  Treatment  DO NOT remove clothes that are stuck to the burn  Do not put ice water or ice on the burn—this can intensify the shock reaction  Do not apply ointments, sprays, antiseptics or home remedies  If the burn is on or around the face, neck or mouth  Ensure the victim is breathing  Place a cold cloth or cool (not iced) water on the burns (this is for feet as well)  Cover the areas with thick, sterile, nonfluffy dressing  Call an ambulance immediately


14  3 types of light  Ultraviolet  Infrared  Visible  Light that causes burns  Ultraviolet  Infrared  Arc welding produces all 3 types of light  Gas welding produced ultraviolet and infrared  Reflected light from the welding process is just as dangerous as the direct light

15  Paint welding areas flat black  Use welding curtins to absord welding light  NOTE:  USE WELDING CURTAINS AT ALL TIMES TO PROTECT OTHERS WHILE WORKING IN THE SHOP!!!!

16  Most dangerous  Can cause 1 st and 2 nd degree burns to the eyes or exposed skin  May be so intense that a welders eyes can receive FLASH BURN in seconds and skin can be burned in minutes  Ultraviolet light can pass through thin, lightly colored, damaged or poorly maintained welding helmets

17  Always wear a welding mask that is in good condition  Check for cracks, loose lenses  Wear a shop coat  Wear long pants  NO SHORTS  Wear well fitting, close toed shoes  Leather is best.  NO FLIP FLOPS or open toed shoes of any kind!  Wear leather welding gloves

18  Light wave that gives off heat  Easily felt  Can cause burns but is easily avoidable

19  Light we see  Produced in varying quantities and colors during welding  Too much can cause temporary night blindness  Too little can cause eye strain  Generally not hazardous


21  Eyes must be protected at ALL TIMES  Can be done with  Safety glasses  Goggles  Full Face Shield  Flash Glasses ▪ Flash glasses are special lightly, tinted safety glasses that provide both protection from flying debris and reflected light

22  Excessive exposure to arc light is not noticed  Welding light damage is like a sunburn, that is felt the next day—after the damage is done

23  2 types  Burns to the Retina  Not painful  May cause loss of eye sight  Burns to the white  Very painful  May cause eye infections  Feels as though there is something in your eye, or like there is sand in your eyes

24  Wear safety glasses  Use a quality helmet with the correct lens shade  Check helmets daily for cracks and ultraviolet light leaks  Utilize portable welding curtains

25  Several forms  Ear muffs  Ear plugs


27  Area needs to be well ventilated  Natural ventilation is best  Forced ventilation is required in small shops or areas where more than one person is working  Rules for our shop:  Open the overhead door  Turn on the overhead fan in the welding booths ▪ If you are using the Plasma-CAM turn on the vent for it as well  Forced ventilation is always required when welding on metals that contain the following  Zinc  Lead  Beryllium  Cadium  Mercury  Copper  Austenetic  Maganese  Or any material that gives off dangerous fumes


29  Electric shock can cause injuries or death  Most welding and cutting operations involve electricity  Most is powered by alternating current (AC) sources ranging from 115-460 Volts  Fatalaties however can occur with equipment operating at less than 80 volts.

30  Most electrical shock does not happen by coming in contact with electrode holders  However, it is accidental contact with bare or poorly insulated conductors

31  Lowered in the presence of mouisture or water  This includes presperation

32  Workpieces being welded and the frame or chassis of all electrically powered machines must be grounded

33  Must be tight  Terminals for leads and cables must be shielded from contact by persons or metal

34  Must be used within their current carrying capacity and duty cycle capabilities  If not they will overheat and breakdown rapidly  Connectors for lengthening leads must be insulated  Check periodically for fraying

35  Do not allow the metal parts of electrodes or electrode holders to touch your skin or wet coverings on the body  Wear dry gloves in good condition  Rubber soled shoes are also a good idea  When working in cramped kneeling, sitting or lying positions take care to protect yourself from accidental contact with bare conducting surfaces.  Insulated mats or dry wooden boards are desirable protection from Earth.

36  Turn off all circuits  If working on a welder, leads, electrode holder, torches, wire feeder, gun or other parts turn off and tag out the main power supply until you are finished working  Wear dry gloves when changing coated electrodes


38  Use warm water to loosen cylinders that are frozen to the ground  Mark and report to the supplier any cylinder that leaks, has a bad valve, or gas damaged threads  If the cylinder has a leak that can’t be stopped by closing the valve, move it to an open area, post a warning sign and allow the pressure to be released slowly

39  Cylinders that have been lying on their side must stand upright for 4 or more hours before use  Acetylene is absorbed in acetone and the acetone is absorbed in a filler. This filler does not allow the liquid to settle back from the valve very quickly  If the cylinder has been in a horizontal position, using it too soon after placing it in a vertical position will draw the acetone out.  Acetone lowers flame temperture and can damage regulator and torch valve settings.

40  Store oxygen and gas cylinders seperatly  WHY??  Storage areas must by 20 ft or by a wall 15 ft high with at least a ½ hour burn rating  Empty cylinders should be stored seperately from full cylinders  Must be stored vertically  Must have protective caps screwed on firmly

41  Must be secured with chain or some other device so that they cannon be knocked over accidently

42  Locate away from halls, stairwells and exits  Locate away from heat, radiators, furnaces and welding areas  Location should be secure to prevent unauthorized people from tampering with the cylinders  Warning signs should be posted  Ex: “Danger-No Smoking, Matches or Open Light”

43  Must be in place when cylinders are not in use  Prevents the cylinder valve from being broken off if the cylinder is knocked over  Never lift the cylinder by the cap or valve  Caps must be in place when the cylinders are moved


45  Fire is a constant hazzard  Possibility can not be removed but can be minimized  Highly combustible materials should not be in the welding area  When that is not possible a fire watch is needed

46  We should all be on fire watch and know what to do in the case of a fire.  Review the fire drill handout provided.

47  4 classes  A  B  C  D

48 SHOP Sink Tool Room Overhead Door Welding Hood FE Exit ExItExIt

49  Used for combustible solids such as paper, wood, and cloth. A

50  Used for combustible liquids such as oil, gas, and paint thinner. B

51  Used for electrical fires. For example, fires involving fuse boxes, motors and welding machines. C

52  Used on fires involving combustible metals such as zinc, magnesium and titanium. D

53  Works by breaking the fire triangle  Most both cool the fire and remove the oxygen  See handout on how to use the fire extinguisher correctly.

54  Safety starts with YOU!!  PPE  3 Degrees of burns  Burns caused by light  Eye and Ear Protection  Gas Cylinder Safety  Fire Protection  Using a Fire Extinguisher

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