2. Before starting the arc-welding warn the people around you for protecting cover . 3. Never use wet arc-welding equipment or perform arc welding in wet or damp locations. 4. Do not look at the arc! Looking at an arc for an extended period of time without a welding helmet may result in flash burn. 5. While the output from the welder is limited by code to reduce the chances of a fatal electric shock , you can still get an unpleasant jolt , if you are not careful. Consider the following precautions: • Use well insulated electrode holders and cables. • Make sure that the welding cables are dry and free of grease and oil. • Keep welding cables away from power supply cables. • Wear dry hole-free gloves . • Do not touch electrical connections, wires, or other electrically charged machine parts. • Do not weld while your gloves or your clothing are wet. Never change the electrodes with bare hands or wet gloves . • Do not grab the electrode and ground at the same time with your bare hands.
16 6. Always conduct arc welding in well ventilated areas. Avoid breathing welding fumes. 7. Do not arc weld on coated metals (galvanized, lead, or cadmium plated steel) unless the coating is completely removed from the area to be welded and the welding area is well ventilated. 8. Do not arc weld where flying sparks can reach flammable materials. Keep flammable materials at least 35 feet from arc welding operations. 9. Remove combustible items, such as matches or a lighter, from your pockets and leave them in your backpack before beginning to arc weld. Make sure a fire blanket and extinguisher are present in the arc-welding work area. 10. When stick welding, always take the electrode out of the electrode holder before putting the holder on the table so it does not arc to the table. 11. Do not hand a classmate or the TA’s your work until it has been cooled of in one of the water buckets. 12. Do not switch the polarity of the machine while it is under operating load, it can lead to machine damage and can burn the person who moved the switch. 13. Always keep compressed gas cylinders away from arc-welding work areas. Never arc weld on a compressed gas cylinder! 14. Never dip hot electrode holders in water . 15. Avoid having electrode cables wrap around your body when arc welding. 16. When possible, use vises or clamps to secure work pieces while arc welding.
17 IV. COMPRESSED GAS CYLINDER HANDLING SAFETY A gas cylinder or tank is a pressure vessel used to store gases at high pressure. 1. Do not move any compressed gas cylinders unless they have the safety cap on them. If they happen to fall over without the protective cap, the valve could break off turning the tank into a projectile. 2. Always securely strap compressed gas cylinders to the wall or cart, where they will be used.
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- Safety, Oxy-fuel welding and cutting, general shop safety, shop safety rules