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_ l E WELDING AND CUTTING SAFETY PROCEDURES The greatest hazard of welding and burning operations is the possibility of eye injuries. Ultra-violet radiation is generated during these operations. After exposure to excessive ultra-violet radiation, eyes may develop sharp pains and/or become red and irritated. Without proper protection,it is possible to damage eyes permanently. The following are recommended shades of lenses for various welding and burning operations: OPERATION SHADE NUMBER Soldering 2 Torch Brazing 3 or 4 Light Cutting up to one inch 3 or 4 Medium Cutting,one to six inches 4 or 5 Heavy Cutting,six inches and over 5 or 6 Gas Welding(light)up to 1/8 inch 4 or 5 Gas Welding(mediuin)up to 1/8 to 1/2 inch 5 or 6 Gas Welding(heavy) 1/2 inch and over 6 or 8 Shielded Metal-Arc Welding, 1/16 to 5/32 inch electrodes 10 Inert-Gas Metal-Arc Welding(non-ferrous) 1/16 to 5/32 inch 11 electrodes Inert-Gas Metal-Arc Welding(ferrous)1/16 to 5/32 inch electrodes 12 Shielded Metal-Arc Welding 3/16 to 1/4 inch electrodes 12 Shielded Metal-Arc Welding 5/16 to 3/8 electrodes 14 Carbon-Arc Welding 14 It must be remembered that some plated and/or painted metals can give off harmful filmes or vapors when subjected to the high temperatures of welding or burning. These filmes or vapors could cause a health problem if breathed for too long. Welding and burning should be performed in a well-ventilated area or if working outside, position yourself"up-wind" from the point of operation. Respiratory Protection may be required - ask your Supervisor if you have any questions. When chipping slag,be sure to wear eye protection! In all welding and burning operations be sure the necessary fire protection and measures are taken. Do not store oxygen and acetylene bottles in the same area and protect them fro€n physical damage. Specialists in welding and cutting must not only protect themselves from injury but must also assume a certain responsibility for their helper, their co-worker in other trades,and in some instances, the public. Accident records indicate that others near arc welding operations are injured more often than the operator.