Ozone Formed in the welding arc Acute effects include fluid in the lungs. Very low during open arc welding concentrations (for example one part per million) processes including Manual cause headaches and dryness of the eyes. Arc Welding (MMAW), Chronic effects include significant changes in lung Flux Cored Arc Welding function. (FCAW), especially during plasma-arc, Metal Inert Gas (MIG) and Tungsten Inert Gas (TIG) processes. Phosphine Metal coated with rust Irritant to eyes and respiratory system, can inhibitors. Phosphine is formed damage kidneys and other organs. by reaction of the rust inhibitor with welding radiation. Table 4 Source and health effects of organic vapours as a result of welding Organic Source Health effect vapour type Aldehydes Metal coating with binders and Irritant to eyes and respiratory tract pigments. Degreasing solvents (such as formaldehyde) Diisocyanates with polyurethane paint Eye, nose and throat irritation. High possibility of sensitisation, producing asthmatic or other allergic symptoms, even at very low exposures. Phosgene Metal with residual degreasing Severe irritant to eyes, nose and respiratory solvents. Phosgene is formed system. Symptoms may be delayed. by reaction of the solvent and welding radiation.
Ozone Formed in the welding arc during open arc welding processes including Manual Arc Welding (MMAW), Flux Cored Arc Welding (FCAW), especially during plasma-arc, Metal Inert Gas (MIG) and Tungsten Inert Gas (TIG) processes. Acute effects include fluid in the lungs. Very low concentrations (for example one part per million) cause headaches and dryness of the eyes. Chronic effects include significant changes in lung function. Phosphine Metal coated with rust inhibitors. Phosphine is formed by reaction of the rust inhibitor with welding radiation. Irritant to eyes and respiratory system, can damage kidneys and other organs. Table 4 Source and health effects of organic vapours as a result of welding Organic vapour type Source Health effect Aldehydes (such as formaldehyde) Metal coating with binders and pigments. Degreasing solvents Irritant to eyes and respiratory tract Diisocyanates with polyurethane paint Eye, nose and throat irritation. High possibility of sensitisation, producing asthmatic or other allergic symptoms, even at very low exposures. Phosgene Metal with residual degreasing solvents. Phosgene is formed by reaction of the solvent and welding radiation. Severe irritant to eyes, nose and respiratory system. Symptoms may be delayed.
code_of_practice_-_welding_processes.docx