SAFEGUARDING AGAINST METAL FUME FEVER IN WELDING OPERATIONS
Metal fume fever prevention starts with ending exposure to zinc in workshops and facilities where welding applications are present. Metal fume fever, or MFF, is an acute
condition experienced by many welders during their career lifetimes. The primary cause of metal fume fever is overexposure to zinc oxide fume (ZnO). A thin surface layer of zinc is featured on galvanized steel to provide corrosion resistance and vaporizes into zinc-oxide fumes during various welding processes.
The main source of exposure is breathing fumes that are produced from welding, cutting, or brazing on galvanized steel. During metalworking applications, machines generate high speeds which result in fumes, smoke, and other harmful airborne contaminants.
Because galvanized steel is becoming more common in the industry, welders are working with it more frequently. Copper and magnesium may cause similar effects. When overexposed to zinc oxide fumes, a welder will experience a flu-like illness—metal fume fever. Symptoms of metal fume fever typically occur 3-10 hours after heavy exposure.
Metal fume fever is a temporary illness with symptoms ranging from headache and fatigue to chest soreness and gastrointestinal pain, and can even result in convulsions and hallucinations. It is contracted by inhaling zinc-oxide fumes, not by exposure to the mouth or skin—it happens quickly and at times without notice to the welder. Metal fume fever is most likely to occur at the beginning of the workweek and has been dubbed by some as monday morning fever.
The amount of zinc-oxide fumes that welders are exposed to varies and is most common in facilities and workshops without proper ventilation and/ or fume extraction in place.
Because of the symptoms, metal fume fever can be difficult to diagnose and is often suggested by welders who understand that it is a potential risk.
When metal fume fever is acute, emergency medical assistance may not be required because most symptoms go away within 1-2 days, with the exception of welders with pre-existing heart and lung ailments. Long-term exposure to zinc-oxide fumes can result in more severe health effects.
The amount of zinc-oxide fumes that welders are exposed to varies and is most common in facilities and workshops without proper ventilation and/ or fume extraction in place.
Because of the symptoms, metal fume fever can be difficult to diagnose and is often suggested by welders who understand that it is a potential risk.
When metal fume fever is acute, emergency medical assistance may not be required because most symptoms go away within 1-2 days, with the exception of welders with pre-existing heart and lung ailments.
Long-term exposure to zinc-oxide fumes can result in more severe health effects.
PREVENT METAL FUME FEVER WITH FUME XTRACTORS!
Employers are responsible for providing guidelines, manuals, and training to ensure that employees are aware of metal fume fever and how to prevent it.
The most effective way to prevent overexposure to zinc is with welding fume extraction systems - including source capture and local exhaust ventilation. By extracting metal fume at the source, the surrounding air is kept clean and safely breathable and ventilation helps remove fumes from the airstream. Other ways to help prevent metal fume fever include PPE to protect respiratory zones and continued training with knowledge of welding fumes, and present chemicals.
The current OSHA standard for zinc oxide fume is 5 milligrams of zinc oxide fume per cubic meter of air (mg/m3) averaged over an eight–hour work shift. NIOSH recommends that the permissible exposure limit be changed to 5 mg/m3 averaged over a work shift of up to 10 hours per day, 40 hours per week, with a Short–Term Exposure Limit (STEL) of 10 mg/m3 averaged over a 15–minute period.
Fume Xtractors was developed to combat the health hazards that industrial machine operators are faced with on a daily basis. Our welding fume removal solutions range from fume extraction arms to welding booths, depending on the demands of your application.
Fume Xtractors welding fume extractors provide an easily adjustable and convenient way to remove harmful contaminants before they reach the breathing zone of machine operators. Our team works directly with engineers, distributors, and general contractors to provide turn-key prices and customized fume extraction systems to fit their application demands. To learn more about metal fume fever, or to get started on your free quote, get in touch with our specialists.
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