Background: Presented information about the welding process and equipment, focusing on the emission of electromagneticfield (EMF) with levels significant in terms of the labor safety regulations in force in Poland – the ordinances of the Ministerof Family, Labour and Social Policy that came into force on June 27, 2016 and June 29, 2016 – emerged due to harmonizationwith European Union directive 2013/35/EU of 26 June 2013 of the European Parliament and the Council. They presented methodsof determination of the EMF distribution in the welding machine surroundings and analyzed the background knowledge fromthe available literature. Material and Methods: The subject of the analysis included popular high frequency welders widely used in theindustry. Electromagnetic field measurements were performed in the welder operating place (in situ) during machine normaloperations, using measurement methods accordant with labor safety regulations in force in Poland and according to the sameguidelines, the EMF distributions and parameters having been described. Results: They presented various scenarios of particular,real examples of excessive exposure to EMF in the dielectric welder surroundings and showed solutions, ranging from simple andcostless and ending on dedicated electromagnetic shielding systems, which allowed to reduce EMF exposure in some cases ofmore than 80% (protection zone ranges) or eliminate dangerous zone presence. Conclusions: It has shown that in the dielectricwelders surrounding, significant EMF strength levels may be the result of errors or omissions which often occur during development,installation, operation or modification of welding machines. It has allowed to present the measures that may significantlyreduce the exposure to EMF of workers in the welder surroundings. The role of accredited laboratories in helping in such caseswas underlined. Med Pr 2017;68(6):693–703
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