![]() ![]() As most studies took place on the shop floor with multiple processes being carried out, and welders possibly carrying out many tasks, it is unclear what welding process fumes they were exposed to. Studies have shown that a wide range of exposures are possible and are affected by process and consumables as well as control measures in the workplace.OELs are being reduced globally, and industry requires more information and guidance to ensure that these limits are complied with.Welders are being exposed to hexavalent chromium, which is classified as a carcinogen, from welding stainless steels and other alloys containing chromium.This report collates relevant information on workplace exposure and its measurement, occupational exposure limits (OELs), control measures, and research needs. ![]() There are therefore concerns in industry about meeting lower limits, and a better understanding is required of how Cr (VI) is produced during welding and what control measures may be required to satisfy new legislation. More stringent limits are already in place in some countries, although in others such reduced limits do not apply or there are no limits in place. Consequently, the European Commission has proposed new limits which will become law. The limit values for exposure have been reviewed and lower limits have been proposed. In arc welding and cutting it is produced by the conversion of trivalent chromium to Cr (VI) in the arc. Welding fume has been classified as a carcinogen with hexavalent chromium (Cr VI) of particular concern. TWI Industrial Member Report 1116-2019 In-bore multi-positional laser welding stainless steel, nickel alloy 718 and Ti-6Al-4V.National Structural Integrity Research Centre.Structural Integrity Research Foundation. ![]()
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