Evaluation of operational parameters role on the emission of fumes.

Evaluation of operational parameters role on the emission of fumes. Ind Health. 2017 Dec 12;: Authors: Sajedifar J, Kokabi AH, Farhang Dehghan S, Mehri A, Azam K, Golbabaei F Abstract Electric arc welding is a routine operation in the construction of metallic structures, but the fumes generated during the welding process can threaten the health of welders. Fumes are undesirable products of the majority of welding operations and may have various detrimental effects on health. The purpose of this study was to investigate the effect of operational parameters of the shielded metal arc welding (SMAW) process on the emission of fumes. A dust monitor was used to measure the number and mass concentration of fumes generated by SMAW. Measurements were made at the distances of 23cm (hood inlet) and 41cm (welder\'s breathing zone) from the weld point, with different values assigned to three operational parameters, namely current intensity, travel speed, and heat input (HI). Number concentration (NC) decreased with the increase in particle size. The highest mass concentrations (MC) were observed for MC1 (0.35μm-0.5μm) and MC8 (Larger than 6.5μm). For reducing exposures to fumes, welders are recommended to use the lowest voltage and amperage and the highest travel speed to the extent that does not compromise in the quality of welds. For assessment of exposure to airborne particles in industrial workplaces and specially in welding operations, it...
Source: Industrial Health - Category: Occupational Health Tags: Ind Health Source Type: research