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Evaluation of Operational Parameters Role on the Emission of Fumes Publisher Pubmed



Sajedifar J1, 2 ; Kokabi AH3 ; Dehghan SF4 ; Mehri A5 ; Azam K6 ; Golbabaei F7
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Authors Affiliations
  1. 1. Department of Occupational Health Engineering, School of Public Health, Neyshabur University of Medical Sciences, Iran
  2. 2. Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Iran
  3. 3. Department of Materials Science and Engineering, Sharif University of Technology, Iran
  4. 4. Department of Occupational Health, School of Public Health, Shahid Beheshti University of Medical Sciences, Iran
  5. 5. Department of Occupational Health Engineering, School of Public Health, Iranshahr University of Medical Sciences, Iran
  6. 6. School of Public Health, Tehran University of Medical Sciences, Iran
  7. 7. Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Iran

Source: Industrial Health Published:2018


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 23 cm hood inlet and 41 cm 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 0.35-0.5 μm and MC8 Larger than 6.5 μm. 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 is thought that taking, solely, mass concentration in to consideration and lack of attention to number concentration would not be able to reflect accurate assessment of the adverse effects of particles on the body organs. © 2018 National Institute of Occupational Safety and Health.
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Farideh Golbabaei (1)
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