This study focused on evaluating the effectiveness of variouswelding processes in reducing volatile gas emissions in workenvironments, a crucial factor for occupational health andsafety. Comparative tests were carried out on three commonwelding processes: SMAW, GMAW and GTAW, with a focuson the concentration of formaldehyde and other volatileorganic compounds (VOCs) in the air. The results revealedhigh statistical significance between treatments, confirmingsubstantial differences in VOC emissions. The Tukey testidentified the GTAW (TIG) process as the most efficient, with aconcentration of total volatiles of 0.0557 mg/m³, well below thethreshold of 0.2 mg/m³, where it is expected that no irritation orsymptoms of discomfort. In contrast, the SMAW and GMAWprocesses showed concentrations that could lead to irritationor discomfort. Choosing the appropriate welding process isrevealed as a c...