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International Journal of Occupational Hygiene، جلد ۱۰، شماره ۴، صفحات ۳۸۲-۳۸۲
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عنوان انگلیسی Evaluation of ventilation performance parameters for an on-gun welding prototype
چکیده انگلیسی مقاله Reported exposures to hazardous fumes and gases from the welding process indicate the importance of using effective ventilation systems to control these emissions. This study, designated to control the welding contaminants, utilized the performance of a prototype on-gun system in bench scale. The study evaluated the system in terms of the ventilation parameters, including exhaust flow rate, capture velocity, and duct and face velocities. The hood operation was tested at 34.06 standard cubic feet per minute (SCFM). The gravimetric analysis based on ISO 10882-1 (part 1) was used to determine the total particle concentration and hood efficiency. According to the results, when the hood face was located at 2 cm from the gas nozzle, the capture velocity at the arc point reached 140 fpm. By increasing the distance to 4-6 cm, the capture velocity decreased to 100 and 60 fpm, respectively. It was concluded that the distance of the hood face from nozzle has a direct effect on capture efficiency. The evaluated hood could reduce the exposure risk of welding fumes with the capture efficiency of 77.73% at a distance of 2 cm from the nozzle.
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نویسندگان مقاله | Rasool Yarahmadi
Occupational Health Research Center, Department of Occupational Health, School of public Health, Iran University of medical sciences, Tehran, Iran


| mitra rashidi
Ms.


| Alireza Alipoor
Assistant Professor of Mechanical Engineering, Sahid Chamran Ahvaz University, Ahvaz, Iran


| Parvin Moridi
Air Pollution Research Core, Pars Plasma Bonyan (knowledge based Co), Tehran, Iran.
نشانی اینترنتی http://ijoh.tums.ac.ir/index.php/ijoh/article/view/382
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