Fume Hood Exhaust Stack System
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چکیده
منابع مشابه
Performance of a fume-exhaust gun system in CO2 arc welding.
Although the incidence of pneumoconiosis has been decreasing in Japan, welders’ health hazards due to welding fume inhalation are still serious, because effective engineering methods for controlling fumes are technically difficult to implement in many welding shops. In the 6th notification of general prevention of dust hazards issued by the Japanese Ministry of Health, Labor and Welfare (2003–2...
متن کاملLocal exhaust ventilation for the control of welding fumes in the construction industry--a literature review.
Arc welding is a common unit operation in the construction industry, where frequent changes in location and welding position make it more difficult to control fume exposures than in industries where fixed locations are the norm. Welders may be exposed to a variety of toxic airborne contaminants including manganese (Mn) and hexavalent chromium (CrVI). Local exhaust ventilation (LEV) is a well-kn...
متن کاملNumerical simulations to determine the most appropriate welding and ventilation conditions in small enclosed workspace.
In order to improve arc welding work in a small enclosed workspace, numerical simulations were conducted to find the most appropriate welding and ventilation conditions, such as welding currents, hood position and flow rates with no blowhole formation. In the simulations, distributions of airflow vectors and fume concentrations were calculated for two hood opening positions: one faced a welder'...
متن کاملDevelopment of a light sensing self-adjusting hood for welding fumes.
Recently, the incidence of pneumoconiosis due to inhalation of welding fumes has become increasingly remarkable in Japan. Although several engineering methods such as local exhaust ventilation, push-pull ventilation and general (dilution) ventilation have been preferred for controlling airborne contaminants released from welding work, thorough reduction of the welder’s exposure to welding fumes...
متن کاملطراحی و ارزیابی عملکرد سامانۀ تهویۀ مکشی موضعی بر روی مشعل جوشکاری
Background and aims: The welders' health threat due to exposure to welding fume is an important issue, so effective exhaust of fumes are needful for to be assured from the workers safety in exposured to such proccess. In this study, was evaluated prototype operation of local exhaust ventilation on-gun in bench scale. Methods: duct velocity Average was determined by using traverse points meth...
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تاریخ انتشار 2013