Assessment and prevention of the propagation of carbon monoxide over a working area at arc welding

Authors

DOI:

https://doi.org/10.15587/1729-4061.2019.170510

Keywords:

arc welding, carbon monoxide, harmful emissions, workspace, gas poisoning

Abstract

This paper reports a study of air environment at industrial premises where welding processes take place, with special attention paid to the formation of carbon monoxide (oxide) (CO) in the working environment in the process of manual arc welding. We have given the classification of basic harmful substances generated during welding and related processes in terms of the character of negative influence on the body of a welder. A mathematical model of the dynamics of change in the concentration of carbon monoxide in the air of a working area has been constructed, based on the amount of a harmful substance (m) in the air at premises at a time point, the intensity of its release into air, and the air exchange rate. A given mathematical model includes the propagation of carbon monoxide in the air, considering the air exchange between the overall volume of a premise and the local volumes of working zones.

There are not enough studies into the formation of carbon monoxide during welding processes, which is why examining this process is a priority.

Out experimental study has confirmed that the concentration of carbon monoxide outside the local volumes of local ventilation devices, that is in the air of working zones, remains constant (to 0.01 mg/m3) and does not exceed MPC (20 mg/m3). A failure or the absence of general ventilation leads to a rapid increase in the concentration of carbon monoxide (CO) in line with an exponential dependence (from 150 to 200 mg/m3 over 0.5‒0.6 hours) within a small closed workspace (1 m3), and can quickly spread throughout the entire premise.

However, a failure or the absence of general ventilation leads to a rapid increase in the concentration of carbon monoxide (CO) in line with an exponential dependence. This indicates that general ventilation is important, but it does not warrant safety for welders and other workers from gas poisoning. Therefore, the use of local ventilation must be ensured, as well as respiratory protection for all present when conducting welding processes. The derived mathematical models make it possible to assess risks during welders’ operations, to take into consideration CO emissions when calculating ventilation systems in working areas, to adjust the system that manages risks and labor safety.

Author Biographies

Viacheslav Berezutskyi, National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002

Doctor of Technical Sciences, Professor, Head of Department

Department of Labor and Environment Protection

 

Inna Hondak, Kharkiv National University of Radio Electronics Nauky avе., 14, Kharkіv, Ukraine, 61166

Senior Lecturer

Department of Occupational Safety

Nataliia Berezutska, Kharkiv National University of Radio Electronics Nauky avе., 14, Kharkіv, Ukraine, 61166

PhD, Associate Professor

Department of Occupational Safety

Vitaly Dmitrik, National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002

Doctor of Technical Sciences, Professor, Head of Department

Department of Welding

Veronika Gorbenko, National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD

Department of Labor and Environment Protection

Viktoriia Makarenko, National Technical University "Kharkiv Polytechnic Institute" Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD, Associate Professor

Department of Labor and Environment Protection

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Published

2019-06-17

How to Cite

Berezutskyi, V., Hondak, I., Berezutska, N., Dmitrik, V., Gorbenko, V., & Makarenko, V. (2019). Assessment and prevention of the propagation of carbon monoxide over a working area at arc welding. Eastern-European Journal of Enterprise Technologies, 3(10 (99), 38–49. https://doi.org/10.15587/1729-4061.2019.170510

Issue

Vol. 3 No. 10 (99) (2019): Ecology

Section

Ecology

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Copyright (c) 2019 Viacheslav Berezutskyi, Inna Hondak, Nataliia Berezutska, Vitaly Dmitrik, Veronika Gorbenko, Viktoriia Makarenko

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