Objective To analyze the occupational hazards in the machinery plant in Wuhan, and to provide basis for environmental improvement, occupational disease prevention and control, and relevant policy-makings.
Methods Investigation was carried out on the occupational hazards and their prevention and control countermeasures in 4 machinery plants in Wuhan in accordance with national occupational hygienic standards and relevant criteria.
Results Noise was widespread, the overall exceeding rate was 35.2%, and the top 3 job-titles were grinding (59.3%), shot blast (55.6%) and stamping (52%). Industrial dust were found mainly in welding, the exceeding rates of grinding wheel dust and welding fume were 13.0% and 11.9% respectively; and the time weighted average (TWA) of welding fume was 6 times the permissible limits. Five chemical toxicants were monitored, among which benzene, toluene and manganese exceeded the national standard with the exceeding rates of 44.4%, 12.7% and 11.5% respectively, and they were mainly distributed in workplaces of spray painting and welding; the TWA of manganese was 16 times the concentration of permissible limits.
Conclusion Noise, benzene analogs and dust are the main occupational hazards in Wuhan machinery plants. It is necessary to take effective measures to protect workers' health.
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