Abstract：Objective To evaluate occupational health risk at sites in a crane manufacturing enterprise and to provide the basis for occupational risk management and worker' health.Methods A crane manufacturing enterprise was selected and investigated for occupational health. Singapore occupational semi-quantitative risk assessment technique was used to evaluate the exposure risk in workers and compared with classification and occupational exposure limits of occupational hazards at workplaces.Results Benzene, toluene, xylene, manganese, butyl alcohol, butyl acetate, welding fume, silica dust, grinding wheel dust, noise were occupational hazard at the crane manufacturing sites.Results showed 3.28% of all the chemical substance analyzed in our study by Singapore occupational semi-quantitative risk assessment technique were high risk, and 8.2% were moderate risk, and 55.74% were low risk and 32.78% were negligible risk. The risk level of dip coating, welding, bob-weight, coremaking, sand mixing, shakeout were between moderate to high. The job grading of occupational chemical substance were correspondingly: harmless, 98.36%; slight, 1.64%. The results of the two methods were significantly different(P＜0.05)Conclusion Singapore occupational semi-quantitative risk assessment technique could be used in evaluating the risk level of workplaces. However, this technique is limited in evaluating the risk level of physical factor such as noise and heat and should be combined with National Occupational Standards.
