Being as one of China's largest oil and gas producer and suppliers, China National Petroleum Corporation (CNPC), with more than 1,500,000 employees, has about 90 large and medium subsidiary enterprises, and occupational hazard inevitably occur during the construction and production operation, which has the characteristics of wide geographic distributions, enormous employees contacting hazard factors and various hazard factors resulting in occupational diseases. According to the characteristics of occupational disease hazard factors in petroleum and petrochemical industry, and characteristics of occupational health hazards for oversea operations and field operations, CNPC has set up its own occupational health (OH) management models to control occupational disease hazards from the source. In recent years, 92–97% of the employees contacting hazard factors have passed occupational health examinations and there were no hazard accidents of occupational diseases. Therefore, the job concerning OH has obtained satisfactory results.

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