GB 10331-1989 Standard for Hygienic Control of Limestone Dust in Workshop Atmospheres
The General Administration of Quality Supervision, Inspection and Quarantine of Peoples Republic of China (AQSIQ) promulgated the GB10331-1989 Standard for Hygienic Control of Limestone Dust in Workshop Atmospheres (hereinafter referred to as the Standard). It was formally implemented on March 1, 1989.
GB10331-1989 Standard for Hygienic Control of Limestone Dust in Workshop Atmospheres applies to workshops and other production and operation activities where limestone dust is generated. The standard sets the Hygienic Indicators for the concentration of limestone dust in the workplace environment measured, the Hygienic Limit for the daily average concentration of limestone dust in the workplace environment, and Hygienic Standards for air volume.
The Hygienic Indicators for the concentration of limestone dust in the workplace environment shall be expressed as the total amount or average concentration of the inhalable fraction and the respirable fraction, expressed in units of milligrams per cubic metre of air particles (mg/m3). Hygienic Limit for the concentration of limestone dust in the workplace environment. The Hygienic Limit for the daily average concentration of limestone dust in the workplace environment is 2 mg/m3 (dust) particle size fraction of less than 10 µm, and 6 mg/m3 (dust) particle size fraction up to and including 100 µm.
The Hygienic Standard for air flow is to ensure that the ratio of air flow to air volume is not less than 6:10, that is, the air pressure is not less than 0.6, and the amount of fresh air entering each shift must not be less than 6000 cubic metres. In addition, dust sources and settling dust areas must be equipped with appropriate safety devices.
The implementation of the GB 10331-1989 Standard for Hygienic Control of Limestone Dust in Workshop Atmospheres is conducive to protect the health of employees and prevent air pollution, improve the monitoring ability of the administrative departments and enhance the ability to maintain a good production and working environment in the workshop.
In order to ensure the smooth implementation of the Standard, the administrative departments must be strengthened and guide and supervise the production and operators, occupation health organizations and monitoring institutions, and should assist the production and operators in solving the problems of dust control technologies and dust prevention facilities.
In order to prevent the inhalation of limestone dust, good hygiene habits should also be maintained in the workplace, such as covering the dust of sandblasting, covering the dust of sanding and polishing, wearing masks and other protective clothing, and strengthening the cleaning of the workplace.
In conclusion, the GB10331-1989 Standard for Hygienic Control of Limestone Dust in Workshop Atmospheres is designed to help protect the health of workers and minimize air pollution. The relevant departments should strengthen their guidance and supervision of the production, operation companies and inspection organizations, and at the same time, production personnel should also increase the awareness of occupational health and safety and personal protection, in order to ensure that they can do their job healthily and safely.
