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The self-calibration efforts of the Yulin Coal Chemical Logistics and Maintenance Center of Shaanxi Yanchang Petroleum have yielded tangible results. Author/Source: Yulin Coal Chemical, Shaanxi Yanchang Petroleum; Date: May 7, 2022; Page views: 13. Since the beginning of this year, the center has earnestly implemented the company’s requirements regarding cost control and efficiency improvement. Based on its actual operational conditions, it has conducted thorough analyses and scientific assessments, and taken concrete measures—such as the self-calibration of various types of alarms—to achieve these goals. It is reported that the company currently has 660 fixed on-site detectors for flammable and toxic gases, as well as over 420 portable detectors of various types for such gases. As is standard practice, these detectors are sent for calibration every year; the cost of calibrating each toxic gas detector is 930 yuan, while the cost for each flammable gas detector is 660 yuan. The costs associated with these calibrations are extremely high. To this end, the staff of the analysis and metrology team at this center obtained the **certificates of registered metrologist recognized by the relevant authorities, and after being granted metrological standard assessment certificates by the Yulin City Market Regulation Bureau, they were able to carry out independent calibration work successfully. After more than a month of effort, a total of 247 fixed toxic gas detectors, 311 fixed combustible gas detectors, and over 150 various portable toxic and combustible gas detectors were tested. This is expected to save the company over 500,000 yuan in testing costs, thereby helping to reduce expenses and increase efficiency. In addition, the center actively carries out activities to repair and reuse existing assets, continuously reducing costs related to equipment consumables and external repairs; it ensures that repairs are carried out whenever possible and savings are achieved wherever feasible, thus making a positive contribution to the company’s efforts to control costs and improve efficiency.