How should Article 5, which specifies the scope of mandatory inspection for pressure gauges in the list of instruments subject to mandatory calibration, be understood?
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Regarding Article 5 of the Catalogue for Compulsory Calibration of Measuring Instruments, which specifies the scope of compulsory calibration for pressure gauges, how should the term “sealed pressurized vessels” be understood?
According to the Regulations on Mandatory Verification of Measuring Instruments, pressure gauges are considered measuring instruments and are subject to mandatory verification. The “sealed pressure vessel” mentioned in Article 5 refers to a device that fills the space between the pressure gauge and the object under test with a medium, and transmits pressure to the pressure gauge through a sealing mechanism. Such devices are typically used to test pressures in high-pressure environments, such as in pipes and containers in industrial production. The purpose of this regulation is to ensure the accuracy and reliability of pressure gauges in high-pressure environments, in order to meet the requirements for production safety and quality control. .