The background and scope of application of the Regular Calibration Rules for Breathing Valves(T/ZJASE 024-2023)are expounded,and the main contents of the standard such as basic requirements,calibration implementation,result evaluation,record and report of breathing valves are clarified.The understanding and implementation of the standard provisions are explained through the calibration cases of breathing valves for atmospheric tank trucks and oil storage tanks.In order to facilitate the technical person-nel to master and apply the standard.
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