Safety valves are the last barrier to protect pressurized equipment,and the accuracy of the set-ting pressure of safety valves is related to equipment safety.This paper calculates and analyses the set-ting pressure of safety valves,and shows that the setting pressure value obtained from online hot calibra-tion of steam safety valves is smaller than that obtained from offline calibration,and the higher the tem-perature of the steam medium in the actual working condition of the safety valve,the larger the devia-tion of the setting pressure obtained from the cold and hot states.In this paper,through numerical cal-culations and online and offline calibration of the safety valve setting pressure values were analyzed,and a mathematical model was established,from the perspective of numerical calculations to give the safety valve for steam boilers in the differential temperature conditions of the test temperature correction meth-od to guide the high temperature conditions of the safety valve calibration work.
维普
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