Why must the pressure for leak testing in the groove be 50 KPa?
Thread Content
Our company restarted operations after recent parking for maintenance. During the leak test of the electrolyzer before starting up, the pressure was 35 KPa (as indicated by experts from Beihua Machinery). The current level rose to 6 KA at the time of startup, to 9 KA the next day, and to 13.6 KA on the third day; thereafter, a leak appeared at the upper end of the cathode outlet hose of one of the cells. The operation was stopped immediately for inspection, and it was found that no gasket had been installed on that hose. No leaks were detected in that cell during the leak test. I would like to ask the teachers: in the operating procedures provided by Beihua Machinery, the pressure used for tank leak testing is 50 KPa. What is the basis for this value of 50 KPa?
Personally, I think it is related to the pressure control of hydrogen chloride gas in the past; previously, the pressure control in electrolyzers with high electrical density was also high. The groove leak test showed no leaks because of the use of pure water and minimal temperature changes; however, after operation the temperature rose, and the results changed.