Explosion pressure of the burst disc
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Dear teachers, the design pressure of our company’s storage tanks is 150 mmH2O, with an operating temperature of 40 degrees Celsius. The nameplate on the vent valve installed on the tank top indicates two burst pressures: 157 mmH2O at 22°C； At 40°C, it is 157 mmH2O. Since 157 mmH2O is greater than the design pressure of the tank, is there a problem with this? Also, why are two set pressures indicated for rupture discs? Is there any expert who can explain this?
Which company manufactured it? It seems that the pressure of the burst disc isn’t indicated in mmH2O Can I take a photo of the brand name and send it?
This is imported, and the parameters on it cannot be seen. The two pressures and temperatures you mentioned refer to the corresponding burst pressures of rupture discs from the same batch at different temperatures
I made a mistake at first; the parameter above is: 157 mmH2O at 22°C； 150 mmH2O at 40°C ； It meets the specification requirements at 40°C, but at 22°C the burst pressure exceeds the design pressure of the tank. What’s your opinion on this?
This is normal; the bursting pressure of rupture discs from the same batch decreases as the temperature rises. Therefore, it is essential to determine the temperature under which they will be used.
The burst pressure of the rupture disc should be lower than the design pressure