The set pressure of the safety valve on the HF storage tank is much higher than the maximum operating pressure. . .
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I’ve seen an HF storage tank whose safety valve setting pressure was much higher than the maximum operating pressure – about three times higher. Is that appropriate? Are there any relevant standard requirements?
I’m a beginner; I hope the more experienced users can give me some guidance.
It’s definitely not correct; according to the standards, the setting pressure of a safety valve must not be higher than the maximum allowable operating pressure. The maximum allowable operating pressure of a device is the lower value of the pressures calculated based on the effective thickness of the pressure-bearing components. If the setting pressure of the safety valve, that is, its opening pressure, is higher than the maximum allowable operating pressure, then the device is very likely to get damaged.
The set pressure of this container safety valve does not exceed the design pressure.
In that case, there will definitely be no problem.
Although the set pressure of the container’s safety valve is more than three times the maximum operating pressure (the pressure at which operation is not permitted), it still falls within the design pressure range; so according to you, this is acceptable； Based on the properties of the medium, it is also somewhat necessary; is this understanding correct?
That's how it is. I ask you in return: why is the design pressure of this device so much higher than the operating pressure?
I’ll go back and consult my colleagues and mentor.
1. The maximum operating pressure is different from the maximum allowable operating pressure. 2. The maximum operating pressure falls within the design pressure range. 3. The maximum allowable operating pressure can be higher than the design pressure. 4. If it’s three times higher, is it meaningful to have such a safety valve? (I don’t know the operating conditions.)