Is the pressure value reasonable?
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This post was last edited by zjq1962 on 2017-11-18 at 10:45. If there is a device equipped with a safety valve that needs to undergo a gas-tightness test, the operating pressure is 1.97 MPa, the design pressure is 2.16 MPa, the maximum allowable operating pressure is 2.17 MPa, the setting pressure of the safety valve is 2.17 MPa, and the hydrostatic test pressure is 2.72 MPa. Let’s discuss whether such pressure settings are reasonable. Explain the reason
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It is unreasonable; the setting pressure of the safety valve is too close to the pressure used for the airtightness test. During the airtightness test, the safety valve may activate.
The set pressure of the safety valve shall be ≥ design pressure ÷ 0.97, and the maximum allowable operating pressure shall be ≥ set pressure of the safety valve × 1.03.
This post was last edited by SDHZZXM on 2017-11-20 09:48. It is unreasonable; please see the link: Regarding the allowable maximum operating pressure https://bbs.hcbbs.com/forum.php? ... 62679&extra=&page=2
If there is a device equipped with a safety valve, it is necessary to conduct a gas-tightness test. The operating pressure is 1.97 MPa, the design pressure is 2.16 MPa, the maximum allowable operating pressure is 2.17 MPa, the setting pressure of the safety valve is 2.17 MPa, and the hydrostatic test pressure is 2.72 MPa. Let’s discuss whether such pressure settings are reasonable. Explain the reason: In the owner’s case, the working pressure is less than the design pressure, which is equal to the airtightness test pressure; this value is again less than the setting pressure of the safety valve and equal to or less than the maximum allowable working pressure. This is correct. It’s just that the numbers are too close.