API-RP-576
API ICP Self Study Notes API ICP Self Study Notes
car seal Fion Zhang/ Charlie Chong
3.2 Dimensional Characteristics of Pressure-relief Valves 3.2.1 effective discharge area A nominal or computed area used with an effective Dimensional Characteristics of Pressure-relief Valves discharge coefficient to calculate the minimum required relieving capacity for a pressure-relief valve per the preliminary sizing equations contained in API 520. Refer to API 520-1 for the preliminary sizing equations. API 526 provides effective discharge areas for a range of sizes in terms of letter designations, “D” through “T.” 3.2.2 huddling chamber An annular pressure chamber located downstream of the seat of a pressurerelief valve, for the purpose of assisting the valve to achieve lift. Fion Zhang/ Charlie Chong
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- Page 5 and 6: 5 Causes of Improper Performance 5.
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3.2 Dimensional Characteristics of Pressure-relief Valves<br />
3.2.1 effective discharge area<br />
A nominal or computed area used with an effective Dimensional<br />
Characteristics of Pressure-relief Valves discharge coefficient to calculate<br />
the minimum required relieving capacity for a pressure-relief valve per the<br />
preliminary sizing equations contained in <strong>API</strong> 520. Refer to <strong>API</strong> 520-1 for<br />
the preliminary sizing equations. <strong>API</strong> 526 provides effective discharge<br />
areas for a range of sizes in terms of letter designations, “D” through “T.”<br />
3.2.2 huddling chamber<br />
An annular pressure chamber located downstream of the seat of a pressurerelief<br />
valve, for the purpose of assisting the valve to achieve lift.<br />
Fion Zhang/ Charlie Chong
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