Worked example using Fauskes method

The Table below gives data (see 6.5) at the relief pressure of 2.0 bara  

Since relief is via a safety valve, F can be taken as 1 because friction is accounted for by the discharge coefficient below. 

As the safety valve has a de-rated discharge coefficient of 0.87, then A=0.0383/0.87 = 0.044 m2. In this case, Fauske s method gives a slightly higher relief area than the 0.0378 m2 given by Leung s method. 

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A worked example of the use of Fauske s method for relief sizing is given below. 

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