Y1
1st Year Apprentice
0 XP total • 500 to next
0 solved
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Boiler Safety Valve Set Pressure
Central Plant Design
Year 3-460 XP
Scenario
A hot water boiler in a central plant has a maximum allowable working pressure (MAWP) of 150 psig. During annual inspection, the inspector notes that the ASME safety relief valve is stamped with a set pressure of 157.5 psig — exactly 5% above the MAWP. The plant engineer argues this provides a small safety margin above normal operating pressure.