A completely full water storage tank is being hydrostatically tested to 200 psig using a positive displacement pump (PDP) with a smooth and constant discharge flow rate of 6 gpm.
The tank is protected by two relief valves that discharge to the atmosphere.
The relief valves have the following characteristics:
- Relief valve A opening setpoint is 200 psig with an accumulation of 1.5 percent.
- Relief valve B opening setpoint is 200 psig with an accumulation of 3.0 percent.
- Each valve has linear flow rate characteristics and a maximum discharge flow rate of 6 gpm.
The PDP is inadvertently left running when tank pressure reaches 200 psig.
With the PDP running continuously, what will be the discharge flow rates of the relief valves when tank pressure stabilizes?
Show Answer
Answer: D
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