What is the relief valve setting on a propane tank (pressure vessel)?

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Multiple Choice

What is the relief valve setting on a propane tank (pressure vessel)?

Explanation:
Overpressure protection: the relief valve is there to vent gas before the vessel is pushed past its design limit. A propane storage vessel is designed for a maximum allowable working pressure around 250 psi, so the relief valve is set to open at that pressure to prevent the pressure from exceeding safe levels. If the setting were much lower, it would vent during normal operation or minor temperature changes; if it were higher, the vessel could reach unsafe pressures before venting. Therefore, 250 psi is the standard relief setting.

Overpressure protection: the relief valve is there to vent gas before the vessel is pushed past its design limit. A propane storage vessel is designed for a maximum allowable working pressure around 250 psi, so the relief valve is set to open at that pressure to prevent the pressure from exceeding safe levels. If the setting were much lower, it would vent during normal operation or minor temperature changes; if it were higher, the vessel could reach unsafe pressures before venting. Therefore, 250 psi is the standard relief setting.

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