What are the discharge limits in temperature and pressure for a boiler blowdown tank?

For a boiler blowdown tank, maintaining appropriate discharge limits in temperature and pressure is crucial for safety and operational efficiency. The correct choice reflects industry standards that ensure the safe handling of water removed from the boiler system.

The chosen answer indicates a discharge temperature of 150 F and a pressure of 5 psi. This limit is significant because it reduces the risk of steam and hot water injuries while allowing the blowdown process to occur effectively. The temperature of 150 F is comfortably below the boiling point of water at atmospheric pressure, which minimizes the risk of vapor formation that can lead to hazardous conditions.

The pressure limit of 5 psi is also safe, ensuring that the system does not exceed safe operational limits while allowing for the necessary removal of impurities from the boiler. Keeping pressure relatively low helps to reduce the risk of equipment failure and improves maintenance scheduling.

In contrast, the other options suggest either higher temperatures or pressures that could pose safety risks, such as increased likelihood of steam generation or equipment stress. Therefore, the discharge limits of 150 F and 5 psi offer a safe and effective range for operation in boiler blowdown systems.