When should a boiler’s emergency shutdown system be activated?

The emergency shutdown system of a boiler is a crucial safety feature designed to quickly and effectively halt boiler operations when a dangerous situation arises. The primary purpose of this system is to prevent accidents that could lead to injuries, equipment damage, or worse in the event of critical system failures or unsafe operational conditions, such as overheating, abnormal pressure increases, or other malfunctions that pose a risk to safe operation.

Activating the emergency shutdown system during critical failures allows operators to mitigate risks rapidly and protect both personnel and equipment. It's essential that this system is only engaged in emergency situations, ensuring that the operator has the ability to control and manage the boiler safely and effectively.

In contrast, the other scenarios provided do not warrant the use of an emergency shutdown system. Routine maintenance is a planned process that should be performed under controlled conditions, adjustments to system pressure typically occur within normal operating parameters, and conducting a water quality test is a standard procedure that does not involve emergency conditions.