When securing a boiler after usage, when should the feedwater be secured?

Study for the Massachusetts 3rd Class Engineer Exam. Access flashcards and multiple choice questions with hints and explanations. Prepare for success on your exam!

Securing the feedwater to a boiler is a critical step in its safe operation and maintenance. The correct approach is to secure the feedwater when the boiler pressure reaches a predetermined low level, typically between 10 to 15 psig. This practice helps to protect the boiler from potential damage that could occur from low water levels or overheating once the system is depressurized.

At this pressure range, the boiler is still under controlled conditions, allowing for a safe shutdown process. This helps ensure that there's enough pressure to allow for proper drainage and to avoid negative consequences that can arise from abrupt pressure changes. Additionally, stopping the feedwater at this point prevents excess water from entering a boiler that may not be operational, which could lead to potential operational hazards.

When feedwater is secured only after the boiler has been completely emptied or at 0 psig, there are risks associated with mismanagement of water levels and heat retention, which could compromise the boiler's integrity. Also, asserting there are no specific requirements for securing feedwater does not align with standard safety protocols and operational guidelines frequently applied in boiler management practices. Properly managing the feedwater supply contributes to the safety and efficiency of boiler operations, guiding operators to maintain optimal conditions until a secure shutdown is achieved

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