Why is purging conducted in a boiler?

Purging in a boiler is primarily conducted to remove combustional gases from the combustion chamber and any other parts of the system where these gases can accumulate. This is an essential safety measure, as it helps to eliminate potentially explosive mixtures of gas and air before the boiler is started up or after maintenance work has been performed. The process ensures that the boiler operates safely and efficiently by preventing the risk of combustion failure, which can lead to hazardous situations.

While other processes related to a boiler might include managing water levels or improving efficiency, the specific purpose of purging focuses on clearing out hazardous gases, ensuring that combustion when initiated occurs in a safe environment. Understanding this importance highlights the critical role purging plays in maintaining boiler safety and optimal operation.