What is the main function of the headers in a firetube boiler?

The main function of the headers in a firetube boiler is to collect water and steam. In a firetube boiler, the headers play a crucial role in facilitating the flow of water and steam within the system. The headers are typically positioned at both the top and bottom of the boiler.

At the upper header, steam collects as it separates from the water, allowing it to be directed out of the boiler for use in heating or powering equipment. The lower header serves to gather water that has not yet been converted into steam, ensuring there is a continuous supply of water to maintain efficient operation and prevent damage to the boiler from low water levels.

This design efficiently channels both phases of water and steam, maintaining proper circulation and ensuring that the boiler operates safely and effectively.