Which type of boiler is most likely to cause a boiler explosion due to its large volume of water?

The type of boiler most likely to cause a boiler explosion due to its large volume of water is the fire tube boiler. Fire tube boilers have a design where hot gases from the combustion process travel through tubes submerged in water. This results in a larger volume of water contained within the boiler compared to some other types, particularly water tube boilers.

In the event of a malfunction, such as a failure in the boiler's pressure relief systems or a sudden rise in temperature, the significant volume of water in a fire tube boiler can lead to a rapid increase in steam pressure. If this pressure exceeds the design limits of the boiler, it can create a highly hazardous situation, potentially leading to an explosion.

The design of fire tube boilers, while efficient for heating and generating steam, necessitates careful monitoring and strict adherence to safety protocols to mitigate the risks associated with the large volume of water they inherently possess.