The Boiler Series (Part 3 of 3): Single or Multi? – Gas Flows in Fire-tube Boilers

The number of passes in the gas flow is another way to classify fire-tube boilers. This is applicable for fire-tube boilers as the flue gases are traveling in the tubes of the boiler. In general, fire-tube boilers are either single-pass or multi-pass type.                   Multipass boiler   …