Fire-tube boiler
Videos
A fire-tube boiler is a type of boiler invented in 1828 by Marc Seguin, in which hot gases pass from a fire through one or more tubes running through a sealed container of water. The heat of the gases
Sectioned fire-tube boiler from a DRB Class 50 locomotive. Hot flue gases created in the firebox (on the left) pass through the tubes in the centre cylindrical section, which is filled with water, to the smokebox and out of the chimney (stack) at far right. The steam collects along the top of the boiler and in the steam dome roughly halfway along the top, where it then flows into the large pipe seen running forward. It is then divided into each side and runs downward in the
Lancashire boiler in Germany
Side-section of a Scotch marine boiler: the arrows show direction of flue gas flow; the combustion chamber is on the right, the smokebox on the left.
Worker tending to a Shay locomotive boiler.
Scotch marine boiler
Videos
A "Scotch" marine boiler is a design of steam boiler best known for its use on ships.
German example. Note the steam dome, a typically German feature, and also the corrugated furnaces.
Inside the combustion chamber, looking up at the tubeplate
Rear face of the boiler of steam tug Mayflower, showing the stays supporting the combustion chambers