How does a Triad firetube boiler compare to a watertube boiler?
Firetube boilers tend to have better heat transfer and less exposure to corrosion and scale. In a firetube boiler, the outer tube surface is in contact with the water. Since the outer surface of the tube is greater than the inner surface, heat is more efficiently transferred to the water. The occurrence of corrosion and scale increases with temperature. Because the tubes in a watertube boiler have a higher relative temperature there is a greater chance of increased scale and corrosion.
