What are stay tubes in boiler?
Thereof, how are boiler tubes supported?
The stay tubes with an increased diameter act as support for the boiler. Both types are welded onto the lower and upper tube plates. The steam space is formed by the shell plate and internal cone. In the exhaust gas boiler tubes, heat from the main engine exhaust gas is transferred to the water side by convection.
Beside above, what material are boiler tubes made of? steel
Then, what do you mean by fire tube boiler?
A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or (many) more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.
Which is more efficient fire tube or water tube boiler?
Between the two types of boiler designs, water tube boilers are remarkably more efficient than their fire tube counterparts. Additionally, since the tube holds less water than the water tank of a fire tube design, it takes less time to turn that water to steam — and by extension, less fuel.