Until now, it is generally known as two types of boilers, namely caldera pirotubular, and boiler water tube. Both types of boilers are widely used by industries that require high pressure in the process. In a fire tube boiler, the pipes will be passed by hot gas, then the water in the shell will be converted into steam. Fire tube boilers are usually used for relatively small steam capacities with low to moderate steam pressures.
In operating guidelines, fire tube boilers must reach a certain steam speed to meet the standards produced. Fire tube boilers can use fuel oil, gas or solid fuel in their operations. For economical reasons, most fire tube boilers are constructed as “package” boilers (assembled by factories) for all fuels.
The caldera pirotubular is divided into several types, two of which are Simple Vertical boilers and Cornish boilers. The Simple Vertical boiler is one type of boiler in the form of a vertical cylinder used to produce water vapor as a driving force or heater. In this boiler, the fire and combustion gases enter through pipes and are surrounded by water. The fuel used is in the form of solid fuels such as coal and wood, which are burned at the bottom of the boiler. The hot gas from combustion is inserted into the pipes in the cylinder which will heat the boiler water to steam or saturated steam at low pressure.
Then there is the Cornish Boiler. This type of boiler is included in a single tube steam boiler, there is only one hallway, whether it’s a fire or water channel. Cornish boilers generally range between 1-2 meters and lengths vary between 5 – 7.5 meters. Lower working capacity and pressure. Cornish boiler is a single fire tube boiler and a simple vertical boiler is a single water tube boiler.