The boiler is a combination formed with a boiler in which water or other liquid is heated and thus steam is obtained. This mechanical installation uses a hot water boiler, steam boiler, solar collector or electric heaters as the heat source.

The heated or evaporated liquid exits the boiler for use in many ways, including water heating, central heating, boiler-based power generation, cooking and sanitation. Boilers are classified in different ways according to their different characteristics.

For example, with external ignition and internal ignition depending on the position of the boiler, low pressure and high pressure according to the power of pressure, natural circulation and forced circulation according to the circulation method, fixed and portable according to the use of the boiler, solid fuel, liquid fuel and gas classified as fueled. However, the most common classification in the market is in the form of jacketed boilers and serpentine boilers.

The boilers have two types of feed water supply. One of them is steam returning from processes. The other is raw water supplied from outside the boiler room processes. The steam system is the main control system for boiler processes.

This system collects and controls all vapors produced. Then it sends the steam through the pipes to the point of use. As the boiler is a system operating under pressure, processes, valves, steam pressure gauges and similar equipment are kept under control and steam pressure is regulated.

The standards that are taken as basis in the control and inspection works carried out by the competent authorities are as follows:

• TS 736 Hot water conditioners - Boilers with hot water, boiling water or steam

• TS ISO 1129 Steel tubes - Boilers - For super heaters and heat exchangers - Dimensions - Tolerances and acceptable masses per unit length

• TS 2025 Steam boilers operating - General rules of inspection and maintenance