Steam distribution lines undertake the task of transporting the steam in the system to the point of use at the desired quality and pressure. A small scale steam system distribution line will cause the steam to reach the point of use at low pressure and cause high pressure losses. However, it causes the performance of the device to decrease, the risks of wear increase, insufficient steam supply and noise due to the increase in steam velocity. On the contrary, a large-scale steam distribution line causes increased costs, heat losses, the formation of extra condensed water on the line due to heat losses, and thus an increase in the number of steam traps.

The pressure and closed container that are used to obtain steam from water in the desired amount, temperature and pressure as a result of the burning of any fuel, are called steam boilers.