What is the typical operating pressure range for a boiler in 4th class power engineering?

In 4th class power engineering, the typical operating pressure range for a boiler is between 15 to 100 psi. This range is commonly used for low-pressure boilers, which are the focus for many applications such as heating systems, process heating, and other industrial uses. Operating within this pressure range ensures safety in the operation of the boiler while providing adequate heat transfer to meet demand.

Boilers operating below 15 psi generally fall into the category of low-pressure systems, which are less common for industrial applications and are typically used for residential heating. Conversely, pressures above 100 psi are generally characteristic of high-pressure boilers, which require additional training and certification due to the increased risks involved. The 15 to 100 psi range is suitable for most applications encountered in the 4th class power engineering curriculum, balancing efficiency and safety effectively.