What is the boil out pressure for boilers operating at 1400 kPa or less?

The boil out pressure for boilers operating at 1400 kPa or less is indeed the operating pressure itself. This concept is based on the necessity of ensuring that any potential contaminants within the boiler water are effectively removed. During the boil-out process, the boiler is brought to its operating pressure to facilitate the removal of oils, greases, and other impurities.

Setting the boil out pressure to the operating pressure ensures that the boiler can operate safely and efficiently once returned to normal use. This method allows for the thorough cleaning of the boiler system while it remains under conditions that simulate actual operational scenarios.

By utilizing the actual operating pressure, it ensures that the system experiences the thermal and pressure conditions it will encounter during regular functioning, promoting effective cleaning and proper maintenance practices.