What is considered the ideal pH range for boiler water?

The ideal pH range for boiler water is 10.5 to 12.5. This alkaline pH range is crucial for preventing corrosion and scaling in the boiler system. Maintaining a higher pH helps to minimize the solubility of harmful minerals that might lead to scale formation on the boiler’s internal surfaces. It also provides a protective layer on metal surfaces, safeguarding against corrosive attack.

A pH value lower than this range can lead to increased corrosion rates due to the higher acidity of the water, while a value that is too high may indicate the presence of excessive alkaline substances, which can also lead to other operational issues. Therefore, keeping the pH within the range of 10.5 to 12.5 is essential for the longevity and efficient operation of boiler systems.