What is the maximum acceptable concentration of oxygen in boiler water?

The maximum acceptable concentration of oxygen in boiler water is crucial for maintaining the integrity of the boiler and preventing corrosion. A concentration of 5-7 ppb (parts per billion) is widely acknowledged as the maximum acceptable level for oxygen in boiler water systems.

At this range, the likelihood of oxygen-related corrosion, particularly in ferrous materials, is significantly reduced. Corrosion caused by oxygen can lead to pitting and deterioration of boiler components, which can ultimately jeopardize the operational safety and efficiency of the system.

Setting the maximum concentration at 5-7 ppb ensures that operational and safety objectives are met while allowing for small variations and ensuring some stability in the water chemistry. Maintaining levels below this threshold helps prolong the lifespan of the boiler and reduces maintenance costs associated with damage from corrosion.

Understanding the importance of keeping oxygen concentrations within specified limits ensures a reliable and efficient operation of boiler systems.