What is one of the main causes of boiler scale build-up?

Boiler scale build-up primarily occurs due to contaminants in the feedwater. When feedwater contains minerals such as calcium, magnesium, and silica, these substances can precipitate out of the water when it is heated, forming deposits on the boiler's internal surfaces. This scale can significantly reduce the efficiency of heat transfer and potentially lead to overheating and damage to the boiler.

Contaminants typically come from various sources, such as the natural source of the water being used or from treatment chemicals that may not have been properly controlled. Ensuring that the feedwater is treated to remove these impurities is crucial in preventing scale build-up, thereby maintaining boiler efficiency and safety.

Understanding this process is essential for anyone involved in the operation of steam systems, as it underscores the importance of proper water treatment protocols.