What is the term for boiler water that is carried into steam lines?

The term for boiler water that is carried into steam lines is known as priming. Priming occurs when water and steam are produced together within the boiler, leading to the entrainment of water droplets along with the steam that is generated. This situation can happen when the operational parameters of the boiler, such as steam generation rates or water quality, are compromised, resulting in water being carried into the steam system. Priming can have detrimental effects on performance and equipment, such as corrosion, water hammer, and reduced efficiency in the steam distribution system.

Understanding priming is crucial for maintaining boiler efficiency and safety. Effective boiler operation requires managing both the quality of the feedwater and the steam quality to prevent priming. Operators often monitor for signs of priming and take corrective actions, such as adjusting water levels or conditioning the water, to ensure that only dry steam is produced for use in the steam lines.