What is "thermal shock" in relation to boilers?

Thermal shock refers to the phenomenon where rapid changes in temperature induce stress in materials, particularly in the context of boilers. When a boiler experiences sudden temperature fluctuations—such as when cold water is introduced into a hot boiler—this can lead to uneven expansion or contraction of the materials that make up the boiler. Over time, this thermal cycling can create cracks or weaknesses in the structure, potentially leading to failures or leaks.

Understanding thermal shock is crucial for maintaining boiler integrity and safety. It highlights the importance of gradual temperature adjustments and proper operational procedures to prevent these rapid changes in temperature that could endanger the boiler and its components. While other options reference boiler operations or safety measures, they do not accurately describe the specific impacts of thermal shock on the material properties and operational reliability of boiler systems.