Which condition can be created by high-pressure steam migrating into low-pressure areas?

The correct answer is flashing. Flashing occurs when high-pressure steam moves into an area of lower pressure. In this situation, the liquid water that is in contact with the high-pressure steam can rapidly change into vapor as it enters the lower pressure area. This phase change creates a rapid expansion of steam, which is referred to as flashing. Flashing is critical in systems that deal with steam and water because it can affect the efficiency and safety of the system if not properly managed.

The phenomenon is particularly relevant in steam systems where temperature and pressure management is essential. Understanding the potential for flashing helps pipefitters design systems that can handle pressure differentials safely and effectively, preventing issues like equipment damage or operational failures.