What defines Erosion Services according to the text?

Erosion Services are defined in the context of refractory personnel as concerning fluid solid units, particularly in processes that involve the movement of materials through systems such as transfer and overhead lines. These units can be subject to wear and degradation due to the flow of materials, which can lead to erosive wear on the refractory linings and structures involved. This focus highlights the importance of understanding how materials interact with their containment systems under specific conditions, especially in the context of maintaining efficiency and integrity in high-temperature environments where refractories are utilized.

The emphasis on fluid solid units is crucial because it directly relates to the design and maintenance of systems that transport various materials, underlining the need for appropriate refractory solutions to mitigate wear and extend service life. This understanding is essential for professionals in the field, as they need to ensure that refractories are suited to withstand the erosive effects of materials being processed, thus safeguarding against potential failures in high-demand industrial applications.