In addition to resisting erosion, what else do non-metallic liners aim to achieve?

Non-metallic liners are primarily used to protect pressure vessels from erosion, but they also serve to reduce shell temperature. These liners can enhance thermal insulation properties, which helps in maintaining the desired operating temperature of the vessel. By reducing the shell temperature, these liners help prevent potential thermal-related issues, such as reducing the risk of corrosion or fatigue in the underlying metal structure. This is particularly relevant in systems where temperature management is critical to ensure safety and extend the lifespan of the pressure vessel.

The other options relate to undesirable outcomes. Decreasing structural integrity or increasing shell temperature would compromise the safety and performance of the vessel. Additionally, enhancing chemical reactivity is not a function of non-metallic liners; instead, they are designed to minimize chemical interactions that could lead to deterioration or failure. Therefore, reducing shell temperature is a beneficial attribute that aligns with the role of non-metallic liners.