What are two primary reasons for using non-metallic liners in pressure vessels?

The use of non-metallic liners in pressure vessels serves several important functions, two of which are to resist erosion and to provide insulation to help reduce shell temperature. Non-metallic liners are often made from materials that have excellent resistance to corrosion and erosion, thereby prolonging the life of the pressure vessel and enhancing its reliability. This is particularly important in environments where aggressive chemicals or high flow velocities can cause wear and damage to the vessel's structural integrity.

Additionally, the insulating properties of non-metallic liners play a crucial role in temperature control within the pressure vessel. By providing a barrier against heat transfer, these liners can help maintain operational efficiency and protect the vessel's outer shell from excessive heat, which can lead to thermal fatigue or failure. Insulation also contributes to energy savings by reducing heat losses.

These functions highlight why the choice regarding non-metallic liners significantly impacts the overall performance and longevity of pressure vessels in various industrial applications.