Why must activated carbon steel pressure containers be lined with epoxy or resin?

Activated carbon steel pressure containers are often lined with epoxy or resin primarily to prevent corrosion. This is crucial because exposure to moisture, chemicals, and other environmental factors can lead to deterioration of the steel over time. Corrosion can weaken the structural integrity of the container and can also lead to potential leaks, which can compromise safety and efficiency in wastewater applications. The lining provides a protective barrier, enhancing the longevity of the container and ensuring that it functions effectively without the risk of exposure to corrosive elements.

Other reasons, such as enhancing filtration efficiency or improving conductivity, are not the primary motives for lining these containers. The concern with weight reduction is also not relevant, as the main focus is on protecting the container from deteriorating due to its operational environment. Thus, the importance of the epoxy or resin lining in preventing corrosion makes the selection of this option the most appropriate choice.