What should be done if deterioration is expected behind internal components?

When deterioration is expected behind internal components of a pressure vessel, removing those components for inspection is the most appropriate action. This allows for a thorough examination of the areas that are not visible during a standard external inspection. By accessing the internal components directly, inspectors can identify any signs of corrosion, cracking, or other forms of degradation that may not be detectable from the outside.

Visual inspection alone may not adequately reveal the extent of the deterioration, especially if it is hidden behind internal structures. Simply replacing the entire internal setup is a more drastic and costlier measure that doesn't address the need for an accurate assessment of existing conditions. Postponing the internal inspection could lead to further deterioration, potentially compromising the integrity and safety of the pressure vessel. Therefore, removing the components for a detailed inspection is the recommended action to ensure the reliability and safety of the equipment.