External visual inspections, including inspections for CUI, should be conducted at maximum intervals listed in Table 2
to evaluate items such as those in API 574. Alternatively, external visual inspection intervals can be established by
using a valid RBI assessment conducted in accordance with API 580. This external visual inspection for potential CUI
is also to assess insulation condition and shall be conducted on all piping systems susceptible to CUI listed in API
574. The results of the visual inspection should be documented to facilitate follow-up inspections.