(a) You must inspect each pipeline or portion of pipeline that is exposed to the atmosphere for evidence of atmospheric corrosion, as follows: ------------------------------------------------------------------------
Then the frequency of
If the pipeline is located: inspection is:------------------------------------------------------------------------Onshore................................... At least once every 3
calendar years, but with
intervals not exceeding 39
months.Offshore.................................. At least once each calendar
year, but with intervals
not exceeding 15 months.------------------------------------------------------------------------
(b) During inspections you must give particular attention to pipe at soil-to-air interfaces, under thermal insulation, under disbonded coatings, at pipe supports, in splash zones, at deck penetrations, and in spans over water.
(c) If you find atmospheric corrosion during an inspection, you must provide protection against the corrosion as required by Sec. 195.581.