(a) Each operator 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 monthsOffshore............................... At least once each calendar
year, but with intervals not
exceeding 15 months------------------------------------------------------------------------
(b) During inspections the operator 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 atmospheric corrosion is found during an inspection, the operator must provide protection against the corrosion as required by Sec. 192.479. [Amdt. 192-93, 68 FR 53901, Sept. 15, 2003]