Haw. Code R. § 6-77-139 - Remedial measures: transmission lines
(a) General
corrosion. Each segment of transmission line with general corrosion and with a
remaining wall thickness less than that required for the maximum allowable
operating pressure of the pipeline must be replaced or the operating pressure
reduced commensurate with the strength of the pipe based on actual remaining
wall thickness. However, if the area of general corrosion is small, the
corroded pipe may be repaired. Corrosion pitting so closely grouped as to
affect the overall strength of the pipe is considered general corrosion for the
purpose of this subsection.
(b)
Localized corrosion pitting. Each segment of transmission line pipe with
localized corrosion pitting to a degree where leakage might result must be
replaced or repaired, or the operating pressure must be reduced commensurate
with the strength of the pipe, based on the actual remaining wall thickness in
the pits.
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