SCOTLAND
- Normal
Transmission Pipeline Survey 
- survey of buried transmission pipelines to monitor changes
in the condition of the wrap or coating ...
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Survey of a
buried pipeline in Scotland belonging to a major oil company. The
line was less than 2 years’ old and this section had only recently
been surveyed, using traditional ‘ground contact’ methods which
necessitated walking the entire length. 2 faults had been located
but not yet repaired.
After setting up the
Signal Generator, 5.5km of pipeline were surveyed in less
than 2 hours. This included current attenuation surveys of
each section to determine general condition, printing a survey
report, and the location of faults on those sections shown
to have high attenuation readings. The total distance actually
walked in the
survey was less than 500 metres.
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7 faults
were located - including the 2 previously found by the ‘ground
contact’ system. All of these were confirmed by excavation
and subsequently repaired. A later ‘quick check’
survey indicated that the line was now in good condition throughout. |
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