UFC 3-570-06
JANUARY 31 2003
Table 4-4. Corrosion Survey Potential Measurements
STRUCTURE TYPE
POTENTIAL MEASUREMENT LOCATIONS
PIPELINES
Locate the reference cell:
a) Over the pipeline at all test stations and at all points where the
structure can be contacted (where it enters/exits the ground,
passes through a pit, or is exposed
b) Over the pipeline at least every 305 meters (1000 feet) for
pipelines off the installation
c)
Over the pipeline at least every 152 meters (500 feet)
for pipelines on the installation
ON GRADE STORAGE
Locate the reference cell:
TANKS
a) Next to the tank at four equally spaced locations around the
tank circumference
b) At a distance one tank radius away from the tank at eight
equally spaced locations around the tank circumference
UNDERGROUND
Locate the reference cell:
STORAGE TANKS
a) Over the center and each end of the tank.
b) Over each end of the feed/return piping.
c) Over the manhole, fill pipe & vent pipe.
d) Over all metallic structures in the area if readings indicate an
isolated system is shorted to a foreign structure.
4-6
Previous Page
