The lifecycle of current HDPE pipes in potable water applications
The lifecycle of current HDPE pipes in potable water applications
The lifecycle of current HDPE pipes in potable water applications
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Current R&D … Service Life Evaluation (Jana/PPI 2009)<br />
http://www.janalab.com/pdf/Service%20Life%20Evaluation%20F<strong>in</strong>al%20with%20Abstract.pdf<br />
Oxidation Induction Time<br />
(OIT)<br />
Indirect measure <strong>of</strong><br />
level <strong>of</strong> stabilization<br />
Measures time to<br />
oxidize <strong>in</strong> oxygen<br />
environment at 200<br />
o<br />
C<br />
Carbonyl Ratio<br />
Measured through<br />
FTIR (Fourier<br />
Transform Infra-red)<br />
Measure <strong>of</strong> relative<br />
level <strong>of</strong> oxidation<br />
Simple use <strong>of</strong> OIT or Carbonyl<br />
Ratio (or both together) as a direct<br />
<strong>in</strong>dication <strong>of</strong> rema<strong>in</strong><strong>in</strong>g service life<br />
is not possible and can be<br />
mislead<strong>in</strong>g.<br />
<strong>The</strong>refore, forecast<strong>in</strong>g <strong>of</strong> residual<br />
pipe lifetime can be achieved by<br />
exhum<strong>in</strong>g <strong>in</strong> service pip<strong>in</strong>g, test<strong>in</strong>g<br />
to ASTM F2263 and consider<strong>in</strong>g<br />
the utility’s specific operat<strong>in</strong>g<br />
conditions<br />
www.janalab.com
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