Download AWWA standard [for] polyethylene encasement for ductile-iron by American National Standards Institute.; American Water Works PDF

By American National Standards Institute.; American Water Works Association

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Additional resources for AWWA standard [for] polyethylene encasement for ductile-iron pipe systems

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5], low or negative redox potential [negative to +100 mV], and the presence of sulfides [positive or trace]); and (3) where the water table is intermittently or continually above the invert of the pipe. Copyright American Water Works Association Provided by IHS under license with AWWA No reproduction or networking permitted without license from IHS Licensee=Earth Tech Inc/5906698001, User=Yanez, Simon Not for Resale, 04/21/2008 18:05:05 MDT This page intentionally blank. --``,`,,``,,`,,```,`,,``,,,``,,-`-`,,`,,`,`,,`--- Copyright American Water Works Association Provided by IHS under license with AWWA No reproduction or networking permitted without license from IHS Licensee=Earth Tech Inc/5906698001, User=Yanez, Simon Not for Resale, 04/21/2008 18:05:05 MDT --``,`,,``,,`,,```,`,,``,,,``,,-`-`,,`,,`,`,,`--- AWWA is the authoritative resource for knowledge, information, and advocacy to improve the quality and supply of water in North America and beyond.

Experience with existing installations. The best information on soil corrosivity with respect to ductile-iron pipe results from experience with this material in the area under investigation. Every effort should be made to acquire these data by questioning local officials and, if possible, by observing existing installations. Soil-Test Evaluation When the soil-test procedures described in this standard are employed, the following tests are used in evaluating corrosivity of the soil: resistivity, pH, redox potential, sulfides, and moisture.

Experience with existing installations. The best information on soil corrosivity with respect to ductile-iron pipe results from experience with this material in the area under investigation. Every effort should be made to acquire these data by questioning local officials and, if possible, by observing existing installations. Soil-Test Evaluation When the soil-test procedures described in this standard are employed, the following tests are used in evaluating corrosivity of the soil: resistivity, pH, redox potential, sulfides, and moisture.

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