This powerpoint presentation begins by providing the study objective which was to examine the effects of converting from free chlorine to chloramines on
corrosion of distribution system materials. Methodology included new pipe rig studies (Phase I and II): free chlorine vs. chloramine; Cl<sub>2</sub>:NH<sub>3</sub>-N; stagnation time; and, pH. Existing lead service line studies (Phase III): scale analysis; lead leaching; stagnation time; and, pH. Study conclusions indicate that: the application of chloramines to new lead and copper pipe
generally resulted in less metal leaching; the majority of dissolved lead released within the first six hours of
stagnation; particulate lead is a significant source of lead in coupled
pipe systems and harvested LSL (scaled pipe); no significant difference in lead release from harvested
pipe (significant existing scale) between chlorine and
chloramine; and, scaled pipes from two different locations responded
differently to chloramination. Includes table, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 2 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 28 |
| Published : | 11/01/2009 |
