Water treatment system and pressure pipe therefor

Details Water treatment system and pressure pipe therefor Water treatment system and pressure pipe therefor

2005-04-27

2008-09-30

Savage, Matthew O (Department: 1797)

Liquid purification or separation

With preliminary chemical manufacture

C210S199000, C210S254000, C210S418000, C138S109000, C138S145000, C138S155000, C138S175000

Reexamination Certificate

active

07429323

ABSTRACT:
A pressure pipe for transporting corrosive material, such as ozonated water, is formed with a pipe joint that is resistant to ozone. An intermediate portion of the pressure pipe is formed from a low-carbon steel cylinder with inner and outer concrete layers and prestressing wire. A stainless steel slip joint member is attached to an end of the low-carbon steel cylinder to facilitate joining adjacent pipe sections. The stainless steel slip joint members resist the corrosive effects of ozone, while the inner concrete layer protects the low-carbon steel cylinders of the intermediate portion. In one aspect of the invention, a water treatment system constructed from pressure pipe as described above is connected as a bypass loop to a primary pipe run from a water source to a treatment plant. Ozone is introduced to water diverted through the bypass loop. The water decomposes prior to being reintroduced back into the primary pipe run.

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William Sleeper and David Henry for Metropolitan Water District of Southern California,Durability Test Results of Construction and Process Materials Exposed to Liquid and Gas Phase Ozone, Paper was presented at The International Ozone Association Pan American Group Conference, Newport Beach, CA, May 5-9, 2001.

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