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Title: Plastic Pipe Service Life Outlook
Author: John H. Frantz
Source: American Gas Association 1984
Year Published: 1984
Abstract: Polyethelene plastic pipe buried as gas distribution main for twelve to eighteen years was tested to determine the effects of aging. The tests performed to measure changes in the properties of the pipe material are reviewed and the lest results are presented. Also, a service life projection based on the stress caused by gas pressure was made using a hydrostatic regression curve. The test results show that medium density polyethylene plastic pipe has not deteriorated in the time it has been in service. The regression curve shows that plastic pipe on the Philadelphia Electric Company gas system should withstand the stress caused by internal pressure over 100 years.

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