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Title: Insertion Of Plastic Pipe In Live Gas Mains
Author: Glenn K. Dippon
Source: American Gas Association 1974
Year Published: 1974
Abstract: Our gas distribution system dates back to the 1890s in some of our areas and includes cast iron pipe that was installed from the 1890s to the 1940s. We have bare steel pipe installed from the 1920s to the 1940s and coated and wrapped steel pipe installed in the 1930s to the present time. In 1970 we had 7,268 miles of distribution main 5.5% was cast iron, 11.3% wrought iron and bare steel and 83.2% coated and wrapped steel. Most of our cast iron system is on low pressure and most of our coated and wrapped steel system is on what we call medium pressure, between 10 and 60 psi.

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