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Title: Polyethylene Plastic Pipe Repair
Author: W. T. Clark
Source: American Gas Association 1973
Year Published: 1973
Abstract: Lone Star Gas Companys experience with various types of plastic piping in gas service dates to the early 1950s. Polyethylene plastic was adopted as our standard distribution piping material in 1968. We now have in service over seven million feet of polyethylene mains and over 86,000 polyethylene service lines. The mains range in size from 1 1/4 inches through 6 inches. Most of the service lines are 3/4-inch IPS. Distribution system operating pressures range up to 60 psi. Leaks in plastic piping are most often caused by damage from digging equipment. which can produce verv large openings or can completely sever the pipe. In these cases, gas flow must be controlled by the mosl expedient means availabie. Gas flow from damaged polyethylene pipe can be easily controlled because of the flexibiliiy of the material.

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