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首页> 美国政府科技报告 >Test and Evaluation of a Service Connection Method for Low-Pressure CIP LinedMains. Topical Report, April 1996-June 1997
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Test and Evaluation of a Service Connection Method for Low-Pressure CIP LinedMains. Topical Report, April 1996-June 1997

机译：低压CIp衬里主体服务连接方法的测试与评估。专题报告，1996年4月至1997年6月

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摘要

The U.S. gas distribution industry is looking for cost effective techniques toextend the useful life of buried gas services and save substantial rehabitation costs. Cured-in-place liners developed in Europe and Japan have the potential to meet these objectives. One concern slowing the acceptance of CIP technology by U.S. gas utilities is potential for tracking or the migration of gas between the CIP liner and the existing pipe wall when the CIP liner is not perfectly bonded to the pipe wall creating a space for gas to migrate. Tracking requires an entry point for the gas into a disbonded area. Cutting a hole in the liner to tie-in an existing or new gas service is a potential entry point for gas. A fitting that prevents tracking at the service connection independent of the quality of adhesion of the liner and pipe wall should increase the use of CIP lining methods. Fitness-for-purpose screening tests, including thermal cycling, have shown that the 'resin sealing method' is effective at preventing tracking at low-presses. The procedure for apply this method, the screening tests, and the test results are given in this report. Other fittings are being tested to meet the high-pressure applications.

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