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Title: State-Of-The-Art Fitness-For-Service Investigation For A Natural Gas Pipeline
Author: Frank A. Dauby, Chih-Hung Lee, Gary Vollbrecht
Source: American Gas Association 1993
Year Published: 1993
Abstract: A delta reclamation districts plan to add significant fill on their levee caused great concern for the integrity of a critical PG&E 22-inch (559 mm) gas transmission line which crosses this geologically unstable area. Initially a conventional linear elastic analysis was performed, yielding results significantly above the elastic limit for steel at several locations. Considering the limits of current stress- based codes and the settlement controlled loading conditions, a decision was made to perform a state-ofthe- art fitness-for-service investigation from a strain-based perspective. This paper describes the development and implementation of that investigation process, utilizing the latest technology in pipeline inspection and structural analysis.

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