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Title: Evaluating damage to on- and offshore pipelines using data acquired using ILI
Category: Technical papers from the Journal of Pipeline Engineering
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: 2157s
Date of Publication: Mar 1 2009 12:00AM
Price: $25.00 US
Authors: Dr Chris Alexander
Abstract: EVALUATING THE INTEGRITY of pipelines often involves assessing data acquired from an in-line inspection (ILI) run. ILI generates a range of data types, one of which is geometric data from a caliper tool. Once the data are collected, engineers are required to evaluate the relative severity of any indications that might have been found. With recent advances in storage capacity and instrumentation, the resolution of the acquired data is of sufficient magnitude to make relatively accurate assessments of the potential damage that might exist within a given pipeline system.

In this paper a case study is provided that used data collected during an in-line inspection run of a damaged pipeline. The assessments included the development of finite-element models constructed using the geometric ILI data. Integral to the assessments were integration of actual pressure history data that, when used in conjunction with a cumulative damage assessment model, determined the remaining life of the selected anomaly. Additionally, the assessment used prior full-scale experimental data to confirm the accuracy of the models. A systematic approach for evaluating damaged pipelines using ILI caliper tool data is described.


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