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98079 ECONOMIC JUSTIFICATION FOR CATHODIC PROTECTION BASED ON PIG DATA

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Product Number: 51300-98079-SG
ISBN: 98079 1998 CP
Author: Elden Johnson, Timothy Bieri
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Pipeline Cathodic Protection (CP) projects are traditionally implemented to provide hot spot protection where needed based on CP monitoring data and to comply with regulatory criteria. In today’s competitive environment, operating company management additionally demands that proposed CP projects be justified economically. In-1ine corrosion inspection (corrosion pig) data can be used to predict potential future corrosion maintenance that would occur under alternative scenarios, both with and without additional CP. An economic analysis can then be used to determine if expected benefits of proposed CP projects outweigh costs. This paper describes methods used on the Trans Alaska Pipeline System (TAPS) for predicting future corrosion maintenance using in-line inspection data, in addition to CP monitoring data, and evaluating the economic impact of proposed CP projects. An example is presented to illustrate the method used. Keywords: Corrosion pigs, in-line inspection, cathodic protection, corrosion maintenance, maintenance management, corrosion prediction, economic analysis, regulatory compliance.
Pipeline Cathodic Protection (CP) projects are traditionally implemented to provide hot spot protection where needed based on CP monitoring data and to comply with regulatory criteria. In today’s competitive environment, operating company management additionally demands that proposed CP projects be justified economically. In-1ine corrosion inspection (corrosion pig) data can be used to predict potential future corrosion maintenance that would occur under alternative scenarios, both with and without additional CP. An economic analysis can then be used to determine if expected benefits of proposed CP projects outweigh costs. This paper describes methods used on the Trans Alaska Pipeline System (TAPS) for predicting future corrosion maintenance using in-line inspection data, in addition to CP monitoring data, and evaluating the economic impact of proposed CP projects. An example is presented to illustrate the method used. Keywords: Corrosion pigs, in-line inspection, cathodic protection, corrosion maintenance, maintenance management, corrosion prediction, economic analysis, regulatory compliance.
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