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51314-3781-Indexing Model for Pipeline Risk Assessment and Corrosion Management

Picture for Indexing Model for Pipeline Risk Assessment and Corrosion Management
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Product Number: 51314-3781-SG
ISBN: 3781 2014 CP
Author: Eugene Ogosi
Publication Date: 2014
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Corrosion remains a significant threat to the integrity and operational availability of pipelines and must be managed effectively and controlled. This can only be achieved through a thorough understanding of the prevalent corrosion mechanisms for each individual pipeline and the cumulative effects on a pipeline system.The paper presents the concept results and benefits of applying an index-scoring model for pipeline corrosion risk assessment and management of a North Sea pipeline network. The paper focuses on how the model which incorporates established corrosion assessment techniques has been used to quantify the threat of corrosion to the Apache North Sea pipelines and lessons learned through implementationEmpirical mechanistic and qualitative models are very important assessment tools used for pipeline service life estimation corrosion rate prediction and probability of Failure (PoF) estimation. A quantitative model will strictly adhere to empirical and/or mechanistic algorithms and will not allow opinion based on engineering judgment or the experience of the assessor. A qualitative model on the other hand implies complete reliance on expert opinion. The authors suggest that a good corrosion risk assessment process should not adhere exclusively to either so propose a semi-quantitative model.The technique described involves a systematic consideration of the effects of various risk increasing and risk reducing factors which can be characterised in specialised spreadsheets or an integrity management database. These factors are characteristics that allow corrosion to occur and/or factors inherent through design or operations that could reduce the probability of failure due to corrosion. These factors are quantified using a consistent weighting system to estimate the probability of failure.The model has proved to be a proactive thorough and consistent approach for identifying and quantifying damage due to corrosion for pipelines.Key words: corrosion management corrosion management system pipeline integrity management corrosion rate prediction index model risk assessment. 
Corrosion remains a significant threat to the integrity and operational availability of pipelines and must be managed effectively and controlled. This can only be achieved through a thorough understanding of the prevalent corrosion mechanisms for each individual pipeline and the cumulative effects on a pipeline system.The paper presents the concept results and benefits of applying an index-scoring model for pipeline corrosion risk assessment and management of a North Sea pipeline network. The paper focuses on how the model which incorporates established corrosion assessment techniques has been used to quantify the threat of corrosion to the Apache North Sea pipelines and lessons learned through implementationEmpirical mechanistic and qualitative models are very important assessment tools used for pipeline service life estimation corrosion rate prediction and probability of Failure (PoF) estimation. A quantitative model will strictly adhere to empirical and/or mechanistic algorithms and will not allow opinion based on engineering judgment or the experience of the assessor. A qualitative model on the other hand implies complete reliance on expert opinion. The authors suggest that a good corrosion risk assessment process should not adhere exclusively to either so propose a semi-quantitative model.The technique described involves a systematic consideration of the effects of various risk increasing and risk reducing factors which can be characterised in specialised spreadsheets or an integrity management database. These factors are characteristics that allow corrosion to occur and/or factors inherent through design or operations that could reduce the probability of failure due to corrosion. These factors are quantified using a consistent weighting system to estimate the probability of failure.The model has proved to be a proactive thorough and consistent approach for identifying and quantifying damage due to corrosion for pipelines.Key words: corrosion management corrosion management system pipeline integrity management corrosion rate prediction index model risk assessment. 
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