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51316-7803-Materials Selection and Corrosion Mitigation for Offshore Pipeline System

Picture for Materials Selection and Corrosion Mitigation for Offshore Pipeline System
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Product Number: 51316-7803-SG
ISBN: 7803 2016 CP
Author: Shuangqi Song
Publication Date: 2016
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One of the most important steps to ensure the integrity of the offshore pipeline and subsea system is materials selection with properly designed corrosion mitigation strategy. This paper presents a systematic method of corrosion prediction materials selection and corrosion management plan during offshore pipeline system design which includes production flowline water injection line gas lift line MEG injection line jumper and subsea equipment piping. Carbon steel is typically the first option considered for these structures due to its low cost and variable grades meeting mechanical design requirements and it has been widely used in oil and gas industry. However carbon steel production systems with demanding operating requirements (e.g. higher temperature and pressure) when exposed to corrosive substances (e.g. CO2 H2S organic acids) during the lifetime may have their integrity threatened. To mitigate such threats strategies including the corrosion allowance chemical inhibition and/or using alternative material options (e.g. corrosion resistant alloys flexible pipes internal/external coating etc.) for offshore pipeline systems and subsea equipment will be discussed in the paper. A systematic materials compatibility study for an offshore production system will also be reported.
One of the most important steps to ensure the integrity of the offshore pipeline and subsea system is materials selection with properly designed corrosion mitigation strategy. This paper presents a systematic method of corrosion prediction materials selection and corrosion management plan during offshore pipeline system design which includes production flowline water injection line gas lift line MEG injection line jumper and subsea equipment piping. Carbon steel is typically the first option considered for these structures due to its low cost and variable grades meeting mechanical design requirements and it has been widely used in oil and gas industry. However carbon steel production systems with demanding operating requirements (e.g. higher temperature and pressure) when exposed to corrosive substances (e.g. CO2 H2S organic acids) during the lifetime may have their integrity threatened. To mitigate such threats strategies including the corrosion allowance chemical inhibition and/or using alternative material options (e.g. corrosion resistant alloys flexible pipes internal/external coating etc.) for offshore pipeline systems and subsea equipment will be discussed in the paper. A systematic materials compatibility study for an offshore production system will also be reported.
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