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ISO 21457 Materials Selection And Corrosion Control For Oil And Pdf


ISO 21457 Materials Selection and Corrosion Control for Oil and Gas Production Systems




Oil and gas production systems are exposed to various corrosive environments, such as sour gas, carbon dioxide, seawater, and oxygen. Corrosion can cause material degradation, failure, and leakage, which can result in safety hazards, environmental damage, and economic losses. Therefore, it is essential to select appropriate materials and apply effective corrosion control measures for oil and gas production systems.


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ISO 21457 is an international standard that provides general requirements and guidelines for materials selection and corrosion control for oil and gas production systems. It covers all equipment from and including the well head, to and including pipelines for stabilized products. It does not apply to downhole components. It was published in 2010 by the International Organization for Standardization (ISO), which is a worldwide federation of national standards bodies. ISO 21457 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures for petroleum, petrochemical and natural gas industries.


Objectives and Scope of ISO 21457




The main objective of ISO 21457 is to provide general requirements with guidelines for the selection of materials for systems and components, with due consideration to the transported fluids and the external environment. It also aims to enable product suppliers to develop, manufacture and provide off-the-shelf equipment that meets these requirements.


ISO 21457 identifies the corrosion mechanisms and parameters for evaluation when performing selection of materials for pipelines, piping and equipment related to transport and processing of hydrocarbon production, including utility and injection systems. It also gives guidance for the following:



  • corrosion evaluations;



  • materials selection for specific applications, or systems, or both;



  • performance limitations for specific materials;



  • corrosion control.




ISO 21457 refers to materials that are generally available, with properties that are known and documented. It also allows other materials to be evaluated and qualified for use. It does not provide detailed material requirements or guidelines for manufacturing and testing of equipment. Such information can be found in particular product and manufacturing standards.


Structure and Content of ISO 21457




ISO 21457 consists of the following sections:



  • Scope



  • Normative references



  • Terms, definitions and abbreviated terms



  • Design information for materials selection



  • Materials selection report



  • General guidelines for corrosion evaluations and materials selection




The scope section defines the application range of the standard. The normative references section lists the standards that are indispensable for the application of ISO 21457. The terms, definitions and abbreviated terms section provides the definitions of key terms used in the standard. The design information for materials selection section specifies the information that should be available for performing materials selection. The materials selection report section describes the content and format of the report that documents the materials selection process and results. The general guidelines for corrosion evaluations and materials selection section provides the main technical content of the standard, which includes the following subsections:



  • General: This subsection outlines the general principles and considerations for corrosion evaluations and materials selection.



  • Internal corrosion in oil and gas production and processing: This subsection covers the corrosion mechanisms, evaluation methods, materials selection criteria, performance limitations, corrosion monitoring, mitigation methods, inspection methods, failure analysis methods, and documentation requirements for internal corrosion in oil and gas production and processing systems.



  • Internal corrosion in injection systems: This subsection covers the same topics as above but for internal corrosion in injection systems.



  • Internal corrosion in utility systems: This subsection covers the same topics as above but for internal corrosion in utility systems.



  • Sand erosion: This subsection covers the erosion mechanisms, evaluation methods, materials selection criteria, performance limitations, erosion monitoring, mitigation methods, inspection methods, failure analysis methods, and documentation requirements for sand erosion in oil and gas production systems.



  • External corrosion: This subsection covers the corrosion mechanisms, evaluation methods, materials selection criteria, performance limitations, corrosion monitoring, mitigation methods, inspection methods, failure analysis methods, and documentation requirements for external corrosion in oil and gas production systems.



  • Polymeric materials: This subsection covers the general properties, selection criteria, performance limitations, degradation mechanisms, testing methods, and documentation requirements for polymeric materials in oil and gas production systems.




Benefits and Challenges of ISO 21457




ISO 21457 provides a comprehensive and consistent framework for materials selection and corrosion control for oil and gas production systems. It can help to achieve the following benefits:



  • Improve the reliability, safety, and performance of oil and gas production systems;



  • Reduce the risk of material failure, leakage, and environmental impact;



  • Optimize the life cycle cost and efficiency of oil and gas production systems;



  • Facilitate the communication and collaboration among different stakeholders involved in materials selection and corrosion control;



  • Enhance the quality and transparency of materials selection and corrosion control documentation;



  • Harmonize the materials selection and corrosion control practices across different regions and sectors.




However, ISO 21457 also poses some challenges for its implementation and application, such as:



  • The need for adequate data, information, and expertise to perform corrosion evaluations and materials selection;



  • The need for regular updates and revisions to reflect the latest developments and innovations in materials and corrosion technologies;



  • The need for alignment and integration with other relevant standards and regulations;



  • The need for training and education to raise the awareness and competence of the personnel involved in materials selection and corrosion control.




Conclusion




ISO 21457 is an international standard that provides general requirements and guidelines for materials selection and corrosion control for oil and gas production systems. It covers all equipment from and including the well head, to and including pipelines for stabilized products. It does not apply to downhole components. It was published in 2010 by ISO. It identifies the corrosion mechanisms and parameters for evaluation when performing selection of materials for pipelines, piping and equipment related to transport and processing of hydrocarbon production, including utility and injection systems. It also gives guidance for corrosion evaluations, materials selection for specific applications or systems or both, performance limitations for specific materials, and corrosion control. ISO 21457 can help to improve the reliability, safety, performance, cost, efficiency, communication, quality, transparency, and harmonization of oil and gas production systems. However, it also requires adequate data, information, expertise, updates, revisions, alignment, integration, training, and education to implement and apply effectively.


If you want to learn more about ISO 21457 or download a PDF version of the standard, you can visit the official website of ISO or click here.


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