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51316-7107-Considerations on The Selection of Protective and Concrete Weight Coatings for Offshore Pipelines

Picture for Considerations on The Selection of Protective and Concrete Weight Coatings for Offshore Pipelines
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This study is focused on description, discussion and analysis of the different technologies available against external corrosion in offshore export pipelines and its suitability for the Venezuelan pipeline offshore projects. Several anti-corrosive protective coatings and concrete weight coating were evaluated.

Product Number: 51316-7107-SG
ISBN: 7107 2016 CP
Author: Carlos Fernandez
Publication Date: 2016
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$20.00
$20.00

Venezuelan new developments in offshore area involves the design and installation of different pipelines platform and subsea equipments. One of these projects is The Dragon-CIGMA Gas Export Pipeline Project with approximately 110 km long and 36-inch diameter subsea gas export pipeline. This line will be the first subsea Gas pipeline operated by PDVSA in offshore conditions at the North East coasts of Venezuela. This pipeline provided many design and construction challenges among these was the selection and application of the anti-corrosion and concrete weight coating systems. This study is focused at the description discussion and analysis of the different technologies available against external corrosion in offshore export pipelines and its suitability for the Venezuelan pipeline offshore projects. Coatings are the primary method of protecting the external surface of metallic pipeline from the corrosive effects of seawater and sediment. Several protective coating systems were evaluated in order to achieve the design requirements established. Concrete weight coating application methods were also evaluated and one method was selected and employed (wrapping method). Due to the large diameter of the pipeline (36-inches) bonding between the concrete weight coating and the corrosion coating was an important concern in order to prevent slippage due to the high lay-tensions imposed on the pipeline during installation. It is important to understand and assume that every project is different and that an in-depth study is needed to ensure the best performance of both the anti-corrosive coating and concrete weight coating selected.

Keywords: Downloadable, Coating Design, Corrosion Subsea Pipeline.

Venezuelan new developments in offshore area involves the design and installation of different pipelines platform and subsea equipments. One of these projects is The Dragon-CIGMA Gas Export Pipeline Project with approximately 110 km long and 36-inch diameter subsea gas export pipeline. This line will be the first subsea Gas pipeline operated by PDVSA in offshore conditions at the North East coasts of Venezuela. This pipeline provided many design and construction challenges among these was the selection and application of the anti-corrosion and concrete weight coating systems. This study is focused at the description discussion and analysis of the different technologies available against external corrosion in offshore export pipelines and its suitability for the Venezuelan pipeline offshore projects. Coatings are the primary method of protecting the external surface of metallic pipeline from the corrosive effects of seawater and sediment. Several protective coating systems were evaluated in order to achieve the design requirements established. Concrete weight coating application methods were also evaluated and one method was selected and employed (wrapping method). Due to the large diameter of the pipeline (36-inches) bonding between the concrete weight coating and the corrosion coating was an important concern in order to prevent slippage due to the high lay-tensions imposed on the pipeline during installation. It is important to understand and assume that every project is different and that an in-depth study is needed to ensure the best performance of both the anti-corrosive coating and concrete weight coating selected.

Keywords: Downloadable, Coating Design, Corrosion Subsea Pipeline.

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