Corrosion coatings are the primary, and sometimes only line of defense against corrosion for sections of pipelines that are put in place using Horizontal directional drilling (HDD). These sections of pipe are often installed in areas that are inaccessible by traditional means. Often the pipe is pulled in beneath highways, railroads, buildings, and bodies of water. These are all sensitive areas and have a high consequence when failures occur. Because they are inaccessible the pipe must be rated and the installation must last for the entire design life of the pipeline since repairs are virtually impossible. Field applied coatings have been developed to meet the properties required to withstand the harsh soil conditions seen in HDD pipeline installation. Protection of these coatings is a critical component required for successful HDD installations. By preventing coating failures we can prevent the costly need to re-pull the pipe. This paper will discuss some of the technical properties required in the ISO-21809-3 and CSA Z245.30-14 for field applied coatings while considering an ARO independent of the anti-corrosion requirements. We will explore properties that are not currently considered in these standards that should be explored in terms of failure mode.
Mitigating Damage On Inaccessible Pipeline Installations
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