The ability to adequately monitor and protect long, deep trenchless crossings installed in rock is critical to ongoing safe operation of pipelines. This paper is a case study of a long horizontally directionally drilled crossing that was subject to significant coating damage at installation. The […]

Recent close-interval potential surveys have raised concerns about the accuracy of potential measurements on some older pipelines. Two significant sources of error were identified: metallic IR-drops and equalization currents. These resulted in measured on and off potentials which differed by hundreds of millivolts from the […]

In recent years, effective techniques have been developed for conducting integrity assessments along cross-country pipelines.  In order to provide similar confidence in facility integrity, it was proposed to apply a modified external corrosion direct assessment process to a small station.  Until now, congested facility environments […]

When installing pipelines in rocky areas, additional mechanical safeguards may be necessary to protect the coating. These safeguards may take the form of intermittent supports which elevate the pipeline off the trench bottom. As such supports are non-metallic and are installed directly against the pipeline […]