Search papers by author:
Search papers by keyword
All Papers

For more information on our technical papers

To Be Presented at NACE Calgary 2019 NW Conference – Remedial Testing and Cathodic Protection Design on a Deep Trenchless Crossing

Published: 20190206 by NACE Northern Area Conference - Calgary 2019
Author(s): Daniel Fingas
Co-Author(s): Len J. Krissa - Enbridge Pipelines Incorporated

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 pipeline was protected by an impressed current system and a test method was developed to estimate the current pick-up along the pipeline from existing rectifiers. Subsequently, a current requirement test was performed to estimate the effectiveness and efficiency of a supplemental groundbed to be installed adjacent to the crossing.

A permanent cathodic protection system including monitoring was designed and installed. Recommendations for identifying this type of deficiency during the construction phase are proposed.

PAPER WILL BE AVAILABLE FOR DOWNLOAD FOLLOWING PRESENTATION ON FEB 6, 2019