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Horizontal Directional Drilling In External Pipeline Coating Integrity

Picture for Horizontal Directional Drilling In External Pipeline Coating Integrity
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The purpose of the “Bore Test” is to know the external quality of the coating after the installation of the pipe section, as picture 1. NACE standard “TM-102-2002-SG”1a defines four kinds of coating quality such as: excellent, good, fair and poor. To know the final quality of coating with this procedure. It was used two different electrical tests. DC current test using minimum voltage drop method and, the 3 pole test which is called by the same manufacture of the Multifunction Ground Resistance tester.

Product Number: 51322-17785-SG
Author: Eric Pintueles
Publication Date: 2022
Industries: Cathodic Protection , Corrosion Monitoring and Control , Coatings
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$20.00
$20.00

External coating testing for pipeline directional drilling installations or informally “Bore Test”. It is a very much requested test in Alberta, Canada. The conditions of the installation are severe for the integrity of the external coating. So, a procedure has been developed after the involvement in several projects. This presents the synergies between field data and cathodic protection theories. Two different field tests are presented by using DC and AC power sources furthermore a theoretical calculation but with given field data. Also, it is introduced a specific theory how to get the resistance of the soil. As the results, pipe-to-earth resistance was similar for both field tests and consistent with the theoretical calculation given field resistivity data. Any Horizontal Directional Drilling external pipeline coating integrity evaluation has its own limitations. Such as, site conditions, backfill settle, aboveground survey techniques access, as well as suitable equipment. Bore tests are run in different conditions therefore it is important to understand the engineering theories for these field tests.

External coating testing for pipeline directional drilling installations or informally “Bore Test”. It is a very much requested test in Alberta, Canada. The conditions of the installation are severe for the integrity of the external coating. So, a procedure has been developed after the involvement in several projects. This presents the synergies between field data and cathodic protection theories. Two different field tests are presented by using DC and AC power sources furthermore a theoretical calculation but with given field data. Also, it is introduced a specific theory how to get the resistance of the soil. As the results, pipe-to-earth resistance was similar for both field tests and consistent with the theoretical calculation given field resistivity data. Any Horizontal Directional Drilling external pipeline coating integrity evaluation has its own limitations. Such as, site conditions, backfill settle, aboveground survey techniques access, as well as suitable equipment. Bore tests are run in different conditions therefore it is important to understand the engineering theories for these field tests.

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