EAP Conference 2021

EAP-CONFERENCE-1

DETERMINING PIPELINE ASSET INTEGRITY VIA COMPREHENSIVE CATHODIC PROTECTION CLOSE INTERVAL POTENTIAL SURVEY DATA ANALYSIS .

Ahmad Shamiri Bin Wahab

Mach3 Engineering Sdn Bhd

No. 19-A, Jalan Tiara 3, Taman Perindustrian Sime UEP

47600 Subang Jaya

Malaysia

Michelle Lau

Mach3 Engineering Sdn Bhd

No. 19-A, Jalan Tiara 3, Taman Perindustrian Sime UEP

47600 Subang Jaya

Malaysia

ABSTRACT

Cathodic Protection System is a proven technique to protect cross country pipelines against the onset of corrosion, if it has been well designed and undergoes scheduled preventive maintenance.

A very powerful, yet important survey technique in determining the effectiveness of cathodic protection system is the Close Interval Potential Survey (CIPS).  CIPS will not only determine the asset’s cathodic protection level, at the same time it provides aspects of the overall pipeline asset integrity. One of the most common mistakes in evaluating and analyzing CIPS data is when the data is only utilized to determine if the protection criterion of -850mV (wrt to Cu/CuSO4 reference electrode) has been met, without even considering any others external surrounding facilities nor systems.

Comprehensive CIPS analysis provides very useful information in terms of underground pipeline coating integrity, the anode groundbed throwing power, indications of early signs of DC or AC interference, the related discharge and pick-up points from stray current and any electrically isolated areas, etc. This paper will discuss data obtained from an actual project case study, where the Owner is utilizing this newly discovered data and information to embark in the next stage of the pipeline’s integrity programme.

Keywords:  Asset Integrity, Cross Country Pipeline, Cathodic Protection, Close Interval Potential Survey, AC Interference, DC Interference.

Leave a Reply

Your email address will not be published.

error: Content is protected !!