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Picture for 51317-9378-How Deep is too Deep for Indirect Inspections?
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51317-9378-How Deep is too Deep for Indirect Inspections?

Product Number: 51317-9378-SG
Author: Jim Walton
Publication Date: 2017
$20.00

How deep is too deep to run a successful indirect inspection of Horizontally Directionally Drilled (HDD) installed pipelines and still have valid results?  Real world examples of indirection inspections at various depths. Alternate methods for inspection. Suggested indirect inspection criteria.
Picture for Visualizing Results for CIPS & DCVG
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51318-11518-Visualizing Results for CIPS & DCVG

Product Number: 51318-11518-SG
Author: Elizabeth Nicholson
Publication Date: 2018
$20.00

New tools for data acquisition and display for the field surveyor, data analyst and pipeline operator as they affect Close Interval Potential Surveys (CIPS) and Direct Current Voltage Gradient (DCVG) surveys
Picture for A Method for Assessing Facility Pipe Integrity
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A Method for Assessing Facility Pipe Integrity

Product Number: 51317--9524-SG
ISBN: 9524 2017 CP
Author: Daniel Fingas
Publication Date: 2017
$20.00

It was proposed to apply a modified external corrosion direct assessment process to a small station. This paper describes the technical approach which was developed in order to overcome the expected challenges. 

 
Picture for ACVG or DCVG - Does it Matter?
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ACVG or DCVG - Does it Matter?

Product Number: 51317--9374-SG
ISBN: 9374 2017 CP
Author: Jim Walton
Publication Date: 2017
$20.00

This paper will point out when and why to use either Direct Current Voltage Gradient (DCVG) or Alternating Current Voltage Gradient (ACVG) surveys, including what the criteria of percent IR and Decibel microvolt (dBµV) really mean when conducting these survey techniques.

 
Picture for Case Studies on Application of Indirect Inspection Technology and Methodology in Municipal Water and Wastewater Systems
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Case Studies on Application of Indirect Inspection Technology and Methodology in Municipal Water and Wastewater Systems

Product Number: 51324-21056-SG
Author: Vignesh Shankar; Emer Flounders
Publication Date: 2024
$40.00
Indirect inspection surveys have successfully inspected piggable and difficult to pig buried onshore Oil and Gas steel pipelines for decades. Indirect inspection methodologies such as ACVG, DCVG, CIS, GPS, leak detection, and DOC have aided oil and gas pipeline operators to monitor the health of their assets and completing mitigation to ensure their assets are functioning as per design, standards, and code. There has been extensive continuous improvement in monitoring oil and gas pipelines using indirect inspection technology. The water and wastewater pipelines have varying pipe materials. These pipelines are not regulated and do not have extensive literature, and dedicated teams to support maintaining assets in relation to external corrosion prevention, maintenance, and monitoring. This paper focuses on the application of demonstrated indirect inspection technology and methodology in municipal water and wastewater pipelines. The paper will discuss different pipe materials: coated steel pipeline, BWP, and PCCP inspected using indirect inspection technology, and present case studies.
Picture for Case Studies On ECDA and SCCDA
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Case Studies On ECDA and SCCDA

Product Number: 51323-19231-SG
Author: Vignesh Shankar
Publication Date: 2023
$20.00

Pipelines have been considered one of the safest methods of transporting energy from one place to another. This is achieved through a systematically planned, documented, and comprehensive pipeline integrity management (PIM) program. PIM covers areas such as engineering, operations, inspections and maintenance, health and safety, and environment protection.
Picture for Case Study - DC Potential Influence Investigation via Waveform Analysis
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Case Study - DC Potential Influence Investigation via Waveform Analysis

Product Number: 51324-21149-SG
Author: Marc Blouin; Darrell Cornet
Publication Date: 2024
$40.00
While conducting overline surveys including Close Interval Survey (CIS), Alternating Current Voltage Gradient (ACVG), Direct Current Voltage Gradient (DCVG), Alternating Current Current Attenuation (ACCA) and Depth of Cover (DoC) in the Southeast Saskatchewan, Canada, a section of the cross Canada/US border Alliance pipeline, an unexpected CIS potential was encountered whereby potential measurements dipped, falling below the -850mV potential criteria, before rising again back into the range before the drop. The location of the potential drop occurred at a foreign crossing thus stray current was initially suspected. The field crew remained nearby while the foreign crossing owner representatives were notified of a possible interaction requiring further investigation. An interruption and influence analysis plan was put together to determine the nature of the influence on the Alliance DC Potential measurement circuit. This paper summarizes the preliminary analysis and test plan, the field measurements, and results.
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Lessons Learned During 10 Years of ECDA Application

Product Number: 51315-5601-SG
ISBN: 5601 2015 CP
Author: Sorin Segall
Publication Date: 2015
$20.00

This paper summarizes the results of ten years of External Corrosion Direct Assessment (ECDA) application on more than 100 projects and includes a number of important lessons learned during the process.
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