Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Use GIVING24 at checkout to save 20% on eCourses and books (some exclusions apply)!

ACVG or DCVG - Does it Matter?

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

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.

 

Product Number: 51317--9374-SG
ISBN: 9374 2017 CP
Author: Jim Walton
Publication Date: 2017
Industry: Corrosion Monitoring and Control
$0.00
$20.00
$20.00

With the most recent NPRM that addresses pipeline integrity and indirect inspections there is language that relates to DCVG and ACVG including certain criteria associated with what must be addressed after completing DCVG or ACVG surveys. While generally DCVG and ACVG are categorized as having the abilityof finding coating defects there can be a major difference in the success of the chosen technique depending on the pipeline conditions. There can be a major difference between the two techniques in certain conditions. This paper would point out when and why to use either technique including what the critieria of percent IR and decibal microvolt really mean when conducting these survey techniques.

Key words: Direct, Alternating, ACVG, DCVG, Current, Voltage

With the most recent NPRM that addresses pipeline integrity and indirect inspections there is language that relates to DCVG and ACVG including certain criteria associated with what must be addressed after completing DCVG or ACVG surveys. While generally DCVG and ACVG are categorized as having the abilityof finding coating defects there can be a major difference in the success of the chosen technique depending on the pipeline conditions. There can be a major difference between the two techniques in certain conditions. This paper would point out when and why to use either technique including what the critieria of percent IR and decibal microvolt really mean when conducting these survey techniques.

Key words: Direct, Alternating, ACVG, DCVG, Current, Voltage

Product tags
Also Purchased
Picture for 09132 DCVG – Analysis of Practical Limits and Suggestions for Improvements
Available for download

09132 DCVG – Analysis of Practical Limits and Suggestions for Improvements

Product Number: 51300-09132-SG
ISBN: 09132 2009 CP
Author: Peter-John Stehouwer, Leslie Bortels, Kees Dijkstra
Publication Date: 2009
$20.00
Picture for Improvement to Cathodic Protection Performance using DCVG Prioritization
Available for download

51316-7091-Improvement to Cathodic Protection Performance using DCVG Prioritization

Product Number: 51316-7091-SG
ISBN: 7091 2016 CP
Author: Chukwuma Onuoha
Publication Date: 2016
$20.00

This paper will show improvements in interpretation of direct current voltage gradient % IR and how accurate selection of pipeline coating rehabilitation location based on this concept would lead to improvements in cathodic protection performance. Case studies from previous external corrosion direct assessment digs will be presented.
Picture for Visualizing Results for CIPS & DCVG
Available for download

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
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support