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)!

51317--9786-Risk Analysis for Assessing AC Corrosion in Trasnmission Pipelines

Picture for Risk Analysis for Assessing AC Corrosion in Trasnmission Pipelines
Available for download

Expansion has increased the risk of AC in pipelines. In this work, calculations of induced AC voltage and current are performed for scenarios involving: HVAC transmission powerline configuration, lateral distance to the transmission pipeline, and parallelism between the transmission lines, soil, and pipeline and coating properties. 

 

Product Number: 51317--9786-SG
ISBN: 9786 2017 CP
Author: Alfonso Garcia Rojas
Publication Date: 2017
Industry: Energy Generation
$0.00
$20.00
$20.00

The development of transport systems fed with AC power hasincreased the risk of AC in transmission pipelines and awareness of pipeline integrity engineers. Several works have proved the detrimental effect of AC current on pipeline safety and corrosion of catholically protected pipelines.AC may be imposed on the pipelines through three different coupling mechanisms resistive coupling capacitive coupling and inductive coupling but the resistive coupling and inductive coupling mechanisms promote AC corrosion during pipeline operation. In resistive coupling the presence of a short circuit in the AC power due to a lighting strike or a steady state current leakage may discharge current on a nearby pipeline increasing the pipe to soil voltage coating stress and likelihood of electric shock hazard at above grade pipeline appurtenance. In inductive coupling the magnetic field produced around the power conductors generates an electrical field along a parallel pipeline inducing a voltage that interferes with the CP system and promote corrosion.On this work calculations of induced AC voltage and AC current are performed for multiple scenarios considering important factors such: HVAC transmission powerline configuration lateral distance to the transmission pipeline and parallelism between the transmission lines soil pipeline and coating properties. In addition a risk analysis is conducted based on sensitivity analysis of the factors uncertainties and probability distributions to identify locations with higher AC corrosion susceptibility.

Keywords: HVAC transmission powerline, AC current, AC voltage, Interference, Propagation, Impedance, parallelism, inductive coupling, sensitivity analysis, corrosion management.

The development of transport systems fed with AC power hasincreased the risk of AC in transmission pipelines and awareness of pipeline integrity engineers. Several works have proved the detrimental effect of AC current on pipeline safety and corrosion of catholically protected pipelines.AC may be imposed on the pipelines through three different coupling mechanisms resistive coupling capacitive coupling and inductive coupling but the resistive coupling and inductive coupling mechanisms promote AC corrosion during pipeline operation. In resistive coupling the presence of a short circuit in the AC power due to a lighting strike or a steady state current leakage may discharge current on a nearby pipeline increasing the pipe to soil voltage coating stress and likelihood of electric shock hazard at above grade pipeline appurtenance. In inductive coupling the magnetic field produced around the power conductors generates an electrical field along a parallel pipeline inducing a voltage that interferes with the CP system and promote corrosion.On this work calculations of induced AC voltage and AC current are performed for multiple scenarios considering important factors such: HVAC transmission powerline configuration lateral distance to the transmission pipeline and parallelism between the transmission lines soil pipeline and coating properties. In addition a risk analysis is conducted based on sensitivity analysis of the factors uncertainties and probability distributions to identify locations with higher AC corrosion susceptibility.

Keywords: HVAC transmission powerline, AC current, AC voltage, Interference, Propagation, Impedance, parallelism, inductive coupling, sensitivity analysis, corrosion management.

Product tags
Also Purchased
Picture for AC Interference Risk Ranking: Case Study
Available for download

51316-7393-AC Interference Risk Ranking: Case Study

Product Number: 51316-7393-SG
ISBN: 7393 2016 CP
Author: Wolfgang Fieltsch
Publication Date: 2016
$20.00
Picture for AC Interference and Mitigation: Heartland Case Study
Available for download

AC Interference and Mitigation: Heartland Case Study

Product Number: 51317--9461-SG
ISBN: 9461 2017 CP
Author: Matthew Lechelt
Publication Date: 2017
$20.00

Challenges associated with coordinating the modelling, design, and installation of an alternating current interference and mitigation systems. The project consisted of a 65 kilometer long double circuit 500 kilovolt (kV) overhead transmission in a heavily congested right-of-way corridor with more than 80 pipelines.
Picture for Researches on AC Corrosion Risk Assessment Criteria for Cathodically Protected Carbon Steel
Available for download

Researches on AC Corrosion Risk Assessment Criteria for Cathodically Protected Carbon Steel

Product Number: 51317--8962-SG
ISBN: 8962 2017 CP
Author: Yanxia Du
Publication Date: 2017
$20.00

Experiments to study the effects of AC interference on cathodic protection (CP). Changes of CP potential and current density under AC interference and AC corrosion rates obtained. Effective CP potential under AC interference analyzed. Interference compared.
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