Tank Bottoms
Reinforced Concrete
Flue Gas Desulfurization (FGD) Scrubbers
Pipelines
Remote Monitoring
Coupon Monitoring
Marine Structures
Digesters
Sulfuric Acid Tanks & Piping
Correng Consulting Service
www.correng.com
 
Search Corrosion Service:
 
 
Home >> Systems >> Pipelines
 
 
Corrosion Service offers an extensive array of services for monitoring and mitigating corrosion on pipelines. Our expertise and services cover the entire range of requirements for pipeline corrosion prevention from a minimal test post survey of corrosion potentials through interrupted and tellurically compensated Close Interval Survey to the most comprehensive External Corrosion Direct Assessment (ECDA) survey. We also provide complete diagnostic testing and analysis services to tackle the most complex interference and design problems.

 


Pipe Excavation Pursuant to
Corrosion Survey
 
Our staff of experienced, NACE certificated engineers provide design services for new or existing pipelines using state of the art computer software. Proprietary programs are employed to calculate designs for cathodic protection and AC mitigation and to analyze data for tellurically compensated or ECDA surveys.
 
Deep Well Junction Box Rectifier Inspection
 
We offer the following types of design and analysis services:
 
  • Test Post Survey
  • Close Interval Potential (CIP) Interrupted Survey
  • Direct Current Voltage Gradient (DCVG) Survey & Analysis
  • External Corrosion Direct Assessment (ECDA) Survey & Analysis
  • AC and/or DC Interference Mitigation Survey, Analysis & Design
  • AC and/or DC Mitigation Design for New Pipelines
  • Diagnostic Testing and Remedial Design
  • Installation Services for Deepwell, Semi-Deepwell or Distributed Ground Beds
  • Commissioning and Final Survey
Related Documents:
Telluric Current Effects on Corrosion & Corrosion Control Systems on Pipelines in Cold Climates
 
Date : Feb-01
Author : R.A. Gummow
Notes : NACE N.W. Area Conf. (Anchorage)
 
The impact of telluric current activity on the corrosion control systems on pipelines in northern regions and cold climates is examined. Three specific areas of concern are identified. These factors are; corrosion of the pipe during positive cycles of the telluric disturbances, accurate measurement of cathodic protection performance parameters, and coating damage during the negative cycles of the telluric activity. Corrosion rates are calculated versus the magnitude of the pipe potential change caused by discharging telluric current for different values of the Kp geomagnetic index. Methods of compensating and mitigating telluric current effects are discussed in the context of cathodic protection design and monitoring procedures. The benefits of using potential controlled rectifiers and integrated reference/coupons in mitigating telluric current effects are illustrated.
Practical Telluric Compensation for Pipeline Close Interval Survey
 
Date : Mar-00
Author : T. Place/O. Sneath
Notes : NACE Corrosion 2000
 
Transient phenomena can significantly affect the accuracy of pipe-to-soil potential (PSP) measurements. One pipeline operator has developed a simple method to improve the accuracy of cathodic protection close interval survey (CIS) measurements through the use of continuous dataloggers at reference locations within the survey area.
Results From An ECDA Plan
 
Author : R. Reid / S. Segall
Date : Apr-05
Notes : NACE Corrosion 2005, Paper No.05184, Houston, TX
 
Under an Integrity Management Program (IMP) for natural gas transmission lines, the ECDA concept was analyzed and the process was validated from 2002 to 2004. A plan was developed and implemented in 2004 on one 17 km pipeline and segments of two other pipelines. This paper covers the Request for Proposal (RFP) methodology, the selection of a service provider, the execution plan and the results obtained.
Use of an Integrated CIPS/DCVG Survey in the ECDA Process
 
Author : S.M Segall, R.A. Gummow and R. Reid
Date : Mar-06
Notes : NACE Corrosion 2006, Paper No.06193, San Diego, CA
 
The paper describes the theoretical and practical aspects of merging two indirect inspection tools (i.e. Close Interval Potential Survey and DC Voltage Gradient) in one integrated survey, as used in 2004 during an ECDA project covering more than 21 km of gas pipelines in Southern Ontario.A method was developed and verified in the field to calculate the %IR at coating defects using the recorded data, with no need to interrupt the survey or to return to the defect location in order to measure the total gradient to remote earth.The data processing was improved by deriving the longitudinal gradient profile from the Close Interval Potential Survey data. This enhancement will be used in future surveys to validate indications, in conjunction with the measured lateral gradient data.
 
ECDA Pipeline Integrity Evaluation Technique (5018)