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The purpose of this paper is to present a framework for the integrity assessment of unpiggable pipelines, which are subject to internal corrosion. This integrity assessment is done by combining probabilistic flow and corrosion models with risk assessment.
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An alternative method to record the potential shift when performing a coating conductance test outlined in NACE TM0102-021 is proposed. This method utilizes an oscilloscope rather than a digital multimeter to capture the potential shift when performing the applied current method.
Fitness for purpose of low temperature cure liquid-applied coating systems for pipeline maintenance and repair. Potential revisions to incorporate low temperature cure liquid-applied coating products into Table 1 of CSA Z245.30-14 will be presented along with commentary related to the deviations from the standard.
This paper provides comprehensive correlation of inline and aboveground pipeline integrity data geared at ensuring a complete pipeline integrity management program. Case studies are provided to show benefits of inline inspection and direct assessment correlations.
This paper will present a case study, which will outline the challenges and lessons learned with corrosion in a Mine project in Chile where the internal corrosion of the seawater conveyance line caused a number of technical, project schedule and budget impacts during the commissioning stage of the project.
Soured reservoirs contain hydrogen sulfide (H2S) that can prompt the formation of exotic sulfide scales, leading to fouling that negatively affects the production of oil and gas. The paper examines the mode of precipitation and deposition of lead sulfide (PbS) scale on anti-fouling surfaces for application in oilfield systems.
The issue of induced AC current corrosion and its mitigation for buried pipelines continues. A review of the design methods and mitigation technologies used in the past, and those recently developed and continue to evolve, to meet the AC mitigation challenges faced by buried pipeline operators.
Pipeline Enhanced Corrosion Management Analysis (ECMA) was conducted over transmission pipelines that experienced considerable external metal loss after a short time in operation. Pipeline historical and current data, pipe design, construction, soil, corrosion control, monitoring, inspection and operational were reviewed.
Simulation shows that navigation algorithms can guide autonomous vehicles to inspect poles or towers for corrosion, or to inspect enclosed spaces. The algorithms use sensor feature extraction, PID control, dynamic window obstacle avoidance, and genetic algorithm solutions to the traveling-salesman problem.
Longitudinally welded linepipe can be more susceptible to localized corrosion than seamless linepipe due to chemical composition gradients between the weld and base metal, resulting in galvanic attack.
In this study, enamel-coated steel pipe samples with various levels of cathodic protection were tested to investigate their impedance models by electrochemical impedance spectroscopy (EIS).
Some 1,401 underground diesel storage tanks were analyzed for average maximum pit depths over the years 2003 till 2016. The results showed that since the addition of biodiesel the average pit depth increased due to Microbiologically Influenced Corrosion (MIC).