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Picture for Validation of Risk Rating Derived from Hydrogen Permeation Field Data with Ultrasonic Inspection Res
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Validation of Risk Rating Derived from Hydrogen Permeation Field Data with Ultrasonic Inspection Results

Product Number: 51315-5926-SG
ISBN: 5926 2015 CP
Author: Moavin Islam
Publication Date: 2015
$20.00
Picture for Validation Of The Dry Gas Internal Corrosion Direct Assessment Methodology Using In-Line Inspection.
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Validation Of The Dry Gas Internal Corrosion Direct Assessment Methodology Using In-Line Inspection.

Product Number: 51321-16839-SG
Author: James Warner; Kevin O'Reilly
Publication Date: 2021
$20.00
Picture for 97282 Variable Amplitude Galvanostatically
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Variable Amplitude Galvanostatically Modulated Impedance Spectroscopy as a Non-Invasive Tool for Assessing Reactivity at the Corrosion Potential

Product Number: 51300-97282-SG
ISBN: 97282 1997 CP
Author: Paul T. Wojcik, Mark E. Orazem
$20.00
Picture for Variances in Pipeline AC Interference Computational Modelling
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Variances in Pipeline AC Interference Computational Modelling

Product Number: 51319-12985-SG
Author: Gerald Haynes
Publication Date: 2019
$20.00

The AC interference between High Voltage AC (HVAC) power lines and pipelines has been modelled with various software programs all of which have a variety of input data which results in various results and outputs.Important aspects such as the soil resistivity along the pipeline route can have a significant impact on the pipelines coating resistance. This in turn affects both the computed AC voltages and current densities both of which can significantly affect personal safety and corrosion of the pipeline.Therefore the spacing between these field measurements along the pipeline route can have a significant effect on the pipeline integrity. Soil resistivity measurements collected every 1000ft versus every 5280ft (1 mile) can have a dire consequence on the corrosion results and the matter is exacerbated where these soil resistivity measurement values change significantly along the route. The accuracy of the soil resistivity field data relative to the actual routing (wetlands rivers low and high resistivity’s etc.) will also affect the correct placement of the AC Mitigation (grounding) as well as the resistance of the grounding which in turn has a cost implication to the asset owners and/or operators.Other aspects such as the power line LEF/EMF may also be used to “calibrate” the AC Interference especially where load data is absent.This paper addresses the critical importance of collecting adequate data for the AC Interference studies to prevent costly installations and to mitigate the incorrect positioning of AC Mitigation systems due to inadequate information.