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51314-4013-Direct Current Stray Current Interference and Mitigation for a Sacrificial Anode Protection Pipeline

Picture for Direct Current Stray Current Interference and Mitigation for a Sacrificial Anode Protection Pipeline
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Product Number: 51314-4013-SG
ISBN: 4013 2014 CP
Author: Huimin Qin
Publication Date: 2014
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In order to control the corrosion problems of a sub-high-pressure natural gas pipeline suffered dynamic DC stray current interference a series of field testing were conducted including the pipe-to-soil potential soil resistivity the sacrifice anode performance and stray current parameters etc. The test results show that the pipeline is mainly influenced by the the city subway dynamic DC stray current interference flowing in or out the anodes which are used for cathodic protection. Experiments about pre-feasibility studies using forced current drainage method or polarity drainage method were carried out on a 4 km pipeline segment. According to the results of the experimental test section the polarity drainage method was impled on the whole pipeline which improved the pipeline cathodic protection status. Also some pipeline segment which is originally under protection achieves the requirements of the normal protective criteria.
In order to control the corrosion problems of a sub-high-pressure natural gas pipeline suffered dynamic DC stray current interference a series of field testing were conducted including the pipe-to-soil potential soil resistivity the sacrifice anode performance and stray current parameters etc. The test results show that the pipeline is mainly influenced by the the city subway dynamic DC stray current interference flowing in or out the anodes which are used for cathodic protection. Experiments about pre-feasibility studies using forced current drainage method or polarity drainage method were carried out on a 4 km pipeline segment. According to the results of the experimental test section the polarity drainage method was impled on the whole pipeline which improved the pipeline cathodic protection status. Also some pipeline segment which is originally under protection achieves the requirements of the normal protective criteria.
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Concerns related to stray DC interference. Including safety, testing, documentation and lessons learned. Also addressed are DC powered transit systems and other unordinary sources of DC interference.
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51318-11045-Corrosion Behavior of Buried Pipeline under Dynamic DC Stay Current Interference

Product Number: 51318-11045-SG
Author: Huimin Qin / Yanxia Du / Jie Liu / Zhengxiong Liu / Xin He
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For a buried pipeline under dynamic DC stray current interference, field experiments of corrosion coupons were carried out at two selected test stations by burying coupons of different bare areas at two different depths.
Picture for 10102 High Voltage Direct Current Interference with Underground/Underwater Pipelines
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10102 High Voltage Direct Current Interference with Underground/Underwater Pipelines

Product Number: 51300-10102-SG
ISBN: 10102 2010 CP
Author: Peter Nicholson
Publication Date: 2010
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This paper will outline the effect of stray current that originates from an HVDC  transmission system that runs parallel to and crosses a crude oil and natural gas pipeline system.
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