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51314-4167-Development and Application of a New Solution for Mitigation of Carrier Pipe Corrosion Inside Cased Pipeline Crossings

Picture for Development and Application of a New Solution for Mitigation of Carrier Pipe Corrosion Inside Cased
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Product Number: 51314-4167-SG
ISBN: 4167 2014 CP
Author: Len Krissa
Publication Date: 2014
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Len J. KrissaEnbridge Pipelines Inc.Senior Integrity Engineer10201 Jasper AvenueEdmonton AB T5J 3N7Jerry DewittEnbridge Pipelines Inc.Senior Cathodic Protection Specialist1500 West Main St.Griffith IN 46319Tim WhitedCortec CorporationDirector of Engineering & Field Services4119 White Bear ParkwaySt. Paul MN 55110Increasing emphasis is being placed upon control of carrier pipe corrosion inside cased pipeline crossings from both an operator and regulatory perspective. Inline inspection associated with pipeline integrity management programs has identified external carrier pipe corrosion inside casings. Many factors contribute to this corrosion concern. Systems designed to proactively mitigate corrosion inside cased crossings were not readily available.The desire for a proactive carrier pipe corrosion control system led a pipeline operator and a company expert in the manufacture and application of volatile corrosion inhibitor (VCI) chemistry to consider an ideal corrosion mitigation solution. This effort resulted in the development of a unique product designed to fill the annular space of a casing with a gelatinous product that proactively controls carrier pipe corrosion plus prevents intrusion of water etc. into the annular space.The gel filler has been applied inside cased crossings since late 2011. Electrical resistance (ER) probes have been installed through the casing vents and submerged in the filler to the carrier pipe surface. The probes are monitored remotely with automated technology. The corrosion rate data validates the effectiveness of the VCI filler. This new corrosion control solution produces an excellent opportunity to enhance the integrity of pipelines inside cased crossings.Key words: carrier pipe cased pipelines volatile corrosion inhibitors VCI electrical resistance (ER) probes 
Len J. KrissaEnbridge Pipelines Inc.Senior Integrity Engineer10201 Jasper AvenueEdmonton AB T5J 3N7Jerry DewittEnbridge Pipelines Inc.Senior Cathodic Protection Specialist1500 West Main St.Griffith IN 46319Tim WhitedCortec CorporationDirector of Engineering & Field Services4119 White Bear ParkwaySt. Paul MN 55110Increasing emphasis is being placed upon control of carrier pipe corrosion inside cased pipeline crossings from both an operator and regulatory perspective. Inline inspection associated with pipeline integrity management programs has identified external carrier pipe corrosion inside casings. Many factors contribute to this corrosion concern. Systems designed to proactively mitigate corrosion inside cased crossings were not readily available.The desire for a proactive carrier pipe corrosion control system led a pipeline operator and a company expert in the manufacture and application of volatile corrosion inhibitor (VCI) chemistry to consider an ideal corrosion mitigation solution. This effort resulted in the development of a unique product designed to fill the annular space of a casing with a gelatinous product that proactively controls carrier pipe corrosion plus prevents intrusion of water etc. into the annular space.The gel filler has been applied inside cased crossings since late 2011. Electrical resistance (ER) probes have been installed through the casing vents and submerged in the filler to the carrier pipe surface. The probes are monitored remotely with automated technology. The corrosion rate data validates the effectiveness of the VCI filler. This new corrosion control solution produces an excellent opportunity to enhance the integrity of pipelines inside cased crossings.Key words: carrier pipe cased pipelines volatile corrosion inhibitors VCI electrical resistance (ER) probes 
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At rail crossings and parallelisms, pipes for liquid and gas transportation shall be encased in a coated steel casing pipe. Laboratory tests investigate the protection and interference condition of carrier pipe and the casing where water is in the annulus.
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