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Pipeline Coating Corrosion, Understanding Testing and UV Degradation of Fusion Bonded Epoxy Coatings

Picture for Pipeline Coating Corrosion, Understanding Testing and UV Degradation of Fusion Bonded Epoxy Coatings
Available for download
Product Number: 51321-16325-SG
Author: Lake H. Barrett/Robert Leggat
Publication Date: 2021
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$20.00
$20.00

Recently (2019) the Federal Energy Regulatory Commission (FERC) requested information on behalf of a State Department of Health regarding the efficacy and the environmental impact of a pipeline coating utilized to prevent corrosion on the exterior of a steel gas pipeline. This presentation addresses several key considerations and provides testing procedures for pipeline coatings and addresses the effect of weathering. The authors provide firsthand experience with polymer coatings and the effects of UV degradation.Although Fusion Bonded Epoxy Linings have been utilized for exterior corrosion protection of pipe for decades, recent media reports have called into question the viability of this technology when sticks of pipe are stored outdoors and subject to weathering environments. This presentation will address questions raised by FERC and provide a summary of today’s state of the art testing procedures for FBE, to determine the root cause of the “chalking” and provide some practical tips that can minimize the problem.This presentation utilizes a case study approach from actual North American Pipelines as well as qualification and testing protocols to examine the challenges of exterior pipeline corrosion prevention. This paper draws upon the Author’s field and laboratory experience.

Key words:FBE, Chalking, PipeExposure Laboratory Testing

Recently (2019) the Federal Energy Regulatory Commission (FERC) requested information on behalf of a State Department of Health regarding the efficacy and the environmental impact of a pipeline coating utilized to prevent corrosion on the exterior of a steel gas pipeline. This presentation addresses several key considerations and provides testing procedures for pipeline coatings and addresses the effect of weathering. The authors provide firsthand experience with polymer coatings and the effects of UV degradation.Although Fusion Bonded Epoxy Linings have been utilized for exterior corrosion protection of pipe for decades, recent media reports have called into question the viability of this technology when sticks of pipe are stored outdoors and subject to weathering environments. This presentation will address questions raised by FERC and provide a summary of today’s state of the art testing procedures for FBE, to determine the root cause of the “chalking” and provide some practical tips that can minimize the problem.This presentation utilizes a case study approach from actual North American Pipelines as well as qualification and testing protocols to examine the challenges of exterior pipeline corrosion prevention. This paper draws upon the Author’s field and laboratory experience.

Key words:FBE, Chalking, PipeExposure Laboratory Testing

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The selection of a coating for suitable use on the exterior of a pipeline is an important consideration due to the safety and cost consequences of potential corrosion.  Because there are numerous fusion bonded epoxy (FBE) mainline and field joint coating systems available, the selection of the optimum coating system is as much an art as a science. 
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Field And Laboratory Studies On The Effect Of UV Degradation And UV Protector Paints On Stockpiles Of FBE Coated Pipeline

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Fusion bonded epoxy (FBE) is the primary coating used in North America for new pipeline construction and is strongly featured in the Middle East1. Pre-coated FBE pipe is routinely stockpiled and stored in large quantities at several locations close to pipeline right-of-ways. Once stockpiled, most of the pipesremain un-used until an inspection and remediation program is initiated2. Integrity projects purchase FBE coated pipe in advance and stockpile it until it is required. In addition, project delays and left-over pipe from completed projects can cause stockpiling for future use for undetermined periods of time. Under ultraviolet (UV) exposure in the presence of air, photooxidative degradation of FBE coatings occurs due to photometrical reactions arising from UV absorption.
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