NDLI: Integrity of 3LPE Pipeline Coatings: Residual Stresses and Adhesion Degradation

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Benjamin, T. A. Chang Sue, Hung-Jue Jiang, Han Browning, Bobby Wong, Dennis Pham, Ha Guo, Shu Kehr, Al Mallozzi, Meghan Snider, William Siegmund, Al
Copyright Year	2008
Abstract	Both fusion bonded epoxy (FBE) and 3-layer polyolefin (3LPO) coating systems have been widely applied in the world as new-construction external pipeline coatings. 3LPO is regarded as a more damage resistant coating system while FBE is considered to be more compatible with the CP system. In the past few years, several incidences of coating disbondment at the FBE-steel interface of 3LPO have been reported in the literature. The coating disbondment issue has raised concerns over the use of 3LPO. The US Department of Transportation (DOT) initiated a research program to address these technical concerns. Our research program is funded by this DOT initiative with a team of pipeline coating experts participating in this research project. The integrity of the 3LPO pipeline coating is impacted by the residual stresses and adhesion degradation by water penetration. This paper examines the effect of coating thickness on residual stress, degradation of adhesion due to immersion in hot water and their combined affect on disbondment. The integrity of 3LPO is good when the coating is applied properly. Under the following conditions, the 3LPO may delaminate: (1) inadequate FBE coating formulation, (2) inadequate FBE coating application procedure and surface preparation, and (3) induced stress due to high volume shrinkage of PO layer.
Sponsorship	International Petroleum Technology Institute and the Pipeline Division
Starting Page	75
Ending Page	86
Page Count	12
File Format	PDF
ISBN	9780791848586
DOI	10.1115/IPC2008-64048
e-ISBN	9780791838358
Volume Number	2008 7th International Pipeline Conference, Volume 2
Conference Proceedings	2008 7th International Pipeline Conference
Language	English
Publisher Date	2008-09-29
Publisher Place	Calgary, Alberta, Canada
Access Restriction	Subscribed
Subject Keyword	Epoxy adhesives Water Construction Pipelines Shrinkage (materials) Residual stresses Coatings Steel Adhesion Transportation systems Stress Hot water Epoxy resins Surface preparation Teams Damage
Content Type	Text
Resource Type	Article

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Nano-Technology for Improved Dual Layer Performance

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Development of a Low Application Temperature FBE Coating

In-Field Production of a New Metallic Composite Pipeline

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Integrity of 3LPE Pipeline Coatings: Residual Stresses and Adhesion Degradation

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