Heat Shrink Sleeve (HSS) coatings technology is based on radiation cross-linking of Polyethylene and Polypropylene sheets in combination with multiple types of adhesive chemistries. Heat Shrink sleeves have been and continue being used for the corrosion protection of Oil, Gas, Water and District Heating pipelines. This paper addresses the laboratory studies of the long term thermal, oxidative and hydrolytic stability of radiation cross-linked polyolefin as used in Heat Shrink Sleeves. Studies are presented on the results of long term heat aging and predicted life expectancy based upon Arrhenius plots. Analysis such as oxidation induction time, dynamical mechanical properties, peel adhesion and physical mechanical testing are discussed as test methods to validate and predict long term stability and projected life expectancy for in-service on operating pipelines.

Subject
Test methods, Coatings, Materials, Piping, Composition, Top coats, Moduli, Field joint coatings, Water immersion, Coating adhesion, Shear, Heat, Samples
Keywords:
Arrhenius, Cathodic Disbondment, Accelerated Thermal Aging, Hot Water Immersion (HWI), Oxidation Induction Time (OIT), Dynamical Mechanical Analysis (DMA), Field Joint Coating (FJC), Polyethylene (PE) and Polypropylene (PP), 2L Cross-linked PE (XPE) and 3L Cross-linked PP (XPP)
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2016
Association for Materials Protection and Performance (AMPP)
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