51316-7832-Comparison of Performance of Different Insulative Coating Systems for Offshore Applications

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Product Number: 51316-7832-SG

ISBN: 7832 2016 CP

Author: Thu Addis

Publication Date: 2016

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There have been many instances of Corrosion Under Insulation (CUI) in the Gulf of Mexico (GoM) and worldwide. On most sites CUI tends to be a medium to long-term phenomenon with the risk of CUI increasing significantly after a 5 to 10 year “holiday period” but can also occur well before this. A lack of appreciation of the impact on the type of insulation used the proper application and maintenance /repair combined with regular testing firewater deluge systems water leaking from poor connections in adjacent pipework severity of the prevailing weather conditions or simply due to the general environment like offshore can often lead to CUI failures earlier than could otherwise have been envisioned. In order to reduce the likelihood of CUI under traditional typical types of insulation proper insulative coatings can be used instead where applicable.The objective of this study was to compare five different insulative coating systems applied to several test panels to determine which system/s are most suitable for use in GoM offshore applications. These systems were applied according to manufacturers’ procedures on similar panels applied by the same applicator on the same day. The systems were evaluated in a third party independent laboratory to determine their performance. The objective was addressed by performing the following tests on various selected insulating coatings; temperature reduction tests the corrosion mitigation properties the impact and adhesion resistance test moisture permeability ease of application ability to inspect metal substrate under coating and the thermal cracking resistance.The testing procedures developed and test results are discussed in this paper.Key words: Corrosion under insulation; Insulative coating