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Experimental Evaluation of Water Transport Through Insulation

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A simple set-up and methodology was developed to semi-quantitatively measure water transport (liquid and vapor) through intact insulation and damaged insulation when a thermal gradient across the insulation is maintained. The main objective was to contribute to a better understanding of water transport mechanism in different insulation materials which can be related to corrosion under insulation (CUI). Most tests were conducted using polyurethane insulation and for comparison purposes few tests were conducted with mineral wool insulation.Results from this study indicated different time scales for the following main processes affecting the moisture content at the metal/insulation interface which illustrated a potentially effective approach for CUI mitigation:<ul><li>Water transport from the environment to the metal surface through intact insulation.</li><li>Water transport from the environment to the metal surface through damaged insulation.</li><li>Water transport out of the metal surface through the insulation. 

Product Number: 51319-13477-SG
Author: Jose Vera
Publication Date: 2019
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$20.00
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Picture for Factors for Selecting Thermal Insulation Materials to Prevent Corrosion Under Insulation
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Factors for Selecting Thermal Insulation Materials to Prevent Corrosion Under Insulation

Product Number: 51319-12952-SG
Author: Kentaro Mizushima
Publication Date: 2019
$20.00

Many types of thermal insulation materials are used in oil and gas plant facilities. Recently new materials have been developed to prevent corrosion under insulation (CUI) and even the conventional materials have been improved their properties to provide better protection.When designing a plant measures to prevent CUI are studied when verifying the materials of construction determining the protective coatings systems and selecting thermal insulation and jacketing materials. Measures to prevent CUI should not be considered separately for these but rather together as a total system. Recently though while protective coatings have been studied by users coating manufacturers and independent organizations such as testing laboratories engineering firms and consultants there has been little investigation of the ability of thermal insulation materials themselves to prevent CUI.In this study the ability of various thermal insulation materials to prevent CUI in a simulated severely corrosive environment were examined. The factors influencing CUI prevention or aggravation were identified based on which it was recommended that these factors be considered when selecting thermal insulation materials during the design of a plant. As a summary of this study experiences of design of plants and related other CUI studies effective ideas relating to protective coatings thermal insulation and jacketing materials for preventing CUI will be shared.
Picture for Understanding Insulation Chemistry Proven to Inhibit Corrosion Under Insulation (CUI)
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Understanding Insulation Chemistry Proven to Inhibit Corrosion Under Insulation (CUI)

Product Number: 51317--8876-SG
ISBN: 8876 2017 CP
Author: David Shong
Publication Date: 2017
$20.00

Since 2002, a corrosion inhibiting chemistry package has been an integral part of two specific industrial insulations. This paper explains, at a molecular level, how this package engages a two-pronged defense (physical coating and pH buffering) against CUI.
Picture for Cyclic CUI Testing of Insulation Materials
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Cyclic CUI Testing of Insulation Materials

Product Number: 51317--8877-SG
ISBN: 8877 2017 CP
Author: Soeren Rasmussen
Publication Date: 2017
$20.00

Via the testing of six generically different insulation materials, the study has tried to identify factors in an insulation material that are more influential on corrosion rates of carbon steel.

 
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