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Corrosion Under Insulation on Industrial Piping – A Holistic Approach to Insulation System Design

Picture for Corrosion Under Insulation on Industrial Piping – A Holistic Approach to Insulation System Design
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Corrosion Under Insulation (CUI) on industrial piping is a major issue for oil and gas industry. The potential influence of applied thermal and acoustic insulation materials is normally assessed through a series of individual laboratory tests on the insulation materials themselves but very rarely on the applied system. Moreover the tested physical values do not necessarily and readily reflect the potential influence that a given insulation material or system has on the risk of CUI.A more sophisticated approach is proposed which takes into account not only the applied insulation system but also the CUI failure behaviour and water or water vapour ingress and retention processes. This approach allows the individual risk assessment of the applied insulation systems against different scenarios of water ingress to be performed. Other influencing factors for the risk assessment include the configuration of the insulation system (e.g. insulation materials aluminium barrier foil outside claddings) and specified construction or installation methods.It is hoped that the approach proposed in this paper will enable the reader to improve their knowledge of insulation materials and their influence on CUI risk and furthermore be able to better identify vulnerable areas on the facility where CUI is likely to occur thereby allowing appropriate CUI management strategies to be developed and implemented.

Product Number: 51319-13042-SG
Author: Mark Swift
Publication Date: 2019
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$20.00
$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.
Corrosion Under Insulation (CUI) Management – A Case History
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Corrosion Under Insulation (CUI) Management – A Case History

Product Number: 51219-196-SG
Author: David A. Hunter
Publication Date: 2019
$20.00

Pond investigated pressure vessel tank failures which are causing recurring maintenance of $250,000 per year. This challenging project had limitations of space, operational time pressures/vessel availability requirements, cost and replacement variables. This presentation will chronical problems and discuss best practices of specifications, material selection, surface preparation, and application inspection that would have prevented the aforementioned outcome. This paper discusses the fundamentals of composite coatings, industry accepted design standards for their use, and examples of typical uses for these materials that solve problems in varied industries.
Picture for Performance of Three Types of Coatings in a Simulated Corrosion Under Insulation Condition
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Performance of Three Types of Coatings in a Simulated Corrosion Under Insulation Condition

Product Number: 51317--9296-SG
ISBN: 9296 2017 CP
Author: Junki Miyashita
Publication Date: 2017
$20.00

This paper evaluates the resistances to CUI of three types of coatings under severe CUI conditions using a vertical pipe test method. Certain possible improvements in the test method are also discussed.
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