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Selection of Coating Systems for CUI Service

Selection of Coating Systems for CUI Service
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This paper will discuss issues related to corrosion protection of high temperature carbon steel substrates which are insulated to preserve energy, provide process control and to keep workers safe from burn injuries. 

Product Number: 41213-769-SG
Author: Steve Melsom & Joe Welsh
Publication Date: 2013
Industries: Coatings , Corrosion Monitoring and Control
$0.00
$20.00
$20.00

This paper will discuss issues related to corrosion protection of high temperature carbon steel substrates which are insulated to preserve energy, provide process control and to keep workers safe from burn injuries. Corrosion under insulation (CUI) is a serious problem for many owners who have insulated service, where severe corrosion often occurs which can cause plant or process shutdowns, environmental damages and potential injuries to workers. A review of past and current technologies for preventing CUI will be presented. The initial and long-term costs, performance characteristics, expected service life as well as ease of application and repair of coatings used under insulation will be discussed. Field and laboratory performance experience obtained from users, third party laboratories, and vendors of the various coating systems are used for this comparison. It is this long-term cost which determines the true value to the user of any CUI coating system. Local and overall risks associated with perforations are also of major concern. The two along with several other factors are important in coating selection process.

This paper will discuss issues related to corrosion protection of high temperature carbon steel substrates which are insulated to preserve energy, provide process control and to keep workers safe from burn injuries. Corrosion under insulation (CUI) is a serious problem for many owners who have insulated service, where severe corrosion often occurs which can cause plant or process shutdowns, environmental damages and potential injuries to workers. A review of past and current technologies for preventing CUI will be presented. The initial and long-term costs, performance characteristics, expected service life as well as ease of application and repair of coatings used under insulation will be discussed. Field and laboratory performance experience obtained from users, third party laboratories, and vendors of the various coating systems are used for this comparison. It is this long-term cost which determines the true value to the user of any CUI coating system. Local and overall risks associated with perforations are also of major concern. The two along with several other factors are important in coating selection process.

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Corrosion under Insulation (CUI) is accelerated corrosion that takes place under insulation typically used to conserve energy, help with process control, and protect workers from temperature extremes. CUI is an issue for facility owners in many industries that use heat or cold in their industrial processes, including chemical processing, refining, fertilizer manufacturing, and power generation. Insulation used in these applications is generally mechanically attached to the substrate vessel or pipeline and is typically covered with cladding. Cladding is typically made out of metal or plastic and is applied to protect the insulation from physical damage and to keep water away from the insulation and substrate.
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