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Improving mineral wool CUI performance – next generation

Picture for Improving mineral wool CUI performance – next generation
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Mineral wool has been widely used for several decades as the primary thermal insulation on piping and equipment to save energy, protect personnel, and reduce emissions. The products have been favored because they are non-combustible, cost effective, provide excellent (and reliable) thermal performance and are safe, easy, and efficient to install.

Product Number: 51323-18959-SG
Author: Mikkel Østergaard Hansen, Soeren Nyborg Rasmussen
Publication Date: 2023
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$20.00
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Mineral wool has been widely used for several decades as the primary thermal insulation on piping and equipment. As Corrosion under insulation (CUI) is a key challenge in the heavy industrial segment, it has been a mineral wool industry focus to reduce any effects insulation materials may contribute in relation to corrosion.
An important step forward in the process of improving the material in relation to CUI, is the incorporation of corrosion inhibitors within the insulation. Such inhibitors will be activated in case of water ingress and pro-actively mitigate the effects of CUI.
By screening of a number of corrosion inhibitor mixtures for efficiency in a CUI environment, it has been possible to identify an effective mixture that can work in a CUI environment. It was also possible to find a method to incorporate the inhibitors in the insulation.
Testing to ASTM G189 proved that the mineral wool with inhibitors provides corrosion protection in an accelerated CUI environment. Mineral wool with inhibitors will not prevent CUI but may be used to complement the coating systems where there are initial defects, thereby reducing the risk of premature CUI events.

Mineral wool has been widely used for several decades as the primary thermal insulation on piping and equipment. As Corrosion under insulation (CUI) is a key challenge in the heavy industrial segment, it has been a mineral wool industry focus to reduce any effects insulation materials may contribute in relation to corrosion.
An important step forward in the process of improving the material in relation to CUI, is the incorporation of corrosion inhibitors within the insulation. Such inhibitors will be activated in case of water ingress and pro-actively mitigate the effects of CUI.
By screening of a number of corrosion inhibitor mixtures for efficiency in a CUI environment, it has been possible to identify an effective mixture that can work in a CUI environment. It was also possible to find a method to incorporate the inhibitors in the insulation.
Testing to ASTM G189 proved that the mineral wool with inhibitors provides corrosion protection in an accelerated CUI environment. Mineral wool with inhibitors will not prevent CUI but may be used to complement the coating systems where there are initial defects, thereby reducing the risk of premature CUI events.

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Corrosion Scale And Moisture Assessments – An Improvement To On-Stream Inspections For CUI Management

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CUI (Corrosion under insulation) is among the key damage mechanisms in the process and hydrocarbon industries which results in the localized corrosion (mainly) thereby reducing the service life of the assets (pipes, equipment, etc.) CUI is reportedly known as the reason behind 40-60% of failures in the facility piping whereas small bore piping (i.e., NPS< 4”) are even more sensitive to CUI failures, where up to 81% of reported failures in small-sized piping are known to be from CUI. Monetary spending to inspect and fix CUI-related failures cost 10% of overall maintenance budget in a typical medium-sized oil refinery. CUI risk is influenced by numerous operational and environmental factors which impedes its management in a typical AIM (Asset integrity management) program.
Picture for CUI Mechanism and Prevention
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51315-5757-CUI Mechanism and Prevention

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ISBN: 5757 2015 CP
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Picture for Solution to Corrosion Under Insulation (CUI) with Three Layered CUI Control and CUI Warning Systems
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51314-4079-Solution to Corrosion Under Insulation (CUI) with Three Layered CUI Control and CUI Warning Systems

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Author: Miki Funahashi
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