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High Performance Solutions for the Mitigation or Elimination of Corrosion Under Insulation (CUI)

Picture for High Performance Solutions for the Mitigation or Elimination of Corrosion Under Insulation (CUI)
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Corrosion under insulation represents a real threat not just to the assets used in heavy industry / Oil & Gas but also to life. This has been demonstrated through the years with millions of dollars of lost assets/production and unfortunately injuries and deaths. For this reason there have been many documents which have providing guidance not only for design of equipment against CUI but also the pre-qualification/testing of coating systems.

Product Number: MECC23-20243-SG
Author: Neil Wilds
Publication Date: 2023
$20.00
$20.00
$20.00

Corrosion under insulation (CUI), is still a critical threat to Oil & Gas and the process industries and requires coatings solutions which will not only look at the protection of steel under traditional insulation systems such as mineral wool and calcium silicate but also give an alternative to traditional insulation systems which could eliminate the conditions leading to CUI. This paper will firstly review details of performance testing of micaceous iron oxide, MIO, enhanced epoxy and inorganic technologies. Testing is centered around a fabrication to field approach looking at not only CUI simulation tests but ambient curing cyclic corrosion tests required for transportation of bulk items for Global projects. The paper will then move onto the other potential solution of CUI i.e. removing the insulation system and replacing it with a thermal insulation coating (TIC). Sherwin-Williams has developed a new TIC coating which can be applied in one coat instead of the current multiple coat system greatly reducing labour costs. This coating, a next generation waterborne TIC has low thermal conductivity and is designed to provide protection from surface contact burns via a single coat application. The coating insulates high temperature processes and lowers the surface temperature of the process vessels or pipes. Additionally, this product reduces solar radiant heat gain, a significant contribution of unwanted temperature increases in high solar exposure environments, thereby keeping commodities’ temperatures from rising too high. These two new technology platforms gives a unique opportunity to tackle CUI from two directions giving the customer alternative solutions to their CUI mitigation and elimination strategies.

Corrosion under insulation (CUI), is still a critical threat to Oil & Gas and the process industries and requires coatings solutions which will not only look at the protection of steel under traditional insulation systems such as mineral wool and calcium silicate but also give an alternative to traditional insulation systems which could eliminate the conditions leading to CUI. This paper will firstly review details of performance testing of micaceous iron oxide, MIO, enhanced epoxy and inorganic technologies. Testing is centered around a fabrication to field approach looking at not only CUI simulation tests but ambient curing cyclic corrosion tests required for transportation of bulk items for Global projects. The paper will then move onto the other potential solution of CUI i.e. removing the insulation system and replacing it with a thermal insulation coating (TIC). Sherwin-Williams has developed a new TIC coating which can be applied in one coat instead of the current multiple coat system greatly reducing labour costs. This coating, a next generation waterborne TIC has low thermal conductivity and is designed to provide protection from surface contact burns via a single coat application. The coating insulates high temperature processes and lowers the surface temperature of the process vessels or pipes. Additionally, this product reduces solar radiant heat gain, a significant contribution of unwanted temperature increases in high solar exposure environments, thereby keeping commodities’ temperatures from rising too high. These two new technology platforms gives a unique opportunity to tackle CUI from two directions giving the customer alternative solutions to their CUI mitigation and elimination strategies.

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