Hydroxypropyl cellulose (HPC) is a chemical substance with the chemical formula C3H7O that is an ether of cellulose. It presents as a white to light cream powder. It is formed when some of the hydroxyl groups in the successive glucose units have been hydroxypropylated. Hydroxypropyl cellulose is… View Full Term
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Monica Chauviere is a recognized expert in the field of corrosion under insulation (CUI), with more than 30 years’ work with ExxonMobil Baytown Refinery and ExxonMobil Research and Engineering Company. In her current consultancy, Chauviere works with both owner companiesand product providers in the field of non-metallic materials.
Her entire career has focused on refinery fixed equipment, with specialist expertise in non-metallic materials for downstream facilities. Other key areas of expertise include coatings and linings, thermal insulation, and passive fireproofing.
Chauviere remains active in NACE standards development and has served in a range of operational committee roles. As a leading expert in CUI prevention and thermal insulation best practices, she regularly presents at regional and international conferences.
A shop coating is not always better than a field coating. Not all shop coatings are necessarily performed in a controlled environment.
For those with no real-world experience in oil & gas refining environments or with corrosion under insulation (CUI), the white paper, “Selection of Coating Systems for CUI Service” by Christian Zupicich and Michael MeLampy,...
Misconceptions abound regarding corrosion under insulation (CUI). From imperfect coatings and wet insulation dynamics, to design flaws that trap water, the proper management of CUI requires a clear understanding of common thermal and mechanical issues.
It is a myth that if the right coating is put on after excellent surface prep, everything will be fine, regardless of the insulation.
If the jacketing on the insulation is not damaged and nasty-looking for hundreds of feet of piping there is not likely CUI on the steel. Wrong!
There is no such thing as a perfect coating. In this article we explore a common myth of corrosion under insulation.
A review of a 40-year case history at two massive Gulf Coast refinery complexes in the U.S. exposes how drastically water-absorbent insulation impacts corrosion under insulation in the CUI temperature range.
The cost and effort to inspect for and repair corrosion under insulation (CUI) that is routinely discovered on aging equipment is exceedingly high. Obviously, this work is crucial, but the cost remains high due to...
