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Hi, we are in the early stages of FEED for a new ammonia storage tank (API625 full containment) and are deliberating over insulation type. We’ve received a technical note from our contractor stating the advantages / disadvantages of external foam vs perlite insulation. Reaching out to see if anyone has operational history with a perlite-insulated tank. Specific queries we have are: a) Does the perlite lose its insulating property over time? b) Any known operational issues with perlite condensation / freezing and liquid accumulation in the annulus?
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