Question: This question applies to ISO tank linings. “Is there anything in CFR about pressure-testing lined tanks?”
Tank Guru: Not that I’m aware of. All tanks have to be pressure tested, regardless of whether they are lined. Additionally, the lining should be inspected visually as you would perform an interior inspection at the 2.5 and 5-year periodic anyway; and if the visual raises cause for concern then a spark test (or other type of additional inspection) may be warranted.
There is the IMDG language about waiver of the interior inspection during 2.5 year test for tanks in dedicated service (as I suppose that many lined tanks are), but as a tank owner you certainly wouldn’t want to skip something so important as a chance to ensure that your lining is holding up against the cargo!
Read More: International Maritime Dangerous Goods Code