Q. I need to find some articles about floating roof storage tanks.

You can find articles on this subject in COM Library's science databases.  Follow the link below to the databases guide and select the Science page.  Then select a database to search.

I was able to find some articles about these types of storage tanks in ProQuest Central by entering the following query: "floating roof" tanks.  If you want to modify your search, you can do so through the search limiters on the left side of the screen.