



 
Hi Daryl, The subject line of your email said barrels of oil and that is important as a barrel is a unit of volume in other situations also and barrels are not all the same size. A barrel of oil is 42 US gallons. I used our volume calculator with a diameter of 15.5 feet and a height of 1 inch and got a volume of 117.63 US gallons. Since there are 42 gallons in a barrel of oil that is $\large \frac{117.63}{42} \normalsize = 2.801 \mbox{ barrels.}$ This means that $\large \frac{180}{2.801} \normalsize = 64.27$ inches would give 180 barrels. I would check that the diameter of the tank is actually 15 feet 6 inches as a tank with this diameter and a height of 16 feet contains 537.7 barrels not 500. Harley In May 2014 Daryl sent his question again
Daryl, The confusion comes from the tank manufacture's use of the term nominal. According to the Merriam Webster online dictionary the term nominal means "existing as something in name only : not actual or real". If you scroll down the page on the Merriam Webster site for the full definition you will see 3b which says "of, being, or relating to a designated or theoretical size that may vary from the actual : approximate <the pipe's nominal size>". In your original question you had "Nominal diameter  15'6", nominal height  16ft, nominal capacity  500 barrels". If that is what is printed on the manufacturer data plate then there is nothing I can do yo help as you don't know any of the actual dimensions. Harley Comment from Ben In March of 2019 we received this comment from Ben.
Thanks for this Ben, Harley  


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