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  • Product with negative API gravity

    by
    antonvaio
    Published on 11-04-2010 09:00 PM
    1 Comment Comments
    Hello all,


    We had some problems this summer to calculate quantity of cargo for oil tanker. The cargo of Decant Oil with API gravity -4 (minus). We had a required metric tones and needed to calculate standard and observed volume to load the tanker. The ASTM/API tables does not work with negative API.

    Initial data:
    Cargo - Decant Oil
    API - "-4"
    Temp - 50 deg. Cels.
    Weight - 20000mt

    Required:

    Gross observed volume (GOV) - ?
    Gross standard volume (GSV) - ? @60deg. F

    Could anybody please explain the correct way for such calculations? What tables/data should we use? Does the calculation differ from crude oil calculations?

    Many thanks to You
    and Best Regards.
    This article was originally published in forum thread: Product with negative API gravity started by antonvaio View original post
    Comments 1 Comment
    1. mobek's Avatar
      mobek - 11-05-2010, 12:27 AM
      The volume @60 F is 18.04 cubic meters. Correct the vol. for 50 C.
      For liquids heavier than water you should use degree Baume instead of degree API.

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