Dipping Tape and Measuring Oil Tonnage
in oil industry or oil plant, there are a lot of oil storage tanks available. It is vital for the oil company to know their daily oil stock simply because they are in the oil business. Therefore, they need to measure the oil volume and further work out its tonnage. They need to know the exact volume of oil and to do that there are various methods. One of the traditional method is by using a dipping tape.
What is a dipping tape? Sorry, I could not find a suitable and proper definition for it. My own[link Point to another website Only the registered members can access]
I guess the next question from you will be: What is ullage ?
The amount which a tank or vessel lacks of being full.
is the empty space present when a shipping container is not full.
The space in a tank not occupied by its contents. Used as a measure of storage space still available.
I hope the ullage definition would give you some idea on the concept.
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For each storage tank, there'll be some sort of calibration table. From it, we can know what is the volume of oil at certain height. The tank height is also recorded in the calibration table. So, in order to know the volume of oil, we substract the tank height from the ullage (which we get from the dipping tape measurement), and we shall get the oil level height. From there, we can already get the volume of oil and work out the tonnage (with the temperature reading available).[link Point to another website Only the registered members can access]
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