Posts about table 53A written by ronmooring. both ASTM and tables , calculations for Special Applications, LPG/NGL calculations). Volume VII – Generalized Crude Oils (Tables 53A & 54A) Volume VIII – Generalized Products (Tables 53B and 54B) Volume IX – Individual. If ” PRODUCTS ” TABLES 54B and 6B are selected, 1, A.S.T.M. TABLES. 2
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If we multiply these two, we get the weight by a simple formula. Get your hands on ASTM tables and you will find that cargo calculations are ast, as difficult as it seems. Unit of weight What is the unit of this weight? We multiply both and we get the weight of the cargo. Seafarers Question Answers Ask or answer a question on this forum.
Here is how the ullage report would look like so far. This podcast on the maritime matters will provide value to the listeners. All of your blogs did a vast contribution to pass my orals exam from uk in my first attempt Well, the weight is Vacuum is always 53z than the weight in Air.
Let us use the same volumes and temperatures that we have used in our initial example. Now we get the volumes for each of these tanks for the corrected ullage that we have got. But we need to understand that at the very basic level, we calculate the volume from ullage tables and we need to be provided with density at the same temperature as the cargo.
Your work is greatly appreciated, Sir! Coming back to the topic, can you guess for the same amount of cargo which weight would be more? Similarly, we need to find the VCF for cargo temperatures of other tanks. There is a simple formula to convert these. Sometimes it is difficult to understand which one to use and why. Share your knowledge by writing answers to the question.
The standard volume of the cargo would also remain same as this is the volume at the fixed temperature 15 Deg C.
Adjunct to D Petroleum Measurement Tables Volume VII D 80 (HISTORICAL) – ADJD
So for these ports here is what the volumes and temperatures in ullage report would look like. But what if we are provided with API gravity at some other temperature, say at 80 deg F? And as the density also changes with the temperature, we would need the density of the cargo at the cargo temperature to convert the 53q volume to weight.
But here is the thing. Glad you found it helful Jorge. All this to make sure that we have the capacity to load maximum cargo and ship owner has a chance to earn maximum from it.
If you can’t explain it simply, you don’t understand it well enough”. Different manufacturer may have different densities for same chemical.
ASTM Table Series for Oil Survey
This is even easier than the previous section that we discussed. Short, crisp and full of value. Learn the difficult concepts of sailing described in a easy and story-telling way.
We need to convert the volumes to the weight of the cargo in each 553a. In above ullage report, I have applied the WCF to the Gross standard volume but we can easily make one additional column and apply the WCF to the standard volume of each tank to get the weight in the air for each tank. There are so many tables to use and so many terms that float. ASTM tables without any letter are common for both crude oils and product oils. Take a deep adtm and read on.
It is sometimes difficult to get a hang of these calculations. First, check what cargo surveyor has provided you. Rajeev Jassal Oct 7, How to convert weight ast Vacuum to weight in Air? Let us say we are interested in calculating the weight in Metric Tons in the air.
And even for the main ASTM tables, the information about which table need to be used for cargo calculation is provided by cargo surveyor. And to do that we need to apply the volume correction factor.
Cargo Calculations on Tankers with ASTM Tables: Here is all you need to know – MySeaTime
We can apply this WCF to the standard volume to get the weight of cargo in the air. The cargo surveyor may provide a table of densities at different temperatures. Let us say cargo surveyor provided the density at 15 deg C as 0.
And as you might have guessed correctly, these ports also do not measure the temperature in Deg C but in Asym F. Jorge Belalcazar Cardona Sep 29, The density at 15 Deg C is 53q the density in Vacuum. This is because, like with water, air and any other medium in which the weight is present would offer some kind of buoyancy which reduces the weight. We also measure the temperature of the cargo preferably at three levels and take the mean of these three temperatures to get the temperature of the cargo.