Procedure of Calculations Using Density, API & Relative Density
Feb03

Procedure of Calculations Using Density, API & Relative Density

  Working with Density at 15°C in air: 1) Observed Ullage – apply corrections – get Corrected Ullage 2) Observed Interface – apply corrections – get Corrected Interface 3) From Corrected Ullage, find Total Observed Volume TOV (in cubic metres) 4) From Corrected Interface, find Volume of Water (in cubic metres) 5) TOV – Water = Gross Observed Volume (GOV) of Cargo (in cubic metres) 6) Use Density at...

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Petroleum Calculation Series: Wedge Formula
Mar07

Petroleum Calculation Series: Wedge Formula

As I have requested by comments to post about Wedge Formula of liquid cargo measurement, herewith the article collected from internet What is Wedge Formula? Wedge Formula is calculation to determine the small quantity of liquid or non liquid cargo (On Board Quantity – OBQ or Remaining On Board – ROB) on cargo tanks, where it should fulfill the following conditions : – The vessel has huge trim, but there is no trim...

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Gas Tanker: Specimen of Calculation
Nov07

Gas Tanker: Specimen of Calculation

The following example demonstrates the typical procedure outlined using the standard temperature of 15°C as applied to cargo in a ship’s tank. Measurement data — Tank No.3 port Product — Propane Gauge reading of liquid depth  ………………………………….. : 10.020 metres Ship’s trim...

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Gas Tanker Calculation Procedures
Nov06

Gas Tanker Calculation Procedures

Independent cargo surveyors are often employed by cargo buyers or sellers and the survey companies provide personnel to check cargo operations and cargo quantities both on board ship and within terminals. Such activities can include cargo measuring and cargo sampling. During cargo operations, it is important to maintain a log of events. Ship’s officers and shore personnel should ensure that their time records are in agreement...

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Petroleum Calculation Series: Gas Tanker Principal Products
Nov01

Petroleum Calculation Series: Gas Tanker Principal Products

The hydrocarbon gases methane, ethane, propane and butane may be regarded principally as fuels, the LPGs are also important as feedstock in the production of the chemical gases. Liquefied Natural Gas (LNG) Natural gas is transported either by pipeline as a gas or by sea in its liquefied form as LNG. Natural gas comes from underground deposits. Its composition varies according to where it is found but methane is by far the predominant...

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