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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Petroleum Calculation Series: Gas Tanker Terms
Sep08

Petroleum Calculation Series: Gas Tanker Terms

Absolute Pressure The absolute pressure is the total of the gauge pressure plus the pressure of the surrounding atmosphere. Absolute Temperature The fundamental temperature scale with its zero at absolute zero and expressed in degrees Kelvin. One degree Kelvin is equal to one degree Celsius or one degree Centigrade. For the purpose of practical calculations in order to convert Celsius to Kelvin add 273. It is normal for the degree...

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