## 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...

## ASTM Table Series for Oil Survey

Series I – TABLE 5 & 6 – FOR API, °F, 60°F Volume I – Generalized Crude Oils (Tables 5A & 6A) Volume II – Generalized Products (Tables 5B and 6B) Volume III – Individual and Special Applications (Table 6C) Series II – TABLE 23 & 24 – FOR RELATIVE DENSITY, °F, 60°F Volume IV – Generalized Crude Oils (Tables 23A & 24A) Volume V – Generalized Products (Tables 23B and...

## 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...

## 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...