After completion of cargo custody transfer, transferred quantity can be determined by two different methods; based upon vessel’s tank measurement; and based upon a calibrated shore tank measurement or by a custody transfer flow meter, Usually, the quantity of cargo measured, using the two methods mentioned above, differ in numbers. One reason for …
The American Petroleum Institute published Chapter 12, Section 1, Part 1 of its Manual of Petroleum Measurement Standards titled, “Calculation of Static Petroleum Quantities – Up- right Cylindrical Tanks and Marine Vessels” in 1996. This standard has introduced a significant change in how shore tank quantities are calculated. The New Correction Upright cylindrical tanks have …
VERTICAL STORAGE TANKS – SHELL EXPANSION CORRECTION Read More »
ROB is “the sum of liquid volume and non-liquid volume in cargo tanks just after completion of discharge, excluding clingage, hydrocarbon vapours and the contents of associated pipelines and pumps”. Claims for short out turn arise due to excessive ROB on board after completion of the discharge. Vessel must discharge all ‘pumpable’ cargo that it …