How to prepare a cargo loading or discharge program ? Loading / stress computer for chemical tankersĬlosed loading requirement of various grade liquid chemicals and related considerations Handling of high vapour pressure cargoes, topping off procedure & use of compressed gas during chemical cargo loading Intact stability guideline for double hull chemical tankers Traces of waterin the cargo, and may cause great errors in the recorded free waterĬareful assessment to be done for applicable load lines during cargo calculations, it is also important that a structured message containing all the applicable deductibles sent to the charterers immediately on receipt of cargo query. Water finding paste as the Vecom paste tends to change colour in contact with suspended Kolor Kut water finding paste should be used if possible, in preference to Vecom The sounding rod is left on the bottom for a minute, and gently worked up and down. Water dips can successfully be taken in almost any heated cargo, if If glass thermometers have been used, a note is to be made on the Thermometers are to be used in preference to blocking up all the ship’s electronic Some cargoes however, will block the sensor of the thermometer. This can only be done with electronic probe thermometers. With heated cargoes, great care must be taken to establish the correct average These two parameters are the basis for the cargo calculation and theyĪre to be recorded in the “Ullage Report Form”. On completion of loading and prior to commencement of discharge operations theĬhief Officer together with the surveyor will check the ullage and the temperature of the Reduce the volume to 15C with table 54B, or 60F with table 6B as appropriate. Proceed with calculation using density 15C. If the density is given at 20C, as in Brazil or Rumania, it should be converted to 15C in the It is theĬompany policy that, except where tank calibrations are only in barrels, calculations ofĬargo quantity will be done using density at 15C and cubic metres as a volume measure. There are several standard temperatures in use throughout the industry. This to density at 15C, or API using table 3 in volume XI/XII Relative density 60/60 is the density of cargo at 60F/density of fresh water at 60F. Use table 54A or B in volumes VII or VIII or convert to API using table 3 in volume Relative density 15/4 can be treated exactly the same way as density at 15C as it is almost the Relative density 15/4 is the density of oil at 15C/density of fresh water at 4C. Use tables 54A or B in volumes VII and VIII.įor chemical cargoes the vessel to check with surveyors if density in air is suppliedīy cargo surveyors for the cargo to be loaded. These sets of books together with ship’s Ullage Tables or Sounding tables provideĮverything required for calculating the quantities of oil cargoes on board the vesselĭensity is by definition measured in vacuum at 15Cĭensity x volume (M³) gives metric tonnes in vacuum.ĭensity in vacuum subtracted by 0.0011 is known as densityġ000M³ at 15C of density 0.8560 is 856 metric tonnes (MT) in vacuum or 854.9 MT Tables for conversion between various Volume and Density Measures.Table 54B to be used for Petroleum Products correction of volume to 15✬ against Density.Table 6B to be used for petroleum Products correction of volume to 60✯ against API.Theįollowing is the list of ASTM volumes (with description of required tables) each vessel should Of Petroleum (IP) and the American Petroleum Institute (API), introduced the newĪPI/ASTM-IP Petroleum Measurement Tables (further ASTM tables).ġ4 volumes however only a few tables are required for onboard cargo calculations. In 1980, the American Society for Testing and Materials (ASTM) together with the London The following may be received in loading port: Used to convert the volume of cargo to Metric Tonnes. Observed temperature, using a correction factor. It must first be corrected to density in air at the The Specific Gravity (SG) given at the port of loading cannot be used directly with Temperature of a substance should be requested from the surveyor at the loading The range of substance temperatures (port of loading and port ofĭischarging) must also be taken in to consideration. Must be similar for loading and discharging. Different methods of calculation for various substances can be applied, but they
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