Hi marine cargo surveyor. :). It was about three months with no posting, as I have faced busy days.
Previously, we have discussed topics about Draft survey : Terms of Conduct, Draft Survey : Procedures and Calculation, Draft Survey : Specimen of Calculation, How To Conduct Bunker Survey, and Bunker Survey Calculation. Appreciated every feedbacks and comments around the posts.
In this posts, I will generally introduce about cargo hold cleanliness survey. The hold cleanliness survey is conducted to ensure the cargo hold condition before loading by inspected whether the hold is ready to load the nominated cargo or not.
I have added some software relate to oil calculation. The software are:
A Bunker Tank Sounding calculation program. Bunker survey calculation for tank sounding report based on ASTM Table 54B .
Follow this link to know more http://www.sevensurveyor.com/software/7s-bunkercal/
2. 7s-OilCal-Table 6A, 6B, 54A, 54B
A Petroleum calculation program. For shipboard survey with calculation and ullage report based on ASTM Table 6A, 6B, 54A and Table 54B.
For more info check here: http://www.sevensurveyor.com/software/7s-oilcal.
Hope the software is useful. Please try it and drop your comment here.
The shipboard loading survey is conduted to get the quantity loaded onboard the vessel with measurement of cargo tank. The sounding or ullaging are performed to obtain the level of oil and free water on each tank. The obtained oil level data were calculated by using ship tank table to get TOV and total free water.
Data required for Crude Oil Survey:
- Tank Number
- Tank Reference Height
- Dip innage (sounding) or ullage
- Free water dip (FW)
- Oil temperature (C or F)
- Oil density or API
- BS&W volume in % (as per analysis result)
Ambient Temperature: The temperature of the surrounding medium such as the atmosphere.
API: American Petroleum Institute.
API Gravity (Relative Density): A means used by the petroleum industry to express the density of petroleum liquids. API gravity is measured by a hydrometer instrument having a scale graduated in degrees API. The relation between API gravity and relative density (formerly called specific gravity) is: API Gravity at 60 Deg. F. = (141.5 : Relative Density 60F/60F) – 131.5
ASTM: American Society for Testing Materials. Grade and quality specifications for petroleum products are determined by ASTM test methods.
Barrel: The standard unit of liquid volume in the petroleum industry. It is equal to 42 U.S. gallons.
BS & W: Bottom sediment and water.
Bunkers: Fuel for a vessel. The type will vary depending upon the propulsion mode of the vessel. Steamships will use a heavy fuel oil, diesels use a range of fuels from heavy to light, and gas turbines generally use kerosene
Cargo Pump: Pump used on tankers for discharging cargo and loading or discharging ballast. Located, at the bottom of the pump room, these pumps are usually of the common duplex type, or turbine type of which the centrifugal is the most common.
Clingage: The residue that adheres to the inside surface of a container, such as a ship’s tank or shore tank, after it has been emptied.