IGS-Liquid Cargo Surveys

Liquid Cargo Surveys

IGS is capable of performing surveys of liquid cargoes for quality and quantity, all to the highest standards, both at the time of loading and discharging of shipments.  It has qualified experts to inspect liquid chemical and petrochemical export and import products as well as to survey ship holds/tanks and shore tanks that are nominated for loading and storage of liquids respectively.  It is active in this field on a vast scale, the most important of its activities being as follows:

 

  • Crude Oil and Oil Products

Inspections of crude oil and oil products perform by IGS inspectors in following details:

  • Taking samples from shore tanks and shore lines and sealing sample containers
  • Attending at the laboratory in order to supervise the tests and analyses and compare the results with the specifications
  • Performing initial inspection of the ship tanks that are nominated for loading the cargo in question to ensure that they are fit for taking the cargo (oil products), and carrying out the initial computations
  • Measuring the amount of fuel and balance water in the tanks
  • Measuring the tanks not nominated for loading
  • Inspecting the void spaces
  • Supervising the loading and preparation of the required samples
  • Determining the quantity loaded on the basis of the ship tanks, the shore tanks or the metering system
  • Filling in and completing the inspection forms
  • Making out the protest letters, if required
  • Issuing the required certificates

 

  • chemical and Petrochemical Products

Inspections of chemical and petrochemical products perform by IGS inspectors in following details:

  • Taking samples from the contents of shore tanks at least 24 hours before the arrival of the nominated vessel and sealing the sample container
  • Being present at the laboratory in order to supervise the tests and analyses and compare the results with the specifications
  • Taking samples from the shore line immediately upon arrival of the vessel
  • Performing visual inspections of ship tanks as well as wall wash sampling of the tanks
  • Performing key tests on wall wash samples taken from each of the ship tanks
  • Giving permission for the first foot loading in each of the ship tanks if the shore tank and shore line sample  tests have proved satisfactory and the holds are found to be clean
  • Performing key tests on first foot samples taken from the ship tanks
  • Allowing loading to continue if the first foot samples prove satisfactory; and issuing tank cleanliness certificates
  • Supervising the loading, and taking samples as required
  • Determining the quantity of the product loaded on board
  • Filling in and completing the inspection forms
  • Making out the protest letters, if required
  • Issuing the required certificates

 

  • Vegetable and Industrial Oils and General Liquid Products

Inspections of vegetable and industrial oils and general liquid products perform by IGS inspectors in following details:

  • Taking samples from the shore tanks to test and ensure the tanks are fit to hold the product
  • Being present at the laboratory in order to supervise the tests and analyses
  • Taking samples from the product in the ship tanks and measuring the quantity of the shipment
  • Performing tests on the samples taken from the ship tanks to ensure that the quality is right and fit for discharging into the shore tanks; and if so, allowing discharge to begin
  • Determining the Remain on Board (ROB) quantity after completion of discharge
  • If the shore tanks are calibrated, measuring the quantity in the shore tanks as received from the vessel
  • Filling in and completing the inspection forms
  • Making out the protest letters, if required
  • Issuing the required certificates

 

  • Liquid Gases

Inspections of liquid gases performs by IGS inspectors in following details:

  • Sampling from the shore tanks at least 24 hours before the arrival of the incoming vessel
  • Supervising the tests performed on the shore tank samples in the presence of an independent inspector and comparison of the test results with the specifications
  • Inquiring about the previous cargo carried on board the vessel as soon as it berths alongside quay (result of the inquiry to be in writing)
  • If the previous cargo is the same as the present cargo and there is no need for purging or cooling action is immediately taken to measure the tanks after  which loading shall commence
  • If the previous cargo proves not to have been the same as the cargo now to be loaded then the tanks are gas freed first and the percentage of gas remaining  is determined through a gas detector and then the vessel goes through purging followed by cooling
  • Once the amount of loss has been determined, loading begins
  • Determining the quantity loaded
  • Filling in and completing the inspection forms
  • Making out the protest letters, if required
  • Issuing the required certificates
  • Means of Transportation Survey in Accordance with International Standards
  • Taking samples from the shore tanks (if loading is to be from shore tanks into means of transportation), or from ship tanks (if discharge is to be directly from the vessel to the means of transportation)
  • Being present at the laboratory in order to supervise the tests and analyses and compare the results with the specifications
  • Inspecting the tanks of the means of transportation to ensure it is clean and dry
  • Random sampling from the means of transportation and performing key test if required
  • Measuring the amount loaded in each of the means of transportation
  • Sealing the tanks of the means of transportation
  • Filling in and completing the inspection forms
  • Issuing the required certificates

 

  • Measurement and Calibration of Tanks

Measurement and Calibration of Tanks It is of great importance to measure the storage volume of tanks and prepare tables for practical purposes.  IGS is approved and certified by NIOC as an inspection company to carry out such measurements and calibrations with respect of shore tanks according to API and ISO standards