Razaghi Meyer International INtegrity Home. Up. Port State Authorities. Bunker Fuel Suppliers. Vessels. Fuel Management. Bad Bunkers. RMI Integrity for Bunker Fuel Suppliers

The Integrity Bunker Monitor:

Comprised of a digital viscometer installed either in the supplier’s delivery manifold or in the vessel’s bunker inlet manifold, the digital viscometer provides a continuous real time measurement of the density at 15°C and the kinematic viscosity at 50°C. This data is logged for later evaluation if required.

Integrity does not measure quality, it provides fuel quality assurance by testing the validity of the original fuel certificate.

If the fuel is not as described in the certificate then some simple diagnostics may be used to try and infer the cause; not all fuels need be rejected as many will still prove compliant.

Most important, it enables the commercial sample to be analysed without risk of having to de-bunker the fuel. It also avoids the risk of detention by Port State Authorities since it measures the very properties Port State may measure to determine “due cause” for detention (the detention of a vessel while the MARPOL samples are sent for laboratory analysis).

Integrity provides a basis for the fair and equable resolution of density problems at the time of bunkering.

Proven Sensors:

The Integrity solutions are based around the 7827 digital viscometer. This is a tuning fork sensor capable of considerable accuracy and which requires no servicing, calibration or routine maintenance and does not impose any need for crew skills or intervention.

Importantly, the viscometer already has many applications in the fuel oil industry from refinery operations to the engine.

Bunker Fuel Oil Quality:

The 7827 digital viscometer for analytical applications is used for Integrity fuel quality assurance during bunkering.

This has proven success in the marine industry and is used in refineries, on barges and in terminals for viscosity trim control during blending.

For many operators the sensor already forms part of their blending equipment and all that is needed to implement the  Integrity functionality is the additional software to manage the Integrity function and a PC.



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Fuel Quality

Fuel quality is an increasing concern for both fuel suppliers and for vessels.

The two principal motivators for this concern are the high price of fuel, which creates an increased concern for “value for money”, and the environmental legislation arising out of MARPOL Annex VI and other initiatives.

Fuel quality is determined by laboratory analysis and during bunkering all either party can rely on is this prior analysis. Between the time that the analysis was performed and bunkering the fuel, quality may have been compromised either inadvertently or through some deliberate act.

This could simply be due to poor fuel management and failing to maintain the fuels homogenous or keeping one batch segregated from another.

Thus the fuel analysis may not be valid due to:

Any or all of these problems may exist during bunkering but will be undetected.

The viscometer installation (in the steel cabinet) as part of a mechanical fuel blender on a barge.

See below for an interior view of the cabinet.

Only once bunkering is complete and the vessel has sailed will the commercial sample analysis be returned to show whether the fuel must be de-bunkered or if “value for money” was given and received.

Many disputes arise based on the density values used to account for the amount of fuel bunkered.

In the current market, even ethical suppliers and vessels may find that such disputes will continue to arise simply because of the current methods of supply, fuel management and the equipment used cannot guarantee the fuel quality.

Click on the images to enlarge