• Easily used by ships maintenance staff right out of the box

  • Instant indication of condition for motor bearings, gears, compressors, slewing rings, hoists, winches...

  • Plan maintenance and have the spares available on time. Minimise off-hire and demurrage.
Quick Contact
CAPTCHA
This question is for testing whether you are a human visitor and to prevent automated spam submissions.
Image CAPTCHA
Enter the characters shown in the image.

Guidelines for Accepting or Rejecting a Fuel Delivery

ISO Specifications for fuel deliveries



ISO 4259:2006 provides for the systematic evaluation of the validity of a given result and assumes that the sample being analysed is a "representative" sample of the product delivered/received. Clause 9 of ISO 4259:2006 further establishes the means by which a supplier or recipient of fuel can judge its quality compared to the specification when a single test result is available.

Bunker sampler slice

First, some ISO 4259 terminology - ISO 8217:2010 tables 1 and 2 specify maximum and/or minimum limits for the true value of a given property as measured by the specified test method.


True Value



As defined by ISO 4259:2006, true value represents the average of an infinite number of single results obtained by an infinite number of laboratories. Therefore this true value can never be established exactly.

Fuel delivery graph

Above: fuel delivery graph and reproducibility


Reproducibility of test results



This is the closeness of agreement between individual (test) results obtained in the normal and correct operation of the same (test) method on identical test material but under different test conditions. It is the value where there is a 95% confidence that any good laboratory will report for a given sample value.

To apply the ISO standard requires knowledge of the precision statement of the test method used for analysing that parameter. If the test result is more than the specification limit plus 0.59 times the Reproducibility, then it is 95% certain that this fuel is off spec. In algebraic terms, the fuel fails specification when: 

Test Result exceeds Max Specification plus (0.59 x the Reproducibility). If the specification is a lower limit such as Flash Point, the sign is changed to minus. 



All ISO 8217: 2010 fuel category quality parameters can be viewed by clicking here.

Off-line Bunker Fuel

Latest News

Parker Kittiwake Launches New CAT Fines Test Kit
Test kit detects catalytic fines to prevent irreparable damage to fuel pumps, injectors, piston ring... Read More...
Switching Fuel Oil and the Risk of Loss of Propulsion
Nearly nine months have passed since the 0.1% sulphur limit for marine fuels in designated Emissions... Read More...
Measuring Ferrous Wear: the FWM vs. the Analex fdMplus
When it comes to detecting and analysing machine wear, testing for ferrous density – the prese... Read More...