3.1 Specifications

Fuel Specifications
In 1982, the Working Group responsible for the development of the international standard issued the Draft Proposal of what became ISO 8217 “Petroleum products - Fuels (class F) - Specifications of marine fuels”. Issued at the same time was the Draft Proposal of what became ISO 8216 “Petroleum products - Fuels (class F) - Classification Part 1 - Marine Fuels”. The first edition of the international standards was published in 1987. In 1989, BS MA 100 was reissued and is identical to the International Standard. In 1996, the second edition of ISO 8217 was issued and this is denominated as ISO 8217 : 1996 (E). 

The ISO 8217:2010 Standard represents a significant advance over the previous 2005 version. The changes are designed to promote the safer use of marine residual and distillate fuels, recognising the fact that the industry is entering into a new realm of multi-blend products driven by ever increasing environmental regulation. Furthermore, users are provided with better protection against the supply of poor quality fuels. Additionally, the supporting Standard, ISO 8216, dealing with the classification of marine fuels, has similarly been updated to reflect the changes to ISO 8217.

It should be noted that in some countries, gas oil and diesel oil are produced for the local land-based market to a national specification. Included in such a specification is usually a minimum flash point and this value may be below that required by international legislation for normal marine use.

Summary of fuel specifications

New parameters for both distillate and residual fuels are the inclusion of acid number limits as well as a limit on hydrogen sulphide. For distillate grades, oxidation stability and a lubricity requirement have been introduced. For residual marine fuels, Calculated Carbon Aromaticity Index as an indictor of ignition delay, and a limit on sodium content have been introduced. As well as this, limits for ash and vanadium have been tightened and there has been a significant reduction in limits for aluminium plus silicon, also known as cat fines.

A PDF detailing the scope of changes in ISO 8217:2010 versus ISO 8217:2005 can be viewed by clicking here.

If you would like to read more about the implications of the classification changes, further articles can be accessed by clicking here and here.

Below: INTERNATIONAL STANDARD ISO 8217:2010 (F)
Petroleum Products - Fuels (Class F) - Specifications of marine fuels. Requirements for marine distillate and residual fuels 

 

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