ASTM WK65397

    Revision of D1655 - 18a Standard Specification for Aviation Turbine Fuels

    (What is a Work Item?)

    Active Standard: D1655 - 19

    Developed by Subcommittee: D02.J0.01 | Committee D02 | Contact Staff Manager



    WK65397


    Keywords

    aviation turbine fuel; avtur; Jet A; Jet A-1; jet fuel; turbine fuel ;;

    Rationale

    The supplier of the Fluorescent Indicator Dyed Gel used in ASTM D1319 (and IP 156) is no longer able to supply the dye needed for the method to work with aviation turbine fuel. Lot numbers 3000000975 and above WILL NOT PROVIDE CORRECT AROMATICS VALUES. Subcommittee D02.04 Hydrocarbon Analysis (Sub 4) is working to try and find a resolution to this problem. When it became apparent that the latest batch of dye no longer worked for aviation turbine fuel, the supplier informed Sub 4 that a key component of the dye was no longer available from any source. They thought they had developed an alternative blend that would be suitable but only tested the material on gasoline type materials. The dye supplier is trying to find an alternate dye supply that would restore the ability to measure aromatics in distillate fuels but the reports are not encouraging at this time. There is some promising work that suggests a significant change in lighting could work but that is far from certain. Concurrently, there is strong pressure on Sub 4 to standardize on the new dye formulation that appears to work for gasoline type materials, the dominate use for this material. Right now it is estimated that, in the broadest sense, ASTM D1319 will no longer be viable for aviation turbine fuel by the end of 2018. Currently the only alternative to using D1319 is ASTM D6379, the Standard Test Method for Determination of Aromatic Hydrocarbon Types in Aviation Fuels and Petroleum DistillatesHigh Performance Liquid Chromatography Method with Refractive Index Detection (HPLC-RID). This method has been in the specification since 2006, although there is a very small installed base of users. There is another method available for the measuring aromatic of jet fuel, ASTM D5186, the Standard Test Method for Determination of the Aromatic Content and Polynuclear Aromatic Content of Diesel Fuels and Aviation Turbine Fuels by Supercritical Fluid Chromatography. This method was not adopted for aviation turbine fuel specifications because it reports aromatics in mass%, whereas the specification is limited by volume%. (ASTM D6379 is actually a mass% method that is adapted to generate volume% data.) With two methods in the specification that provide data in volume%, there was little impetus to add a third. In this situation, where ASTM D1319 may not be useable for measuring aromatics for an extended period (or perhaps ever), the subcommittee is proposing to add D5186 to the specification. While the aviation fuel community never developed a mass% to volume% correlation for D5186, the California Air Resources Board (CARB) did, and it is part of the California Code of Regulations regarding standards for diesel fuel. CCR 2282, Aromatic Hydrocarbon Content (ArHC), states the limit of for aromatic volume% will be evaluated by D5186 using the following correlation calculation: ArHC v% = (0.916)(ArHC w%) + 1.33 While ASTM D975 diesel fuel can have up 35 volume% aromatic content, CARB holds diesel used in California to less the 20 volume%. Therefore, we understand the correlation effort for D5186 was focused on fuels with aromatic contents similar to those found in aviation turbine fuel. The installed base of instruments running D5186 to meet CARB regulations would cover all of California and a substantial amount of adjoining states and Mexico from which California receives fuel. This is an advantage to the aviation community there and in other locations where the related companies can take advantage of the existing knowledge.

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    Work Item Status

    Date Initiated:
    10-15-2018

    Technical Contact:
    George Wilson

    Status:
    Draft Under Development