ASTM WK66751

    Revision of D5188 - 16 Standard Test Method for Vapor-Liquid Ratio Temperature Determination of Fuels (Evacuated Chamber and Piston Based Method)

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    Active Standard: D5188 - 16

    Developed by Subcommittee: D02.08 | Committee D02 | Contact Staff Manager



    gasoline; gasoline-oxygenate blends; petroleum products; T(V/L = 20); vapor-liquid ratio ;;


    Several users have reported a measurement difference between the piston based vapor pressure and the evacuated chamber instruments. The two methods are according the ASTM published standard D5188, Vapor-Liquid Ratio for Temperature Determination of Fuels. Using pure components, such as CRMs used to verify calibration, no difference between the two methods can be observed. Early testing, using typical gasoline samples as a control check, indicates that the new piston-based instrument measures about 1C (2-3 degrees F) higher compared to older systems.

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    Work Item Status

    Date Initiated:

    Technical Contact:
    Oliver Sauer

    Draft Under Development