ASTM WK36599

    Revision of D7170 - 11 Standard Test Method for Determination of Derived Cetane Number (DCN) of Diesel Fuel Oils—Fixed Range Injection Period, Constant Volume Combustion Chamber Method

    (What is a Work Item?)

    Active Standard: D7170 - 14

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


    1. Rationale

    One of the QC standards, Methylcyclohexane (MCH), has been determined to suffer from contamination such as peroxides which lower the ignition delay (ID) of this QC fuel. Much effort has been put into cleansing of this material, but the contaminants affect the ability of the users of this test method to distinguish between instrument problems or QC fuel contamination. A suitable alternative QC fuel was determined to have similar ignition delay (ID) range which does not suffer the affects of this contamination. This fuel was examined by several users on their own equipment and found it to be a suitable alternative to MCH. The robustness study was examined by the chair of precision and the Site Expected Values (SEV) were determined. Subsequently an approach in accordance with D6299 was proposed for ballot in D7170 to address this alternative QC fuel. The sections affected by this proposed change are section 8 (Reagents and Materials)and Section 11 (Calibration and Quality Control Testing).


    cetane number; derived cetane number; diesel performance; ignition characteristic; ignition delay; Cetane number; Derived cetane number (DCN); Diesel performance; Ignition--petroleum products;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    Jeffrey Bizub

    Draft Under Development