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    ASTM D7170-16

    Standard Test Method for Determination of Derived Cetane Number (DCN) of Diesel Fuel Oils—Fixed Range Injection Period, Constant Volume Combustion Chamber Method (Withdrawn 2019)

    Withdrawn Standard: ASTM D7170-16 | Developed by Subcommittee: D02.01


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    Withdrawn Rationale:

    This test method covers the quantitative determination of the ignition characteristics of conventional diesel fuel oils, diesel fuel oils containing cetane number improver additives, and is applicable to products typical of Specification D975, Grades No. 1-D and 2-D regular and low-sulfur diesel fuel oils, European standard EN 590, and Canadian standards CAN/CGSB-3.517-2000 and CAN/CGSB 3.6-2000. The test method may also be applied to the quantitative determination of the ignition characteristics of blends of fuel oils containing biodiesel material, and diesel fuel oil blending components.

    Formerly under the jurisdiction of Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants, this test method was withdrawn in November 2019 for the following reasons: (1) The number of active users is insufficient to support the requirement in Annex A3 that the correlation equation be reviewed at least every three years by the application of D6708: (a) The number of laboratories reporting D7170 results in the Diesel National Exchange Group has steadily declined in recent years, to the extent that for the past two years only one user has reported data in the NEG; (b) Application of D6708 is not possible because of the small number of active users. (2) In discussion of the proposed withdrawal at the December 11, 2018 D02.01 meeting, the manufacturer’s representative stated that the product (FIT instrument) is at the end of its life cycle and new units are not being produced. The manufacturer will continue to support the product as much as possible, but some components are no longer available. (3) In discussion of the proposed withdrawal at the December 11, 2018 D02.01 meeting, the chair of the Cetane Task Force of Subcommittee E02.02, Diesel Fuel Oils, stated that D7170 was considered to be “marginally supported” and that the chair would seek its withdrawal from D975 and other Subcommittee E specifications, irrespective of the withdrawal of this test method.

    1. Scope

    1.1 This test method covers the quantitative determination of the ignition characteristics of conventional diesel fuel oils, diesel fuel oils containing cetane number improver additives, and is applicable to products typical of Specification D975, Grades No. 1-D and 2-D regular and low-sulfur diesel fuel oils, European standard EN 590, and Canadian standards CAN/CGSB-3.517-2000 and CAN/CGSB 3.6-2000. The test method may also be applied to the quantitative determination of the ignition characteristics of blends of fuel oils containing biodiesel material, and diesel fuel oil blending components.

    1.2 This test method measures the ignition delay and utilizes a constant volume combustion chamber with direct fuel injection into heated, compressed air. An equation converts an ignition delay determination to a derived cetane number (DCN).

    1.3 This test method covers the ignition delay range from a minimum value of 35.0 DCN (ignition delay of 4.89 ms) to a maximum value of 59.6 DCN (ignition delay of 2.87 ms). The average DCN result for each sample in the ILS ranged from 37.29 (average ignition delay of 4.5894 ms) to 56.517 (average ignition delay of 3.0281 ms).

    1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.



    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D613 Test Method for Cetane Number of Diesel Fuel Oil

    D975 Specification for Diesel Fuel Oils

    D1193 Specification for Reagent Water

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants

    D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products

    D5854 Practice for Mixing and Handling of Liquid Samples of Petroleum and Petroleum Products

    D6299 Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance

    D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants

    D6708 Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport to Measure the Same Property of a Material

    E456 Terminology Relating to Quality and Statistics

    E832 Specification for Laboratory Filter Papers

    EN Standard

    EN 590

    Energy Institute Standard

    IP 41 Ignition Quality of Diesel FuelsCetane Engine Test Method

    Canadian Standards

    CAN/CGSB-3.517-2000 Regular Sulphur Diesel FuelSpecification

    CAN/CGSB 3.6-2000 Automotive Low-Sulphur Diesel FuelSpecification

    DIN Standard

    DIN 73372 Einspritzdsen Grsse T und U


    Referencing This Standard
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    DOI: 10.1520/D7170-16

    Citation Format

    ASTM D7170-16, Standard Test Method for Determination of Derived Cetane Number (DCN) of Diesel Fuel Oils—Fixed Range Injection Period, Constant Volume Combustion Chamber Method (Withdrawn 2019), ASTM International, West Conshohocken, PA, 2016, www.astm.org

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