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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, 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under the jurisdiction of Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants, this test method was withdrawn in November 2019 for the following reasons: (1) The number of active users is insufficient to support the requirement in Annex A3 that the correlation equation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 : (a) The number of laboratories reporting 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 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 was considered to be “marginally supported” and that the chair would seek its withdrawal from and other Subcommittee E specifications, irrespective of the withdrawal of this test method.
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 , 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.
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 StandardEN 590
Energy Institute StandardIP 41 Ignition Quality of Diesel FuelsCetane Engine Test Method
Canadian StandardsCAN/CGSB-3.517-2000 Regular Sulphur Diesel FuelSpecification CAN/CGSB 3.6-2000 Automotive Low-Sulphur Diesel FuelSpecification
DIN StandardDIN 73372 Einspritzdsen Grsse T und U
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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), ASTM International, West Conshohocken, PA, 2016, www.astm.orgBack to Top