ASTM D7668-14a
Standard Test Method for Determination of Derived Cetane Number (DCN) of Diesel Fuel Oils—Ignition Delay and Combustion Delay Using a Constant Volume Combustion Chamber Method
- Standard No.
- ASTM D7668-14a
- Release Date
- 2014
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM D7668-17
- Latest
- ASTM D7668-23
- Scope
- 1.1 This test method covers the quantitative determination of the derived cetane number 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, low and ultra-low-sulfur diesel fuel oils, European standard EN590, and Canadian standards CAN/CGSB-3.517 and CAN/CGSB3.6. The test method may be applied to the quantitative determination of the derived cetane number of biodiesel, blends of diesel fuel oils containing biodiesel material (for example, Specifications D975, D6751, and D7467), and diesel fuel oil blending components. 1.2 This test method utilizes a constant volume combustion chamber with direct fuel injection into heated, compressed synthetic air. A dynamic pressure wave is produced from the combustion of the sample. An equation converts the ignition delay and the combustion delay determined from the dynamic pressure curve to a derived cetane number (DCN). 1.3 This test method covers the ignition delay ranging from 1.9 to 25 ms and combustion delay ranging from 2.5 to 160 ms (30 to 70 DCN). However, the precision stated only covers the range of DCN from 39 to 67. 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.
ASTM D7668-14a Referenced Document
- ASTM D1193 Standard Specification for Reagent Water
- ASTM D4057 Standard Practice for Manual Sampling of Petroleum and Petroleum Products
- ASTM D4175 Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants*， 2023-07-01 Update
- ASTM D4177 Standard Practice for Automatic Sampling of Petroleum and Petroleum Products
- ASTM D5854 Standard Practice for Mixing and Handling of Liquid Samples of Petroleum and Petroleum Products
- ASTM D613 Standard Test Method for Cetane Number of Diesel Fuel Oil
- ASTM D6299 Standard Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance*， 2023-07-01 Update
- ASTM D6300 Standard Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants
- ASTM D6708 Standard Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport to Measure the Same Property of a Material*， 2024-03-01 Update
- ASTM D6751 Standard Specification for Biodiesel Fuel Blendstock (B100) for Middle Distillate Fuels*， 2023-04-01 Update
- ASTM D7467 Standard Specification for Diesel Fuel Oil, Biodiesel Blend (B6 to B20)*， 2023-10-01 Update
- ASTM D975 Standard Specification for Diesel Fuel Oils
- ASTM E456 Standard Terminology for Relating to Quality and Statistics
- CAN/CGSB-3.517 Diesel fuel*， 2020-02-01 Update
ASTM D7668-14a history
- 2023 ASTM D7668-23 Standard Test Method for Determination of Derived Cetane Number (DCN) of Diesel Fuel Oils—Ignition Delay and Combustion Delay Using a Constant Volume Combustion Chamber Method
- 2017 ASTM D7668-17 Standard Test Method for Determination of Derived Cetane Number (DCN) of Diesel Fuel Oils—Ignition Delay and Combustion Delay Using a Constant Volume Combustion Chamber Method
- 2014 ASTM D7668-14a Standard Test Method for Determination of Derived Cetane Number (DCN) of Diesel Fuel Oils—Ignition Delay and Combustion Delay Using a Constant Volume Combustion Chamber Method
- 2014 ASTM D7668-14 Standard Test Method for Determination of Derived Cetane Number 40;DCN41; of Diesel Fuel Oilsmdash;Ignition Delay and Combustion Delay Using a Constant Volume Combustion Chamber Method
- 2012 ASTM D7668-12a Standard Test Method for Determination of Derived Cetane Number (DCN) of Diesel Fuel Oilsmdash;Ignition Delay and Combustion Delay Using a Constant Volume Combustion Chamber Method
- 2012 ASTM D7668-12 Standard Test Method for Determination of Derived Cetane Number (DCN) of Diesel Fuel Oilsmdash;Ignition Delay and Combustion Delay Using a Constant Volume Combustion Chamber Method
- 2010 ASTM D7668-10 Standard Test Method for Determination of Derived Cetane Number (DCN) of Diesel Fuel Oils
