ASTM D4737-10(2016)
Standard Test Method for Calculated Cetane Index by Four Variable Equation

Standard No.

ASTM D4737-10(2016)

Release Date

2010

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D4737-21

Latest

ASTM D4737-21

Scope

4.1 The Calculated Cetane Index by Four Variable Equation is useful for estimating ASTM cetane number when a test engine is not available for determining this property directly and when cetane improver is not used. It may be conveniently employed for estimating cetane number when the quantity of sample available is too small for an engine rating. In cases where the ASTM cetane number of a fuel has been previously established, the Calculated Cetane Index by Four Variable Equation is useful as a cetane number check on subsequent batches of that fuel, provided the fuel's source and mode of manufacture remain unchanged.

Note 2: Test Methods D6890 and D7170 may be used to obtain a Derived Cetane Number (DCN) when the quantity of sample is too small for an engine test. These methods do measure the effect of cetane improver.

4.2 Within the range from 32.5 to 56.5 cetane number, the expected error of prediction of Procedure A of the Calculated Cetane Index by Four Variable Equation will be less than ±2 cetane numbers for 658201;% of the distillate fuels evaluated. Errors may be greater for fuels whose properties fall outside the recommended range of application.

1.1 The calculated Cetane Index by Four Variable Equation provides a means for estimating the ASTM cetane number (Test Method D613) of distillate fuels from density and distillation recovery temperature measurements. The value computed from the equation is termed the Calculated Cetane Index by Four Variable Equation.

1.2 The Calculated Cetane Index by Four Variable Equation is not an optional method for expressing ASTM cetane number. It is a supplementary tool for estimating cetane number when a result by Test Method D613 is not available and if cetane improver is not used. As a supplementary tool, the Calculated Cetane Index by Four Variable equation must be used with due regard for its limitations.

1.3 Procedure A is to be used for Specification D975, Grades No. 1–D S15, No. 1–D S500, No. 1–D S5000, No. 2–D S15, No. 2–D S5000, and No. 4–D. This method for estimating cetane number was developed by Chevron Research Co.2 Procedure A is based on a data set including a relatively small number of No. 1–D fuels. Test Method D4737 Procedure A may be less applicable to No.8201;1–D S15, No. 1–D S500, and No. 1–D S5000 than to No. 2–D grade S5000 or to No. 4–D fuels.

1.3.1 Procedure A has been verified as applicable to Grade No. 2–D S15 diesel fuels.3

1.4 Procedure B is to be used for Specification D975, Grade No. 2–D S500.

1.5 The test met......

ASTM D4737-10(2016) Referenced Document

• ASTM D1298 Standard Test Method for Density, Relative Density (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method
• ASTM D2887 Standard Test Method for Boiling Range Distribution of Petroleum Fractions by Gas Chromatography
• ASTM D4052 Standard Test Method for Density and Relative Density of Liquids by Digital Density Meter
• ASTM D613 Standard Test Method for Cetane Number of Diesel Fuel Oil
• ASTM D6751 Standard Specification for Biodiesel Fuel Blendstock (B100) for Middle Distillate Fuels
• ASTM D6890 Standard Test Method for Determination of Ignition Delay and Derived Cetane Number (DCN) of Diesel Fuel Oils by Combustion in a Constant Volume Chamber
• ASTM D7170 Standard Test Method for Determination of Derived Cetane Number (DCN) of Diesel Fuel Oils&x2014;Fixed Range Injection Period, Constant Volume Combustion Chamber Method*， 2024-04-20 Update
• ASTM D86 Standard Test Method for Distillation of Petroleum Products
• ASTM D975 Standard Specification for Diesel Fuel Oils

ASTM D4737-10(2016) history

• 2021 ASTM D4737-21 Standard Test Method for Calculated Cetane Index by Four Variable Equation
• 2010 ASTM D4737-10(2016) Standard Test Method for Calculated Cetane Index by Four Variable Equation
• 2010 ASTM D4737-10 Standard Test Method for Calculated Cetane Index by Four Variable Equation
• 2009 ASTM D4737-09a Standard Test Method for Calculated Cetane Index by Four Variable Equation
• 2009 ASTM D4737-09 Standard Test Method for Calculated Cetane Index by Four Variable Equation
• 2004 ASTM D4737-04 Standard Test Method for Calculated Cetane Index by Four Variable Equation
• 2003 ASTM D4737-03 Standard Test Method for Calculated Cetane Index by Four Variable Equation
• 1996 ASTM D4737-96a(2001) Standard Test Method for Calculated Cetane Index by Four Variable Equation
• 1996 ASTM D4737-96a Standard Test Method for Calculated Cetane Index by Four Variable Equation