ASTM D5798-12
(Specification)Standard Specification for Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-Ignition Engines
Standard Specification for Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-Ignition Engines
ABSTRACT
This specification covers a fuel blend, nominally 75 to 85 volume % denatured fuel ethanol (Ed75-Ed85) and 25 to 15 additional volume % hydrocarbons for use in ground vehicles with automotive spark-ignition engines. Fuel ethanol (Ed75-Ed85) shall conform to the performance requirements prescribed. Fuel ethanol (Ed75-Ed85) shall be visually free of sediment and suspended matter. The hydrocarbon/aliphatic ether blend content, vapour pressure, acidity, pH requirements, gum content, inorganic chloride, water requirements, copper requirements, and sulphur requirements shall be tested to meet the requirements prescribed.
SCOPE
1.1 This specification covers the requirements for automotive fuel blends of ethanol and gasoline for use in ground vehicles equipped with flexible-fuel spark-ignition engines. Fuel produced to this specification contains 51 to 83 volume % ethanol. This fuel is for use in flexible-fuel vehicles and is sometimes referred to at retail as “Ethanol Flex-Fuel.” Appendix X1 discusses the significance of the properties specified.
1.2 The vapor pressure of ethanol fuel blends is varied for seasonal climatic changes. Vapor pressure is increased at lower temperatures to ensure adequate flexible-fuel vehicle operability. Ethanol content and selection of hydrocarbon blendstock are adjusted by the blender to meet these vapor pressure requirements. Hydrocarbon blendstocks for meeting ethanol fuel blends performance requirements are unleaded gasoline, gasoline blendstocks for oxygenate blending (BOBs), natural gasoline or other hydrocarbons in the gasoline boiling range.
1.3 This specification formerly covered Fuel Ethanol (Ed70-Ed85) for Automotive Spark-Ignition Engines, also known commercially as E85. The nomenclature “fuel ethanol” has been changed to “ethanol fuel blends” to distinguish this product from denatured fuel ethanol Specification D4806. To facilitate blending of ethanol fuel blends that meet seasonal vapor pressure requirements, a new lower minimum ethanol content has been established.
1.4 The United States government has established various programs for alternative fuels. Many of the definitions of alternative fuel used by these programs may be more restrictive than the requirements of this specification. See 4.1.2.1 for additional information on alternative fuels containing ethanol.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 The following safety hazard caveat pertains only to the test method portion, 8.1.8, of this specification. 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.
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Designation:D5798 −12
StandardSpecification for
Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-
1
Ignition Engines
This standard is issued under the fixed designation D5798; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 1.6 The following safety hazard caveat pertains only to the
test method portion, 8.1.8, of this specification. This standard
1.1 This specification covers the requirements for automo-
does not purport to address all of the safety concerns, if any,
tive fuel blends of ethanol and gasoline for use in ground
associated with its use. It is the responsibility of the user of this
vehicles equipped with flexible-fuel spark-ignition engines.
standard to establish appropriate safety and health practices
Fuelproducedtothisspecificationcontains51to83volume%
and determine the applicability of regulatory limitations prior
ethanol. This fuel is for use in flexible-fuel vehicles and is
to use.
sometimes referred to at retail as “Ethanol Flex-Fuel.” Appen-
dix X1 discusses the significance of the properties specified.
2. Referenced Documents
1.2 The vapor pressure of ethanol fuel blends is varied for
2
2.1 ASTM Standards:
seasonalclimaticchanges.Vaporpressureisincreasedatlower
D86Test Method for Distillation of Petroleum Products at
temperatures to ensure adequate flexible-fuel vehicle operabil-
Atmospheric Pressure
ity. Ethanol content and selection of hydrocarbon blendstock
D130Test Method for Corrosiveness to Copper from Petro-
are adjusted by the blender to meet these vapor pressure
leum Products by Copper Strip Test
requirements. Hydrocarbon blendstocks for meeting ethanol
D381Test Method for Gum Content in Fuels by Jet Evapo-
fuel blends performance requirements are unleaded gasoline,
ration
gasoline blendstocks for oxygenate blending (BOBs), natural
D525Test Method for Oxidation Stability of Gasoline (In-
gasoline or other hydrocarbons in the gasoline boiling range.
duction Period Method)
1.3 ThisspecificationformerlycoveredFuelEthanol(Ed70-
D1613Test Method for Acidity in Volatile Solvents and
Ed85) for Automotive Spark-Ignition Engines, also known
Chemical Intermediates Used in Paint, Varnish, Lacquer,
commercially as E85. The nomenclature “fuel ethanol” has
and Related Products
been changed to “ethanol fuel blends” to distinguish this
D1688Test Methods for Copper in Water
product from denatured fuel ethanol Specification D4806.To
D4057Practice for Manual Sampling of Petroleum and
facilitate blending of ethanol fuel blends that meet seasonal
Petroleum Products
vapor pressure requirements, a new lower minimum ethanol
D4175 Terminology Relating to Petroleum, Petroleum
content has been established.
Products, and Lubricants
D4177Practice for Automatic Sampling of Petroleum and
1.4 The United States government has established various
Petroleum Products
programs for alternative fuels. Many of the definitions of
D4306Practice for Aviation Fuel Sample Containers for
alternativefuelusedbytheseprogramsmaybemorerestrictive
Tests Affected by Trace Contamination
than the requirements of this specification. See 4.1.2.1 for
D4806Specification for Denatured Fuel Ethanol for Blend-
additional information on alternative fuels containing ethanol.
ing with Gasolines for Use asAutomotive Spark-Ignition
1.5 The values stated in SI units are to be regarded as the
Engine Fuel
standard. The values given in parentheses are for information
D4814Specification for Automotive Spark-Ignition Engine
only.
Fuel
D4953Test Method for Vapor Pressure of Gasoline and
1
This specification is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is under the direct responsibility of
2
Subcommittee D02.A0.02 on Oxygenated Fuels and Components. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 1, 2012. Published February 2013. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1996. Last previous edition approved in 2011 as D5798–11. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D5798-12. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D5798−12
Gasoline-Oxygenate Blends (Dry Method) 3.2.4 gasoline, n—a volatile mixture of liquid
D5190Test Method for Vapor Pressure of
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5798 − 11 D5798 − 12
Standard Specification for
Ethanol Fuel Blends for Flexible-Fuel Automotive Spark-
1
Ignition Engines
This standard is issued under the fixed designation D5798; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*
1.1 This specification covers the requirements for automotive fuel blends of ethanol and gasoline for use in ground vehicles
equipped with flexible-fuel spark-ignition engines. Fuel produced to this specification contains 51 to 83 volume % ethanol. This
fuel is for use in flexible-fuel vehicles and is sometimes referred to at retail as “Ethanol Flex-Fuel.” Appendix X1 discusses the
significance of the properties specified.
1.2 The vapor pressure of ethanol fuel blends is varied for seasonal climatic changes. Vapor pressure is increased at lower
temperatures to ensure adequate flexible-fuel vehicle operability. Ethanol content and selection of hydrocarbon blendstock are
adjusted by the blender to meet these vapor pressure requirements. Hydrocarbon blendstocks for meeting ethanol fuel blends
performance requirements are unleaded gasoline, gasoline blendstocks for oxygenate blending (BOBs), natural gasoline or other
hydrocarbons in the gasoline boiling range.
1.3 This specification formerly covered Fuel Ethanol (Ed70-Ed85) for Automotive Spark-Ignition Engines, also known
commercially as E85. The nomenclature “fuel ethanol” has been changed to “ethanol fuel blends” to distinguish this product from
denatured fuel ethanol Specification D4806. To facilitate blending of ethanol fuel blends that meet seasonal vapor pressure
requirements, a new lower minimum ethanol content has been established.
1.4 The United States government has established various programs for alternative fuels. Many of the definitions of alternative
fuel used by these programs may be more restrictive than the requirements of this specification. See 4.1.2.1 for additional
information on alternative fuels containing ethanol.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 The following safety hazard caveat pertains only to the test method portion, 8.1.8, of this specification. 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
2
2.1 ASTM Standards:
D86 Test Method for Distillation of Petroleum Products at Atmospheric Pressure
D130 Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test
D381 Test Method for Gum Content in Fuels by Jet Evaporation
D525 Test Method for Oxidation Stability of Gasoline (Induction Period Method)
D1613 Test Method for Acidity in Volatile Solvents and Chemical Intermediates Used in Paint, Varnish, Lacquer, and Related
Products
D1688 Test Methods for Copper in Water
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4175 Terminology Relating to Petroleum, Petroleum Products, and Lubricants
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
1
This specification is under the jurisdiction of ASTM Committee D02 on Petroleum Products and Lubricants and is under the direct responsibility of Subcommittee
D02.A0.02 on Oxygenated Fuels and Components.
Current edition approved June 1, 2011Dec. 1, 2012. Published July 2011February 2013. Originally approved in 1996. Last previous edition approved in 20102011 as
D5798–10a.–11. DOI: 10.1520/D5798-11.10.1520/D5798-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D5798 − 12
D4306 Practice for Aviation Fuel Sample Containers for Tests Affected by Trace
...
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