ASTM D1070-03(2010)
(Test Method)Standard Test Methods for Relative Density of Gaseous Fuels
Standard Test Methods for Relative Density of Gaseous Fuels
SIGNIFICANCE AND USE
These test methods provide accurate and reliable methods to measure the relative density of gaseous fuels on an intermittent or continuous basis. These measurements are frequently used for regulatory or contract compliance custody transfer and process control.
SCOPE
1.1 These test methods cover the determination of relative density of gaseous fuels, including liquefied petroleum gases, in the gaseous state at normal temperatures and pressures. The test methods specified are sufficiently varied in nature so that one or more may be used for laboratory, control, reference, gas measurement, or in fact, for any purpose in which it is desired to know the relative density of gas or gases as compared to the density of dry air at the same temperature and pressure.
1.2 The procedures appear in the following sections:
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D1070 − 03 (Reapproved 2010)
Standard Test Methods for
1
Relative Density of Gaseous Fuels
This standard is issued under the fixed designation D1070; 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.
1. Scope 3. Terminology
1.1 These test methods cover the determination of relative 3.1 Definitions:
density of gaseous fuels, including liquefied petroleum gases,
3.1.1 density—mass per unit of volume of the fuel gas or air
in the gaseous state at normal temperatures and pressures. The
being considered.
test methods specified are sufficiently varied in nature so that
3.1.2 gaseous fuel—material to be tested, as sampled, with-
one or more may be used for laboratory, control, reference, gas
out change of composition by drying or otherwise.
measurement, or in fact, for any purpose in which it is desired
3.1.3 relative density—ratio of the density of the gaseous
to know the relative density of gas or gases as compared to the
fuel, under the observed conditions of temperature and
density of dry air at the same temperature and pressure.
pressure, to the density of dried air, of normal carbon dioxide
1.2 The procedures appear in the following sections:
content, at the same temperature and pressure.
Section
3.1.3.1 Discussion—In these test methods the term “relative
Method A, Ac-Me Gravity Balance 7–9
Method B, Ranarex Recording and Indicating Gravitometer 10-11 density” has replaced the term “specific gravity.” The term,
Method C, UGC Gravitometer 12–14
specific gravity, as used in a previous edition of these test
NOTE 1—The test methods and apparatus described herein are repre- methods, was used incorrectly.
sentative of methods and apparatus used broadly in industry. Manufactur-
3.1.4 relative humidity—ratio of actual pressure of existing
er’s instructions for specific models should be consulted for further details
water vapor to maximum possible pressure of water vapor in
and as supplements to the information presented here. In addition to
instrumentation described below additional equally accurate and satisfac-
the atmosphere at the same temperature, expressed as a
tory instruments may be available.
percentage.
1.3 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical 4. Summary of Test Methods
conversions to SI units that are provided for information only
4.1 Displacement Balances—This test method is based on
and are not considered standard.
the balancing of the weight of a fixed volume of gas at
1.4 This standard does not purport to address all of the
atmospheric pressure against the weight of dry air across the
safety concerns, if any, associated with its use. It is the
center of gravity of a balance beam. The amount of this
responsibility of the user of this standard to establish appro-
“deflection,” subject to correction, for humidity, high CO
2
priate safety and health practices and determine the applica-
content or other factor measures the relative density. Instru-
bility of regulatory limitations prior to use.
ments of this class may be either visual or chart recording.
4.2 Kinetic Energy—This test method measures the ratio of
2. Referenced Documents
the change in kinetic energy between an impeller and an
2.1 ASTM Standards:
impulse wheel operating in gas and a second impeller and
D5503 Practice for Natural Gas Sample-Handling and Con-
impulse wheel operating in a reference gas (generally air). The
2
ditioning Systems for Pipeline Instrumentation
relative torque of the impulse wheels is measured and provides
a value for relative density since the relative torque is propor-
tional to the gas and air densities.
1
These test methods are under the jurisdiction of ASTM Committee D03 on
Gaseous Fuels and is the direct responsibility of Subcommittee D03.03 on
Determination of Heating Value and Relative Density of Gaseous Fuels. 5. Significance and Use
CurrenteditionapprovedMay1,2010.PublishedJuly2010.Originallyapproved
5.1 These test methods provide accurate and reliable meth-
in 1952. Last previous edition approved in 2003 as D1070 – 03 . DOI: 10.1520/
D1070-03R10.
ods to measure the relative density of gaseous fuels on an
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
intermittent or continuous basis. These measurements are
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
frequently used for regulatory or contract compliance custody
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. transfer and process control.
Copyright © ASTM Internati
...
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