Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density of Gaseous Fuels

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1.1 This practice covers procedures for calculating from compositional analyses, the following properties of natural gas mixtures: heating value, relative density and compressibility factor at base conditions (14.696 psia and 60°F).  It is applicable to all common types of utility gaseous fuels (for example, dry natural gas, reformed gases, oil gas (both high- and low-Btu), propane-air, carbureted water gas, and coke oven and retort coal gas) for which suitable methods of analysis as described in Section 6 are available. Calculation procedures for other base conditions are given.
1.2 This standard does not purport to address all of the safety problems, 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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Historical
Publication Date
09-May-1998
Current Stage
Ref Project

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ASTM D3588-98 - Standard Practice for Calculating Heat Value, Compressibility Factor, and Relative Density of Gaseous Fuels
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 3588 – 98
Standard Practice for
Calculating Heat Value, Compressibility Factor, and Relative
1
Density of Gaseous Fuels
This standard is issued under the fixed designation D 3588; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 2163 Test Method for Analysis of Liquefied Petroleum
(LP) Gases and Propane Concentrates by Gas Chromatog-
1.1 This practice covers procedures for calculating heating
5
raphy
value, relative density, and compressibility factor at base
D 2650 Test Method for Chemical Composition of Gases by
conditions (14.696 psia and 60°F (15.6°C)) for natural gas
6
2
Mass Spectrometry
mixtures from compositional analysis. It applies to all com-
2.2 GPA Standards:
mon types of utility gaseous fuels, for example, dry natural gas,
GPA 2145 Physical Constants for the Paraffin Hydrocarbons
reformed gas, oil gas (both high and low Btu), propane-air,
7
and Other Components in Natural Gas
carbureted water gas, coke oven gas, and retort coal gas, for
GPA Standard 2166 Methods of Obtaining Natural Gas
which suitable methods of analysis as described in Section 6
7
Samples for Analysis by Gas Chromatography
are available. Calculation procedures for other base conditions
GPA 2172 Calculation of Gross Heating Value, Relative
are given.
Density, and Compressibility Factor for Natural Gas
1.2 The values stated in inch-pound units are to be regarded
7,8
Mixtures from Compositional Analysis
as the standard. The SI units given in parentheses are for
GPA Standard 2261 Method of Analysis for Natural Gas and
information only.
7
Similar Gaseous Mixtures by Gas Chromatography
1.3 This standard does not purport to address all of the
GPA Technical Publication TP-17 Table of Physical Prop-
safety concerns, if any, associated with its use. It is the
erties of Hydrocarbons for Extended Analysis of Natural
responsibility of the user of this standard to establish appro-
7
Gases
priate safety and health practices and determine the applica-
7
GPSA Data Book, Fig. 23-2, Physical Constants
bility of regulatory limitations prior to use.
2.3 TRC Document:
9
2. Referenced Documents
TRC Thermodynamic Tables—Hydrocarbons
2.4 ANSI Standard:
2.1 ASTM Standards:
ANSI Z 132.1-1969: Base Conditions of Pressure and
D 1717 Methods for Analysis of Commercial Butane-
Temperature for the Volumetric Measurement of Natural
Butene Mixtures and Isobutylene by Gas Chromatogra-
,
10 11
3
Gas
phy
D 1945 Test Method for Analysis of Natural Gas by Gas
3. Terminology
4
Chromatography
3.1 Definitions:
D 1946 Practice for Analysis of Reformed Gas by Gas
4
Chromatography
1 5
This practice is under the jurisdiction of ASTM Committee D-3 on Gaseous Annual Book of ASTM Standards, Vol 05.01.
6
Fuels and is the direct responsibility of Subcommittee D03.03 on Determination of Annual Book of ASTM Standards, Vol 05.02.
7
Heating Value and Relative Density of Gaseous Fuels. Available from Gas Processors Association, 6526 E. 60th, Tulsa, OK 74145.
8
Current edition approved May 10, 1998. Published April 1999. Originally A program in either BASIC or FORTRAN suitable for running on computers,
published as D 3588 – 98. available from the Gas Processors Association, has been found satisfactory for this
2
A more rigorous calculation of Z(T,P) at both base conditions and higher purpose.
9
pressures can be made using the calculation procedures in “Compressibility and Available from Thermodynamics Research Center, The Texas A&M University,
Super Compressibility for Natural Gas and Other Hydrocarbon Gases,” American College Station, TX 77843-3111.
10
Gas Association Transmission Measurement Committee Report 8, AGA Cat. No. Available from the American National Standards Institute, 11 W. 42nd St.,
XQ1285, 1985, AGA, 1515 Wilson Blvd., Arlington, VA 22209. 13th Floor, New York, NY 10036.
3 11
Discontinued, see 1983 Annual Book of ASTM Standards, Vol 05.01. Supporting data are available from ASTM Headquarters. Request RR:D03-
4
Annual Book of ASTM Standards, Vol 05.05. 1007.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D3588–98
3.1.1 British thermal unit—the defined International Tables 3.2.1.14 a, b, c—in Eq 1, integers required to balance the
British thermal unit (Btu). equation: C, carbon; H, hydrogen; S, sulfur; O, oxygen
3.2.1.15 (id)—ideal gas st
...

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