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ASTM D2598-96(2001)

(Practice)

Standard Practice for Calculation of Certain Physical Properties of Liquefied Petroleum (LP) Gases from Compositional Analysis

Standard Practice for Calculation of Certain Physical Properties of Liquefied Petroleum (LP) Gases from Compositional Analysis

SCOPE
1.1 This practice covers, by compositional analysis, the approximate determination of the following physical characteristics of commercial propane and special-duty propane (covered by Specification D 1835): vapor pressure, relative density, and motor octane number (MON).
1.2 This practice is not applicable to any product exceeding specifications for nonvolatile residues. (See Test Method D 2158.)
1.3 For calculating motor octane number, this practice is applicable only to mixtures containing 20 % or less of propene.
1.4 For calculated motor octane number in method, this practice is based on mixtures containing only components shown in .
1.5 The values stated in SI units are to be regarded as the standard.

General Information

Status
Historical
Publication Date
09-Apr-2002
ICS
75.160.30 - Gaseous fuels
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.H0 - Liquefied Petroleum Gas
Current Stage
Ref Project

Relations

Replaced By
ASTM D2598-02 - Standard Practice for Calculation of Certain Physical Properties of Liquefied Petroleum (LP) Gases from Compositional Analysis
Effective Date
10-Apr-2002
Referred By
ASTM D6667-21 - Standard Test Method for Determination of Total Volatile Sulfur in Gaseous Hydrocarbons and Liquefied Petroleum Gases by Ultraviolet Fluorescence
Effective Date
10-Apr-2002
Referred By
ASTM F2201-20 - Standard Consumer Safety Specification for Utility Lighters
Effective Date
10-Apr-2002
Referred By
ASTM D1835-22 - Standard Specification for Liquefied Petroleum (LP) Gases
Effective Date
10-Apr-2002
Referred By
ASTM F400-20 - Standard Consumer Safety Specification for Lighters
Effective Date
10-Apr-2002
Referred By
ASTM D7756-19 - Standard Test Method for Residues in Liquefied Petroleum (LP) Gases by Gas Chromatography with Liquid, On-Column Injection
Effective Date
10-Apr-2002
Referred By
ASTM D2163-23e1 - Standard Test Method for Determination of Hydrocarbons in Liquefied Petroleum (LP) Gases and Propane/Propene Mixtures by Gas Chromatography
Effective Date
10-Apr-2002

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ASTM D2598-96(2001) - Standard Practice for Calculation of Certain Physical Properties of Liquefied Petroleum (LP) Gases from Compositional AnalysisASTM D2598-96(2001) - Standard Practice for Calculation of Certain Physical Properties of Liquefied Petroleum (LP) Gases from Compositional Analysis
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ASTM D2598-96(2001) - Standard Practice for Calculation of Certain Physical Properties of Liquefied Petroleum (LP) Gases from Compositional Analysis
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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.
An American National Standard
Designation: D 2598 – 96 (Reapproved 2001)
Standard Practice for
Calculation of Certain Physical Properties of Liquefied
Petroleum (LP) Gases from Compositional Analysis
This standard is issued under the fixed designation D 2598; 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.
TABLE 1 Factors for Determining the Physical Characteristics of
1. Scope
A
LP-Gases
1.1 This practice covers, by compositional analysis, the
Vapor Pressure
Relative
approximate determination of the following physical charac-
Factor, kPa MON Blend
Component Density at
teristics of commercial propane and special-duty propane
(psig) at 37.8°C Value
15.6°C (60°F)
(100°F)
(covered by Specification D 1835): vapor pressure, relative
Ethane 4826 (700) 0.35618 100.7
density, and motor octane number (MON).
Propane 1200 (174) 0.50699 97.1
1.2 This practice is not applicable to any product exceeding
Propene 1469 (213) 0.52095 84.9
specifications for nonvolatile residues. (See Test Method
n-Butane 255 (37) 0.58401 89.6
i-Butane 400 (58) 0.56287 97.6
D 2158.)
A
1.3 For calculating motor octane number, this practice is Constants for vapor pressure and motor octanes are empirical values to be
used only in the calculation procedures described in this test method.
applicable only to mixtures containing 20 % or less of propene.
1.4 For calculated motor octane number in method, this
the analysis (expressed in liquid volume percent), the vapor
practice is based on mixtures containing only components
pressure, relative density, and motor octane number of the
shown in Table 1.
sample may be determined.
1.5 The values stated in SI units are to be regarded as the
3.2 Conversion of a compositional analysis from mole,
standard.
gas-volume, or weight basis to liquid-volume is obtained by
using Test Method D 2421 or other suitable method.
2. Referenced Documents
2.1 ASTM Standards:
4. Significance and Use
D 1267 Test Method for Vapor Pressure of Liquefied Petro-
2 4.1 Vapor pressure is an important specification property of
leum (LP) Gases (LP-Gas Method)
commercial propane and special duty propane that assures
D 1657 Test Method for Density or Relative Density of
2 adequate vaporization, safety, and compatibility with commer-
Liquid Hydrocarbons by Pressure Thermohydrometer
cial appliances. Relative density, while not a specification
D 1835 Specification for Liquefied Petroleum (LP) Gases
criterion, is necessary for determination of filling densities and
D 2158 Test Method for Residues in Liquefied Petroleum
custody transfer. The motor octane number (MON) is useful in
(LP) Gases
determining the products’ suitability as a fuel for internal
D 2163 Test Method for Analysis of Liquefied Petroleum
combustion engines.
(LP) Gases and Propane Concentrates by Gas Chromatog-
raphy
5. Calculation
D 2421 Practice for Interconversion of Analysis of C and
5.1 Calculated LP-Gas Vapor Pressure (see Test Method
Lighter Hydrocarbons to Gas-Volume, Liquid-Volume, or
D 1267):
Weight Base
5.1.1 Calculate the partial gage vapor pressure due to each
component in the mixture as follows:
3. Summary of Practice
Partial gage vapor pressure 5 ~vp8 3C!/100 (1)
3.1 The composition of a sample of LP-gas is obtained by
using Test Method D 2163 or other accep
...

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SIGNIFICANCE AND USE
4.1 Vapor pressure is an important specification property of commercial propane, special duty propane, propane/butane mixtures, and commercial butane that assures adequate vaporization, safety, and compatibility with commercial appliances. Relative density, while not a specification criterion, is necessary for determination of filling densities and custody transfer. The motor octane number (MON) is useful in determining the products' suitability as a fuel for internal combustion engines.
SCOPE
1.1 This practice covers, by compositional analysis, the approximate determination of the following physical characteristics of commercial propane, special-duty propane, commercial propane/butane mixtures, and commercial butane (covered by Specification D1835): vapor pressure, relative density, and motor octane number (MON).  
1.1.1 This practice is not applicable to any product exceeding specifications for nonvolatile residues. (See Test Method D2158.)  
1.1.2 For calculating motor octane number, this practice is applicable only to mixtures containing 20 % or less of propene.  
1.1.3 For calculated motor octane number, this practice is based on mixtures containing only components shown in Table 1.  
1.2 The values stated in SI units are to be regarded as standard.  
1.2.1 Exceptions:  
1.2.1.1 Non-SI units in parentheses are given for information only.
1.2.1.2 Motor octane number and relative density are given in MON numbers and dimensionless units, respectively.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Standard Test Method for Determination of Total Volatile Sulfur in Gaseous Hydrocarbons and Liquefied Petroleum Gases by Ultraviolet Fluorescence

SIGNIFICANCE AND USE
4.1 The sulfur content of LPG, used for fuel purposes, contributes to SOx emissions and can lead to corrosion in engine and exhaust systems. Some process catalysts used in petroleum and chemical refining can be poisoned by sulfur bearing materials in the feed stocks. This test method can be used to determine sulfur in process feeds, to measure sulfur in finished products, and can also be used for compliance determinations when acceptable to a regulatory authority.
SCOPE
1.1 This test method covers the determination of total volatile sulfur in gaseous hydrocarbons and liquefied petroleum (LP) gases. It is applicable to analysis of natural, processed, and final product materials. Precision has been determined for sulfur in gaseous hydrocarbons in the range of 1 mg/kg to 100 mg/kg and for sulfur in LP gases in the range of 1 mg/kg to 196 mg/kg (Note 1).
Note 1: An estimate of pooled limit of quantification (PLOQ), information regarding sample stability and other general information derived from the interlaboratory studies on precision can be referenced in the ASTM research reports.2,3  
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1.3 This test method is applicable for total volatile sulfur determination in LP gases containing less than 0.35 % (mass/mass) halogen(s).  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See 3.1 and Sections 6 and 7 for specific warning statements.  
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