ASTM D6849-22
(Practice)Standard Practice for Storage and Use of Liquefied Petroleum Gases (LPG) in Sample Cylinders for LPG Test Methods
Standard Practice for Storage and Use of Liquefied Petroleum Gases (LPG) in Sample Cylinders for LPG Test Methods
SIGNIFICANCE AND USE
5.1 LPG samples can change composition during storage and use from preferential vaporization of lighter (lower molecular weight) hydrocarbon components, dissolved inert gases (N2, Ar, He, and so forth) and other dissolved gases/liquids (NH3, CO2, H2S, H2O, etc.). Careful selection of cylinder type, cylinder volume, and use of inert gas for pressurizing cylinders is required to ensure that composition changes are small enough to maintain the integrity of LPG when used as a QC reference material for various LPG test methods.
5.2 Monitoring of ongoing precision and bias on QC materials using control chart techniques in accordance with Practice D6299 can be used to establish the need for calibration or maintenance.
SCOPE
1.1 This practice covers information for the storage and use of LPG samples in standard cylinders of the type used in sampling method, Practice D1265 and floating piston cylinders used in sampling method, Practice D3700.
1.2 This practice is especially applicable when the LPG sample is used as a quality control (QC) reference material for LPG test methods, such as gas chromatography (GC) analysis (Test Method D2163) or vapor pressure (Test Method D6897) that use only a few mL per test, since relatively small portable Department of Transportation (DOT) cylinders (for example, 20 lb common barbecue cylinders, or common Mower/Forklift cylinders) can be used.
1.2.1 Modification of the pressure relief (QCC1) valve on single access port cylinders may prohibit the collection or transport of cylinders outside of permitted facilities such as refineries, gas plants or pipeline stations. No modification is generally required for multi-port mower/forklift cylinders that have a separate access port for pressure relief and additional access ports for filling, liquid/vapor withdrawal or liquid level indication. Consult the Authority having Jurisdiction for detailed regional regulatory requirements for transport of LPG in pressurized cylinders.
1.3 This practice can be applied to other test methods. However, test methods that require a large amount of sample per test (for example, manual vapor pressure Test Method D1267) will require QC volumes in excess of 1000 L if stored in standard DOT cylinders or American Society of Mechanical Engineers (ASME) vessels.
1.3.1 Test methods for trace materials that may be sensitive to vessel surfaces (for example H2O, H2S/sulfur, or trace residues) could preferably use aluminum, stainless steel or internally coated vessels to minimize surface absorption/reaction or larger vessels to minimize surface/volume ratio.
1.4 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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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.
Designation: D6849 −22
Standard Practice for
Storage and Use of Liquefied Petroleum Gases (LPG) in
1
Sample Cylinders for LPG Test Methods
This standard is issued under the fixed designation D6849; 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* 1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This practice covers information for the storage and use
ization established in the Decision on Principles for the
of LPG samples in standard cylinders of the type used in
Development of International Standards, Guides and Recom-
sampling method, Practice D1265 and floating piston cylinders
mendations issued by the World Trade Organization Technical
used in sampling method, Practice D3700.
Barriers to Trade (TBT) Committee.
1.2 This practice is especially applicable when the LPG
sample is used as a quality control (QC) reference material for 2. Referenced Documents
2
LPG test methods, such as gas chromatography (GC) analysis
2.1 ASTM Standards:
(Test Method D2163) or vapor pressure (Test Method D6897)
D1265 Practice for Sampling Liquefied Petroleum (LP)
that use only a few mL per test, since relatively small portable
Gases, Manual Method
Department of Transportation (DOT) cylinders (for example,
D1267 Test Method for Gauge Vapor Pressure of Liquefied
20 lb common barbecue cylinders, or common Mower/Forklift
Petroleum (LP) Gases (LP-Gas Method)
cylinders) can be used.
D2163 Test Method for Determination of Hydrocarbons in
1.2.1 Modification of the pressure relief (QCC1) valve on
Liquefied Petroleum (LP) Gases and Propane/Propene
single access port cylinders may prohibit the collection or
Mixtures by Gas Chromatography
transport of cylinders outside of permitted facilities such as
D3700 Practice for Obtaining LPG Samples Using a Float-
refineries, gas plants or pipeline stations. No modification is
ing Piston Cylinder
generally required for multi-port mower/forklift cylinders that
D6299 Practice for Applying Statistical Quality Assurance
have a separate access port for pressure relief and additional
and Control Charting Techniques to Evaluate Analytical
access ports for filling, liquid/vapor withdrawal or liquid level
Measurement System Performance
indication. Consult the Authority having Jurisdiction for de-
D6897 Test Method for Vapor Pressure of Liquefied Petro-
tailed regional regulatory requirements for transport of LPG in
leum Gases (LPG) (Expansion Method)
pressurized cylinders.
3. Terminology
1.3 This practice can be applied to other test methods.
3.1 Definitions:
However, test methods that require a large amount of sample
3.1.1 floating piston cylinder (FPC), n—high-pressure
per test (for example, manual vapor pressure Test Method
sample container with a free-floating internal piston that
D1267) will require QC volumes in excess of 1000 L if stored
effectively divides the container into two separate compart-
in standard DOT cylinders orAmerican Society of Mechanical
ments.
Engineers (ASME) vessels.
3.1.1.1 Discussion—A floating piston cylinder is used to
1.3.1 Test methods for trace materials that may be sensitive
collect a sample of liquid under pressure without the formation
to vessel surfaces (for example H O, H S/sulfur, or trace
2 2
of a gaseous phase which can result in changes in the
residues) could preferably use aluminum, stainless steel or
composition of the liquid sample.
internally coated vessels to minimize surface absorption/
reaction or larger vessels to minimize surface/volume ratio.
3.1.2 high-pressure sample cylinder, n—a container used for
storage and transportation of a sample obtained at pressures
above atmospheric pressure.
1
This practice is under the jurisdiction of ASTM Committee D02 on Petroleum
Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcom-
2
mittee D02.08 on Volatility. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
CurrenteditionapprovedMay1,2022.PublishedJuly2022.Originallyapproved contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
in 2002. Last previous edition approved in 2021 as D6849 – 13 (2021). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D6849-22. 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,
...
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: D6849 − 13 (Reapproved 2021) D6849 − 22
Standard Practice for
Storage and Use of Liquefied Petroleum Gases (LPG) in
1
Sample Cylinders for LPG Test Methods
This standard is issued under the fixed designation D6849; 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 Scope*
1.1 This practice covers information for the storage and use of LPG samples in standard cylinders of the type used in sampling
method, Practice D1265 and floating piston cylinders used in sampling method, Practice D3700.
1.2 This practice is especially applicable when the LPG sample is used as a quality control (QC) reference material for LPG test
methods, such as gas chromatography (GC) analysis (Test Method D2163) or vapor pressure (Test Method D6897) that use only
a few mL per test, since relatively small portable Department of Transportation (DOT) cylinders (for example, 20 lb common
barbecue cylinders, or common Mower/Forklift cylinders) can be used. This practice can be applied to other test methods.
However, test methods that require a large amount of sample per test (for example, manual vapor pressure Test Method D1267)
will require QC volumes in excess of 1000 L if stored in standard DOT cylinders or American Society of Mechanical Engineers
(ASME) vessels.
1.2.1 Modification of the pressure relief (QCC1) valve on single access port cylinders may prohibit the collection or transport of
cylinders outside of permitted facilities such as refineries, gas plants or pipeline stations. No modification is generally required for
multi-port mower/forklift cylinders that have a separate access port for pressure relief and additional access ports for filling,
liquid/vapor withdrawal or liquid level indication. Consult the Authority having Jurisdiction for detailed regional regulatory
requirements for transport of LPG in pressurized cylinders.
1.3 This practice can be applied to other test methods. However, test methods that require a large amount of sample per test (for
example, manual vapor pressure Test Method D1267) will require QC volumes in excess of 1000 L if stored in standard DOT
cylinders or American Society of Mechanical Engineers (ASME) vessels.
1.3.1 Test methods for trace materials that may be sensitive to vessel surfaces (for example H O, H S/sulfur, or trace residues)
2 2
could preferably use aluminum, stainless steel or internally coated vessels to minimize surface absorption/reaction or larger vessels
to minimize surface/volume ratio.
1.4 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.
1
This practice is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.08 on Volatility.
Current edition approved Dec. 1, 2021May 1, 2022. Published December 2021July 2022. Originally approved in 2002. Last previous edition approved in 20132021 as
D6849 – 13.D6849 – 13 (2021). DOI: 10.1520/D6849-13R21.10.1520/D6849-22.
*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
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D6849 − 22
2. Referenced Documents
2
2.1 ASTM Standards:
D1265 Practice for Sampling Liquefied Petroleum (LP) Gases, Manual Method
D1267 Test Method for Gauge Vapor Pressure of Liquefied Petroleum (LP) Gases (LP-Gas Method)
D2163 Test Method for Determination of Hydrocarbons in Liquefied Petroleum (LP) Gases and Propane/Propene Mixtures by
Gas Chromatography
D3700 Practice for Obtaining LPG Samples Using a Floating Piston Cylinder
D6299 Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measure-
ment System Performance
D6897 Test Method for Vapor Pressure of Liquefied Petroleum Gases (LPG) (Expansion Method)
3. Terminology
3.1 Definitions:
3.1.1 floating piston cylinder (FPC), n—high-pressure sample container with a free-floating internal piston that effectively divides
the container into
...
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