ASTM D3700-21
(Practice)Standard Practice for Obtaining LPG Samples Using a Floating Piston Cylinder
Standard Practice for Obtaining LPG Samples Using a Floating Piston Cylinder
SIGNIFICANCE AND USE
5.1 This practice allows the collection of a representative sample of LPG that may contain trace volatile dissolved components such as methane, ethane, and nitrogen. Sampling by Practice D1265 can result in a small, but predictable, loss of these lighter components. Practice D1265 is suitable for collecting samples for routine specification testing, as the small loss of light components is not significant under Specification D1835 specification requirements. Practice D3700 is recommended whenever highly accurate determination of light components is required. For example, compositions determined on samples collected according to Practice D3700 may be used to establish the product value of NGL mixtures (see Appendix X1).
SCOPE
1.1 This practice covers the equipment and procedures for obtaining a representative sample of liquefied petroleum gas (LPG), such as specified in ASTM Specification D1835, GPA 2140, and comparable international standards. It may also be used for other natural gas liquid (NGL) products that are normally single phase (for example, NGL mix, field butane, and so forth), defined in other industry specifications or contractual agreements, and for volatile (higher vapor pressure) crude oils.
Note 1: Some floating piston cylinders have such tight piston seals that the vapor pressure of some high vapor pressure crude oils may not be sufficient to allow sampling without a handle to move the piston. An alternative sampling practice for UN Class 3 liquids (under 300 kPa at 52 °C) is Practice D8009, which utilizes a Manual Piston Cylinder (MPC) sampler.
1.2 This practice is not intended for non-specification products that contain significant quantities of undissolved gases (N2, CO2), free water or other separated phases, such as raw or unprocessed gas/liquids mixtures and related materials. The same equipment can be used for these purposes, but additional precautions are generally needed to obtain representative samples of multi-phase products (see Appendix X1).
1.3 This practice includes recommendations for the location of a sample point in a line or vessel. It is the responsibility of the user to ensure that the sampling point is located so as to obtain a representative sample.
1.4 The values stated in SI units are to be regarded as standard.
1.4.1 Exception—The values given in parentheses are for information only.
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.
1.6 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.
General Information
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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: D3700 − 21
Standard Practice for
1
Obtaining LPG Samples Using a Floating Piston Cylinder
This standard is issued under the fixed designation D3700; 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* 1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This practice covers the equipment and procedures for
ization established in the Decision on Principles for the
obtaining a representative sample of liquefied petroleum gas
Development of International Standards, Guides and Recom-
(LPG), such as specified in ASTM Specification D1835,GPA
mendations issued by the World Trade Organization Technical
2140, and comparable international standards. It may also be
Barriers to Trade (TBT) Committee.
used for other natural gas liquid (NGL) products that are
normally single phase (for example, NGL mix, field butane,
2. Referenced Documents
and so forth), defined in other industry specifications or
2
2.1 ASTM Standards:
contractual agreements, and for volatile (higher vapor pres-
D1265 Practice for Sampling Liquefied Petroleum (LP)
sure) crude oils.
Gases, Manual Method
NOTE 1—Some floating piston cylinders have such tight piston seals
D1835 Specification for Liquefied Petroleum (LP) Gases
that the vapor pressure of some high vapor pressure crude oils may not be
D4175 Terminology Relating to Petroleum Products, Liquid
sufficient to allow sampling without a handle to move the piston. An
alternative sampling practice for UN Class 3 liquids (under 300 kPa at
Fuels, and Lubricants
52 °C) is Practice D8009, which utilizes a Manual Piston Cylinder (MPC)
D8009 Practice for Manual Piston Cylinder Sampling for
sampler.
Volatile Crude Oils, Condensates, and Liquid Petroleum
1.2 This practice is not intended for non-specification prod-
Products
3
ucts that contain significant quantities of undissolved gases
2.2 GPA Midstream Association Standards:
(N ,CO ), free water or other separated phases, such as raw or
GPA 2140 Liquefied Petroleum Gas Specifications and Test
2 2
unprocessed gas/liquids mixtures and related materials. The
Methods
same equipment can be used for these purposes, but additional
GPA 2174 Obtaining Liquid Hydrocarbon Samples for
precautions are generally needed to obtain representative
Analysis by Gas Chromatography
samples of multi-phase products (see Appendix X1).
3. Terminology
1.3 This practice includes recommendations for the location
3.1 Definitions:
of a sample point in a line or vessel. It is the responsibility of
3.1.1 For definitions of terms used in this practice, refer to
the user to ensure that the sampling point is located so as to
Terminology D4175.
obtain a representative sample.
3.1.2 floating piston cylinder (FPC), n—a high pressure
1.4 The values stated in SI units are to be regarded as
sample container, with a free floating internal piston that
standard.
effectively divides the container into two separate compart-
1.4.1 Exception—The values given in parentheses are for
ments.
information only.
3.1.2.1 Discussion—A floating piston cylinder is used to
collect a sample of liquid under pressure without the formation
1.5 This standard does not purport to address all of the
of a gaseous phase which can result in changes in the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- composition of the liquid sample.
priate safety, health, and environmental practices, and deter-
3.1.3 maximum fill volume (reduced fill volume), n—the
mine the applicability of regulatory limitations prior to use.
volumeofacontainerthatmaybesafelyoccupiedbytheliquid
sample, usually expressed as a percentage of the total capacity.
1 2
This practice is under the jurisdiction of ASTM Committee D02 on Petroleum For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcom- contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
mittee D02.H0 on Liquefied Petroleum Gas. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Dec. 1, 2021. Published December 2021. Originally the ASTM website.
3
approved in 1978. Last previous edition approved in 2016 as D3700 – 16. DOI: Available from GPA Midstream Association, 6526 E. 60th St., Tulsa, OK
10.1520/D3700-21. 74145, www.gpaglobal.o
...
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: D3700 − 16 D3700 − 21
Standard Practice for
1
Obtaining LPG Samples Using a Floating Piston Cylinder
This standard is issued under the fixed designation D3700; 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*
1.1 This practice covers the equipment and procedures for obtaining a representative sample of liquefied petroleum gas (LPG),
such as specified in ASTM Specification D1835, GPA 2140, and comparable international standards. It may also be used for other
natural gas liquid (NGL) products that are normally single phase (for example, NGL mix, field butane, and so forth), defined in
other industry specifications or contractual agreements, and for volatile (higher vapor pressure) crude oils.
NOTE 1—Some floating piston cylinders have such tight piston seals that the vapor pressure of some high vapor pressure crude oils may not be sufficient
to allow sampling without a handle to move the piston. An alternative sampling practice for UN Class 3 liquids (under 300 kPa at 52 °C) is Practice
D8009, which utilizes a Manual Piston Cylinder (MPC) sampler.
1.2 This practice is not intended for non-specification products that contain significant quantities of undissolved gases (N , CO ),
2 2
free water or other separated phases, such as raw or unprocessed gas/liquids mixtures and related materials. The same equipment
can be used for these purposes, but additional precautions are generally needed to obtain representative samples of multi-phase
products (see Appendix X1).
1.3 This practice includes recommendations for the location of a sample point in a line or vessel. It is the responsibility of the user
to ensure that the sampling point is located so as to obtain a representative sample.
1.4 The values stated in SI units are to be regarded as standard.
1.4.1 Exception—The values given in parentheses are for information only.
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 safety, health, and healthenvironmental practices, and determine the
applicability of regulatory limitations prior to use.
1.6 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D1265 Practice for Sampling Liquefied Petroleum (LP) Gases, Manual Method
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.H0 on Liquefied Petroleum Gas.
Current edition approved Oct. 1, 2016Dec. 1, 2021. Published October 2016December 2021. Originally approved in 1978. Last previous edition approved in 20142016
as D3700 – 14.16. DOI: 10.1520/D3700-16.10.1520/D3700-21.
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
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D3700 − 21
D1835 Specification for Liquefied Petroleum (LP) Gases
D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants
D8009 Practice for Manual Piston Cylinder Sampling for Volatile Crude Oils, Condensates, and Liquid Petroleum Products
3
2.2 GPA Midstream Association Standards:
GPA 2140 Liquefied Petroleum Gas Specifications and Test Methods
GPA 2174 Obtaining Liquid Hydrocarbon Samples for Analysis by Gas Chromatography
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms used in this practice, refer to Terminology D4175.
3.1.2 floating piston cylinder (FPC), n—a high pressure sample container, with a free floating internal piston that effectively
divides the container into two separate compartments.
3.1.2.1 Discussion—
A floating piston cylin
...
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