ASTM D5287-97(2002)
(Practice)Standard Practice for Automatic Sampling of Gaseous Fuels
Standard Practice for Automatic Sampling of Gaseous Fuels
SIGNIFICANCE AND USE
This practice should be used when and where a representative sample is required. A representative sample is necessary for accurate billing in custody transfer transactions.
This practice is not intended to preempt existing contract agreements.
Principles pertinent to this practice may be applied in most contractual agreements.
SCOPE
1.1 This practice covers the collection of natural gases and their synthetic equivalents using an automatic sampler.
1.2 This practice applies only to single-phase gas mixtures that vary in composition. A representative sample cannot be obtained from a two-phase stream.
1.3 This practice includes the selection, installation, and maintenance of automatic sampling systems.
1.4 This practice does not include the actual analysis of the acquired sample. Other applicable ASTM standards, such as Test Method D 1945, should be referenced to acquire that information.
1.5 The selection of the sampling system is dependent on several interrelated factors. These factors include source dynamics, operating conditions, cleanliness of the source gases, potential presence of moisture and hydrocarbon liquids, and trace hazardous components. For clean, dry gas sources, steady source dynamics, and normal operating conditions, the system can be very simple. As the source dynamics become more complex and the potential for liquids increases, or trace hazardous components become present, the complexity of the system selected and its controlling logic must be increased. Similarly, installation, operation, and maintenance procedures must take these dynamics into account.
1.6 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.7 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
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Designation:D5287–97 (Reapproved 2002)
Standard Practice for
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Automatic Sampling of Gaseous Fuels
This standard is issued under the fixed designation D 5287; 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 2.2 Other Standards:
AGA Report Number 7 Measurement of Gas by Turbine
1.1 This practice covers the collection of natural gases and
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Meters
their synthetic equivalents using an automatic sampler.
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API 14.3 Part 2 (AGA Report Number 3)
1.2 This practice applies only to single-phase gas mixtures
GPA Standard 2166 Methods of Obtaining Natural Gas
that vary in composition. A representative sample cannot be
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Samples for Analysis by Gas Chromatography
obtained from a two-phase stream.
NACE Standard MR-01-75 Standard Material Require-
1.3 This practice includes the selection, installation, and
ments. Sulfide Stress Cracking Resistant-Metallic Materi-
maintenance of automatic sampling systems.
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als for Oilfield Equipment
1.4 This practice does not include the actual analysis of the
2.3 Federal Documents:
acquired sample. Other applicable ASTM standards, such as
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Code of Federal Regulations, Title 49, 173, 34(e), p. 389
Test Method D 1945, should be referenced to acquire that
information.
3. Terminology
1.5 The selection of the sampling system is dependent on
3.1 Definitions of Terms Specific to This Standard:
several interrelated factors. These factors include source dy-
3.1.1 automaticsampler—(seeFig.1(a)and(b))amechani-
namics, operating conditions, cleanliness of the source gases,
cal system, composed of a sample probe, sample loop, sample
potential presence of moisture and hydrocarbon liquids, and
extractor, sample vessel, and the necessary logic circuits to
trace hazardous components. For clean, dry gas sources, steady
control the system throughout a period of time, the purpose of
source dynamics, and normal operating conditions, the system
which is to compile representative samples in such a way that
can be very simple. As the source dynamics become more
the final collection is representative of the composition of the
complex and the potential for liquids increases, or trace
gas stream.
hazardous components become present, the complexity of the
3.1.2 representative sample—a volume of gas that has been
system selected and its controlling logic must be increased.
obtained in such a way that the composition of this volume is
Similarly, installation, operation, and maintenance procedures
the same as the composition of the gas stream from which it
must take these dynamics into account.
was taken.
1.6 The values stated in inch-pound units are to be regarded
3.1.3 retrograde condensation—the formation of liquid
as the standard. The values given in parentheses are for
phase by pressure drop at constant temperature on a dew-point
information only.
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gas stream.
1.7 This standard does not purport to address all of the
3.1.4 sample extractor—a device to remove the sample
safety concerns, if any, associated with its use. It is the
from the sample loop and put it into the sample vessel.
responsibility of the user of this standard to establish appro-
3.1.5 sample loop—the valve, tubing, or manifold(s), or
priate safety and health practices and determine the applica-
combination thereof, used for conducting the gas stream from
bility of regulatory limitations prior to use.
the probe to the sampling device and back to the source pipe
2. Referenced Documents (or atmosphere).
2.1 ASTM Standards:
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Available from American Gas Association, 400 N. Capitol St. N.W., Washing-
D 1945 Test Method for Analysis of Natural Gas by Gas
2 ton, DC 20001.
Chromatography
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Available from the American National Standards Institute, 25 W. 43rd St., 4th
Floor, New York, NY 10036.
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Available from Gas Processors Assn, 6526 E. 60th St., Tulsa, OK 74145.
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This practice is under the jurisdiction of ASTM Committee D03 on Gaseous AvailablefromNationalAssociationofCorrosionEngineers,1440SouthCreek
Fuels and is the direct responsibility of Subcommittee D03.01 on Collection and Dr., Houston, TX 77084.
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Measurement of Gaseous Samples. Available from Superintendent of Documents, Government Printing Office,
Current edition approved Nov. 10, 2002. Published May 2003. Originally Washington, DC 20402.
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approved in 1992. Last previous edition approved in 2002 as D 5287 – 97 (2002). Bergman, D. F., Tek, M. R., and Katz, D. L., Retrograde Condensation in
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Annual Book of ASTM Standards, Vol 05.06. Natural Gas Pipelines, American Gas Association, Arlington, VA, 1975.
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