1、Designation:D528708(Reapproved 2015)Standard Practice forAutomatic Sampling of Gaseous Fuels1This standard is issued under the fixed designation D5287;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、 in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the collection of gaseous fuels andtheir synthetic equivalents using an automatic sampler.1.2 This practice applies only to
3、single-phase gas mixtures.This practice does not address a two-phase stream.1.3 This practice includes the selection,installation,andmaintenance of automatic sampling systems.1.4 This practice does not include the actual analysis of theacquired sample.Other applicable ASTM standards,such asTest Meth
4、od D1945,should be used to acquire that informa-tion.1.5 The selection of the sampling system is dependent onseveral interrelated factors.These factors include sourcedynamics,operating conditions,cleanliness of the sourcegases,potential presence of moisture and hydrocarbon liquids,and trace hazardou
5、s components.For clean,dry gas sources,steady source dynamics,and normal operating conditions,thesystem can be very simple.As the source dynamics becomemore complex and the potential for liquids increases,or tracehazardous components become present,the complexity of thesystem selected and its contro
6、lling logic must be increased.Similarly,installation,operation,and maintenance proceduresmust take these dynamics into account.1.6 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for informa
7、tion onlyand are not considered standard.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory li
8、mitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1945 Test Method for Analysis of Natural Gas by GasChromatographyD5504 Test Method for Determination of Sulfur Compoundsin Natural Gas and Gaseous Fuels by Gas Chromatogra-phy and Chemiluminescence2.2 Other Standards:AGA Report Number
9、 7 Measurement of Gas by TurbineMeters3API 14.1 Collecting and Handling of Natural Gas Samplesfor Custody Transfer4API 14.3 Part 2(AGA Report Number 3)4GPA Standard 2166 Methods of Obtaining Natural GasSamples for Analysis by Gas Chromatography5ISO-10715 Natural GasSampling Guidelines6NACE Standard
10、MR-01-75 Standard Material Require-ments.Sulfide Stress Cracking Resistant-Metallic Materi-als for Oilfield Equipment72.3 Federal Documents:CFR 49 Code of Federal Regulations,Title 49,173,34(e),p.38983.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 automatic sampler(see Fig.1(a)
11、and(b)a mechani-cal system,composed of a sample probe,sample loop,sampleextractor,sample vessel,and the necessary logic circuits tocontrol the system throughout a period of time,the purpose of1This practice is under the jurisdiction of ASTM Committee D03 on GaseousFuels and is the direct responsibil
12、ity of Subcommittee D03.01 on Collection andMeasurement of Gaseous Samples.Current edition approved June 1,2015.Published July 2015.Originally approvedin 1992.Last previous edition approved in 2008 as D5287 08.DOI:10.1520/D5287-08R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org
13、,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American Gas Association,400 N.Capitol St.N.W.,Washington,DC 20001,http:/www.aga.org/.4Available from American Natio
14、nal Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.5Available from Gas Processors Association(GPA),6526 E.60th St.,Tulsa,OK74145,http:/.6Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,Case postale 56,CH-1211,Geneva 20,
15、Switzerland,http:/www.iso.ch.7Available from NACE International(NACE),1440 South Creek Dr.,Houston,TX 77084-4906,http:/www.nace.org.8Available from Superintendent of Documents,Government Printing Office,Washington,DC 20402.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohoc
16、ken,PA 19428-2959.United States1 which is to compile representative samples in such a way thatthe final collection is representative of the total composition ofthe gas stream for that period of time.3.1.2 representative samplea volume of gas that has beenobtained in such a way that the composition of this volume isthe same as the total composition of the gas stream from whichit was taken.3.1.3 retrograde condensationthe formation of liquidphase by pressure drop or temperature increase on a gas s