1、Designation: D 4651 93 (Reapproved 2003)Standard Specification forIsobutane Thermophysical Property Tables1This standard is issued under the fixed designation D 4651; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 The isobutane thermophysical property tables are foruse in the calculation of the pressure-volume-temperature(PVT), therm
3、odynamic, and transport properties of isobutanefor process design and operations. Tables are provided forgaseous and liquid isobutane at temperatures between 135 and600K at pressures to 35 MPa. These tables were developed bythe National Institute of Standards and Technology (formerlythe National Bur
4、eau of Standards) upon culmination of fouryears of effort in acquiring available physical properties data,performing experimental measurements, and in formulatingthese tables for use in thermal computations.2. Sponsorship2.1 The preparation of the tables and supporting work wasdone by the National I
5、nstitute of Standards and Technology(NIST) under the sponsorship of the Gas Research Institute, theAmerican Gas Association, and the Standard Reference DataProgram of NIST.3. Applicability3.1 These tables apply directly only to pure gaseous andliquid isobutane. However, it is expected that they will
6、 findsubstantial use in mathematical models and tables for thethermophysical properties of mixtures containing isobutane,such as natural gas.4. Tables4.1 These thermophysical property tables2are:4.1.1 Thermophysical Properties of Coexisting Gaseous andLiquid Isobutane, in SI units (Table in Appendix
7、 H, pp.722724).34.1.2 Thermophysical Properties of Isobutane, along iso-bars, in SI units (Table in Appendix H, pp. 725757).34.2 These tables were produced by equations from a com-puter package. “NIST Thermophysical Properties of FluidsDatabase 12” (also designated MIPROPS) of the StandardReference
8、Data Program of NIST.4A wide selection of units(SI units, engineering units, chemical units) are available withthis program.5. Additional Information5.1 These tables were originally published by the AmericanChemical Society and the American Institute of Physics for theNational Institute of Standards
9、 and Technology in a compre-hensive report titled “Thermophysical Properties of Fluids. II.Methane, Ethane, Propane, Isobutane and Normal Butane.”5This report also contains the following:5.1.1 Properties and uncertainties data.5.1.2 Correlation equations for isobutane.5.1.3 Description of the resear
10、ch study culminating in thetables.5.1.4 References to properties data.5.1.5 Computational methods used.1This practice is under the jurisdiction of ASTM Committee D03 on GaseousFuels and is the direct responsibility of Subcommittee D03.08 on ThermophysicalProperties.Current edition approved May 10, 2
11、003. Published May 2003. Originallyapproved in 1987. Last previous edition approved in 1998 as D 4651 93 (1998).2Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR: D031005.3Journal of Physical and Chemical Reference Data, Vol 16, 1
12、987.4Available from Standard Reference Data, National Institute of Standards andTechnology (NIST), 100 Bureau Drive, Stop 3460, Gaithersburg, MD 20899.5Younglove, B.A., and Ely, J.F. Journal of Physical and Chemical ReferenceData, Vol 16, 1987, pp. 577798. Available from the American Chemical Societ
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14、any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technic
15、al committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration
16、 at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbo
17、r Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D 4651 93 (2003)2
