Table of Physical Properties for Hydrocarbons and Other Compounds of Interest to the Natural Gas and Natural Gas Liquids Industries

Transcription

1 GPA Midstream Standard Table of Physical Properties for Hydrocarbons and Other Compounds of Interest to the Natural Gas and Natural Gas Liquids Industries (Includes data previously published in Technical Publication TP-17, Table of Physical Properties of Hydrocarbons for Extended Analysis of Natural Gases) Adopted as a Standard 1942 Revised 2016 GPA Midstream Association Sixty Sixty American Plaza, Suite 700 Tulsa, Oklahoma 74135

2 FOREWORD This standard provides the gas processing industry with a convenient compilation of authoritative numerical values for hydrocarbons and other compounds occurring in natural gas and natural gas liquids as well as other compounds of interest to the industry. The physical properties selected are those considered most valuable for engineering and analytical computations. Most properties are based upon two NIST Standard Reference Databases: the Web Thermo Tables, WTT (NIST SRSD-3), and the Reference Fluid Thermodynamic and Transport Properties Database, REFPROP 9.1 (NIST SRD-23). The data in this publication were checked, evaluated, and recalculated when necessary by the Applied Chemicals and Materials Division of the Material Measurement Laboratory at NIST. The listed flammability limits and octane numbers were not evaluated at NIST and sources for these properties are provided in the references. Methodology The process for revising this and future versions of GPA-2145 has been updated. Current values will be used in all subsequent revisions, except when a newly accepted and confirmed equation of state or substantiated improved measurements becomes available. In these situations, the following items determine when changes will be made. a) If any property for a component falls outside the uncertainty of the new EOS or substantiated measurements, all properties will be updated for that component. b) If all existing values for a component fall within the uncertainty of the new EOS or substantiated measurements, no changes will be made. Summary of changes in this revision of GPA-2145 a) For helium, all values were updated based on a new equation of state finalized in b) For propylene, the heat capacities were updated based on the final equation of state. c) The volume of air required to burn one volume of gas has been updated to reflect the revised concentration of oxygen in air (as explained in the Properties of Air section at the end of this standard). d) The definition of relative density was modified based solely on a fixed reference value ( g/mol), not on the molar mass of air. e) The main tables now list pure fluids only; all properties for air were removed from the tables and included in the Properties of Air section at the end of this standard. f) All fluids from TP-17 were added, and properties displayed here are based on the format from that version. Most of the properties for the fluids in the 1998 version of TP-17 (excluding the fluids in ) have changed; the new values are based on properties calculated from the equations of state available in the REFPROP program (reference 2) or from the TRC database (reference 3). The main tables and the extended tables list the same properties. g) The fluids in are included here in their original format, as well as in the transposed TP-17 format. GPA 2145 Page ii

3 h) Additional properties from TP-17 are included; these are the chemical formula, acentric factor, critical density, compressibility factor at 60 F, liquid net heating value, refractive index, and temperature coefficient of density. i) Other properties now appearing in the main tables include the specific volume as an ideal gas, vapor pressure at 60 F, and summation factor for a new compressibility formula. All fluids in the GPSA Engineering Data Book are now included in this revision of GPA Property values for compounds listed here in GPA supersede those listed in the GPSA Engineering Data Book, 13 th edition, and all earlier editions. GPA 2145 Page iii

4 DISCLAIMER GPA Midstream Association publications necessarily address problems of a general nature and may be used by anyone desiring to do so. Every effort has been made by GPA Midstream to assure accuracy and reliability of the information contained in this publication. Each person who uses or refers to this publication will need to make their own decisions based on consideration of their own internal best practices, recommendations, and engineering judgment. GPA Midstream and its members do not guarantee the accuracy, completeness, efficacy, timeliness, or correct sequencing of such information, including without limitation, the reference material and information of the various other industry associations that may be provided herein. Use of the information provided in this publication is voluntary, and reliance on it should only be undertaken after an independent review of its accuracy, completeness, efficacy, timeliness, and consideration of the applicability of any local, state, and federal laws and regulations. It is not the intent of GPA Midstream to assume the duties of employers, manufacturers, or suppliers to warn and properly train employees, or others exposed, concerning health and safety risks or precautions. Reference herein to any specific commercial product, process, or service by trade name, trademark, service mark, manufacturer, or otherwise does not constitute or imply endorsement, recommendation, or favoring by GPA Midstream. GPA Midstream makes no representation, warranty, or guarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal, state or municipal regulation with which this publication may conflict, or for any infringement of letters of patent regarding apparatus, equipment, or method so covered. Copyright 2016 by GPA Midstream Association. All rights reserved. No part of this Report may be reproduced without the written consent of GPA Midstream Association. GPA 2145 Page iv

5 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Notes Compound methane ethane propane isobutane n-butane isopentane n-pentane Formula CH 4 C 2 H 6 C 3 H 8 C 4 H 10 C 4 H 10 C 5 H 12 C 5 H 12 a Molar Mass b Boiling Temperature ( F, psia) c Triple Point Temperature ( F) b Vapor Pressure 60 F (psia) F (psia) Critical Constants Temperature ( F) Pressure (psia) Density (lbm/ft3) h Acentric Factor b,d Density of Liquid (60 F, psia) Relative density (60 F/60 F) API gravity Density (lbm/gal) e Temp. coef. of density (1/ F, at 60 F sat.) f Density of Ideal Gas (60 F, psia) Relative density Volume (ft3/lbm) Density (lbm/1000 ft3) b,d,g Volume (60 F, psia) Liquid (gal/lbmol) ft3 ideal gas/gal liquid Ratio, ideal gas/liquid p Summation Factor (60 F) Z=1-P*b2 (1/psia0.5) Z=1-P/P0*b2 (P0= psia) Compressibility Factor at 60 F (sat) b,d,i Gross Heating Value (60 F, ideal reaction) Fuel as Liquid (Btu/lbm) Fuel as Liquid (Btu/gal) Fuel as Ideal gas (Btu/lbm) Fuel as Ideal gas (Btu/ft3) Fuel as Ideal gas (Btu/gal) b,d,i Net Heating Value (60 F, ideal reaction) Fuel as Liquid (Btu/lbm) Fuel as Ideal gas (Btu/ft3) j Volume of Air Required to Burn One Volume of Ideal Gas b,k Heat of Vaporization ( psia) Btu/lbm b,m Specific Heat (60 F) Cp [Btu/(lbm F)] (ideal gas) Cv [Btu/(lbm F)] (ideal gas) C [Btu/ (lbm F)] k=cp/cv n Refractive Index, nd (60 F) Flammability Limits (100 F, psia) Lower (volume % in air) Upper (volume % in air) ,o Octane Number Motor Method D Research Method D GPA 2145 Page 1

6 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Compound n-hexane n-heptane n-octane n-nonane n-decane ethylene propylene Formula C 6 H 14 C 7 H 16 C 8 H 18 C 9 H 20 C 10 H 22 C 2 H 4 C 3 H 6 Molar Mass Boiling Temperature ( F, psia) Triple Point Temperature ( F) Vapor Pressure 60 F (psia) F (psia) Critical Constants Temperature ( F) Pressure (psia) Density (lbm/ft 3 ) Acentric Factor Density of Liquid (60 F, psia) Relative density (60 F/60 F) API gravity Density (lbm/gal) Temp. coef. of density (1/ F, at 60 F sat.) Density of Ideal Gas (60 F, psia) Relative density Volume (ft 3 /lbm) Density (lbm/1000 ft 3 ) Volume (60 F, psia) Liquid (gal/lbmol) ft 3 ideal gas/gal liquid Ratio, ideal gas/liquid Summation Factor (60 F) Z=1-P*b 2 (1/psia 0.5 ) Z=1-P/P 0 *b 2 (P 0 = psia) Compressibility Factor at 60 F (sat) Gross Heating Value (60 F, ideal reaction) Fuel as Liquid (Btu/lbm) Fuel as Liquid (Btu/gal) Fuel as Ideal gas (Btu/lbm) Fuel as Ideal gas (Btu/ft 3 ) Fuel as Ideal gas (Btu/gal) Net Heating Value (60 F, ideal reaction) Fuel as Liquid (Btu/lbm) Fuel as Ideal gas (Btu/ft 3 ) Volume of Air Required to Burn One Volume of Ideal Gas Heat of Vaporization ( psia) Btu/lbm Specific Heat (60 F) C p [Btu/(lbm F)] (ideal gas) C v [Btu/(lbm F)] (ideal gas) C σ [Btu/(lbm F)] (sat. liquid) k=c p /C v Refractive Index, n D (60 F) Flammability Limits (100 F, psia) Lower (volume % in air) Upper (volume % in air) Octane Number Motor Method D Research Method D GPA 2145 Page 2

7 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Compound carbon hydrogen carbon dioxide sulfide nitrogen oxygen helium water hydrogen monoxide Formula CO 2 H 2 S N 2 O 2 He H 2 O H 2 CO Molar Mass Boiling Temperature ( F, psia) Triple Point Temperature ( F) Vapor Pressure 60 F (psia) F (psia) Critical Constants Temperature ( F) Pressure (psia) Density (lbm/ft 3 ) Acentric Factor Density of Liquid (60 F, psia) Relative density (60 F/60 F) API gravity Density (lbm/gal) Temp. coef. of density (1/ F, at 60 F sat.) Density of Ideal Gas (60 F, psia) Relative density Volume (ft 3 /lbm) Density (lbm/1000 ft 3 ) Volume (60 F, psia) Liquid (gal/lbmol) ft 3 ideal gas/gal liquid Ratio, ideal gas/liquid Summation Factor (60 F) Z=1-P*b 2 (1/psia 0.5 ) Z=1-P/P 0 *b 2 (P 0 = psia) Compressibility Factor at 60 F (sat) Gross Heating Value (60 F, ideal reaction) Fuel as Liquid (Btu/lbm) Fuel as Liquid (Btu/gal) Fuel as Ideal gas (Btu/lbm) Fuel as Ideal gas (Btu/ft 3 ) Fuel as Ideal gas (Btu/gal) Net Heating Value (60 F, ideal reaction) Fuel as Liquid (Btu/lbm) Fuel as Ideal gas (Btu/ft 3 ) Volume of Air Required to Burn One Volume of Ideal Gas Heat of Vaporization ( psia) Btu/lbm Specific Heat (60 F) C p [Btu/(lbm F)] (ideal gas) C v [Btu/(lbm F)] (ideal gas) C σ [Btu/(lbm F)] (sat. liquid) k=c p /C v Refractive Index, n D (60 F) Flammability Limits (100 F, psia) Lower (volume % in air) Upper (volume % in air) Octane Number Motor Method D-357 Research Method D-908 GPA 2145 Page 3

8 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Notes a b c b h Molar Mass Boiling Temp. Triple Point Vapor Pressure Critical Constants Acentric Factor Temp. psia 60 F 100 F Temp. Pressure Density Compound Formula F psia F psia lbm/ft 3-1 methane CH ethane C 2 H propane C 3 H isobutane C 4 H n-butane C 4 H isopentane C 5 H n-pentane C 5 H n-hexane C 6 H n-heptane C 7 H n-octane C 8 H n-nonane C 9 H n-decane C 10 H ethylene C 2 H propylene C 3 H carbon dioxide CO hydrogen sulfide H 2 S nitrogen N oxygen O helium He water H 2 O hydrogen H carbon monoxide CO hydrogen chloride HCl carbonyl sulfide COS chlorine Cl ammonia NH sulfur dioxide SO methanol CH 4 O ethanol C 2 H 6 O ethyne C 2 H ,2-propadiene C 3 H propyne C 3 H ,3-butadiene C 4 H ,2-butadiene C 4 H methylpropene C 4 H butene C 4 H (E)-2-butene C 4 H GPA 2145 Page 4

9 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Notes a b c b h Molar Mass Boiling Temp. Triple Point Vapor Pressure Critical Constants Acentric Factor Temp. psia 60 F 100 F Temp. Pressure Density Compound Formula F psia F psia lbm/ft 3-38 (Z)-2-butene C 4 H methyl-1,3-butadiene C 5 H methyl-1-butene C 5 H pentene C 5 H methyl-1-butene C 5 H (E)-2-pentene C 5 H (Z)-2-pentene C 5 H methyl-2-butene C 5 H cyclopentane C 5 H ,2-dimethylpropane C 5 H benzene C 6 H methylcyclopentane C 6 H cyclohexane C 6 H ,2-dimethylbutane C 6 H ,3-dimethylbutane C 6 H methylpentane C 6 H methylpentane C 6 H toluene C 7 H ,1-dimethylcyclopentane C 7 H trans-1,3-dimethylcyclopentane C 7 H cis-1,3-dimethylcyclopentane C 7 H trans-1,2-dimethylcyclopentane C 7 H cis-1,2-dimethylcyclopentane C 7 H Methylcyclohexane C 7 H ethylcyclopentane C 7 H cycloheptane C 7 H ,2-dimethylpentane C 7 H ,4-dimethylpentane C 7 H ,2,3-trimethylbutane C 7 H ,3-dimethylpentane C 7 H ,3-dimethylpentane C 7 H methylhexane C 7 H methylhexane C 7 H ethylpentane C 7 H styrene C 8 H ethylbenzene C 8 H p-xylene C 8 H m-xylene C 8 H GPA 2145 Page 5

10 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Notes a b c b h Molar Mass Boiling Temp. Triple Point Vapor Pressure Critical Constants Acentric Factor Temp. psia 60 F 100 F Temp. Pressure Density Compound Formula F psia F psia lbm/ft 3-76 o-xylene C 8 H ,1,3-trimethylcyclopentane C 8 H ,trans-2,cis-4-trimethylcyclopentane C 8 H r-1,t-2,c-3-trimethylcyclopentane C 8 H ,1,2-trimethylcyclopentane C 8 H ,cis-2,trans-4-trimethylcyclopentane C 8 H r-1,c-2,t-3-trimethylcyclopentane C 8 H trans-1,4-dimethylcyclohexane C 8 H ,1-dimethylcyclohexane C 8 H trans-1,3-dimethylcyclohexane C 8 H trans-1-ethyl-3-methylcyclopentane C 8 H cis-1-ethyl-3-methylcyclopentane C 8 H trans-1-ethyl-2-methylcyclopentane C 8 H ethyl-1-methylcyclopentane C 8 H ,cis-2,cis-3-trimethylcyclopentane C 8 H cis-1,4-dimethylcyclohexane C 8 H cis-1,3-dimethylcyclohexane C 8 H isopropylcyclopentane C 8 H cis-1-ethyl-2-methylcyclopentane C 8 H cis-1,2-dimethylcyclohexane C 8 H propylcyclopentane C 8 H ethylcyclohexane C 8 H cyclooctane C 8 H ,2,4-trimethylpentane C 8 H ,2-dimethylhexane C 8 H ,5-dimethylhexane C 8 H ,4-dimethylhexane C 8 H ,2,3-trimethylpentane C 8 H ,3-dimethylhexane C 8 H ,3,4-trimethylpentane C 8 H ,3-dimethylhexane C 8 H methylheptane C 8 H methylheptane C 8 H ,4-dimethylhexane C 8 H ethylhexane C 8 H methylheptane C 8 H isopropylbenzene C 9 H propylbenzene C 9 H GPA 2145 Page 6

11 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Notes a b c b h Molar Mass Boiling Temp. Triple Point Vapor Pressure Critical Constants Acentric Factor Temp. psia 60 F 100 F Temp. Pressure Density Compound Formula F psia F psia lbm/ft m-ethyltoluene C 9 H p-ethyltoluene C 9 H ,3,5-trimethylbenzene C 9 H o-ethyltoluene C 9 H ,2,4-trimethylbenzene C 9 H ,2,3-trimethylbenzene C 9 H ,1,4-trimethylcyclohexane C 9 H ,1,3-trimethylcyclohexane C 9 H r-1,c-3,c-5-trimethylcyclohexane C 9 H r-1,c-3,t-5-trimethylcyclohexane C 9 H trans,trans-1,2,4-trimethylcyclohexane C 9 H cis-1,2,trans-1,4-1,2,4-trimethylcyclohexane C 9 H r-1,t-2,c-3-trimethylcyclohexane C 9 H r-1,t-2,t-4-trimethylcyclohexane C 9 H cis-1,2,cis-1,4-1,2,4-trimethylcyclohexane C 9 H ,1,2-trimethylcyclohexane C 9 H isobutylcyclopentane C 9 H cis,cis-1,2,3-trimethylcyclohexane C 9 H cis-1,2,trans-1,3-cyclohexane C 9 H isopropylcyclohexane C 9 H butylcyclopentane C 9 H propylcyclohexane C 9 H methylcyclooctane C 9 H ,2,4,4-tetramethylpentane C 9 H ,2,5-trimethylhexane C 9 H ,2,4-trimethylhexane C 9 H ,4,4-trimethylhexane C 9 H ,3,5-trimethylhexane C 9 H ,4-dimethylheptane C 9 H ,2-dimethylheptane C 9 H ,2,3-trimethylhexane C 9 H ,6-dimethylheptane C 9 H ,5-dimethylheptane C 9 H ,5-dimethylheptane C 9 H ,3-dimethylheptane C 9 H ,3,3-trimethylhexane C 9 H ,3,4-trimethylhexane C 9 H ,2,3,3-tetramethylpentane C 9 H GPA 2145 Page 7

12 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Notes a b c b h Molar Mass Boiling Temp. Triple Point Vapor Pressure Critical Constants Acentric Factor Temp. psia 60 F 100 F Temp. Pressure Density Compound Formula F psia F psia lbm/ft ,4-dimethylheptane C 9 H ,3-dimethylheptane C 9 H methyloctane C 9 H methyloctane C 9 H methyloctane C 9 H naphthalene C 10 H tert-butylbenzene C 10 H isobutylbenzene C 10 H sec-butylbenzene C 10 H methyl-3-isopropylbenzene C 10 H methyl-4-isopropylbenzene C 10 H methyl-2-isopropylbenzene C 10 H ,3-diethylbenzene C 10 H methyl-3-propylbenzene C 10 H butylbenzene C 10 H methyl-4-propylbenzene C 10 H ,2-diethylbenzene C 10 H ,4-diethylbenzene C 10 H methyl-2-propylbenzene C 10 H ,4-dimethyl-2-ethylbenzene C 10 H ,2-dimethyl-4-ethylbenzene C 10 H ,3-dimethyl-2-ethylbenzene C 10 H ,2-dimethyl-3-ethylbenzene C 10 H ,2,4,5-tetramethylbenzene C 10 H ,2,3,5-tetramethylbenzene C 10 H ,2,3,4-tetramethylbenzene C 10 H tert-butylcyclohexane C 10 H butylcyclohexane C 10 H cyclodecane C 10 H isobutylcyclohexane C 10 H ,2-dimethyloctane C 10 H ,6-dimethyloctane C 10 H ,3-dimethyloctane C 10 H ,3-dimethyloctane C 10 H methylnonane C 10 H ethyloctane C 10 H methylnonane C 10 H methylnonane C 10 H GPA 2145 Page 8

13 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Notes a b c b h Molar Mass Boiling Temp. Triple Point Vapor Pressure Critical Constants Acentric Factor Temp. psia 60 F 100 F Temp. Pressure Density Compound Formula F psia F psia lbm/ft methylnonane C 10 H (2-methylbutyl)benzene C 11 H tert-butyl-2-methylbenzene C 11 H pentylbenzene C 11 H n-undecane C 11 H tert-butyl-3,5-dimethylbenzene C 12 H ,3,5-triethylbenzene C 12 H ,2,4-triethylbenzene C 12 H hexylbenzene C 12 H n-dodecane C 12 H n-tridecane C 13 H n-tetradecane C 14 H n-pentadecane C 15 H n-hexadecane C 16 H GPA 2145 Page 9

14 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Notes b,d e f b,d,g Density of Liquid Density of Ideal Gas Volume Relative density (60 F/60 F) API gravity Absolute Temp. coef. of density Relative density Volume Density Liquid ft 3 ideal gas/gal liq. GPA 2145 Page 10 Ratio, ideal gas/liquid 60 F, psia 60 F, sat. 60 F, psia 60 F, psia Compound - - lbm/gal 1/ F - ft 3 /lbm lbm/1000 ft3 gal/lbmol ft 3 /gal - 1 methane ethane propane isobutane n-butane isopentane n-pentane n-hexane n-heptane n-octane n-nonane n-decane ethylene propylene carbon dioxide hydrogen sulfide nitrogen oxygen helium water hydrogen carbon monoxide hydrogen chloride carbonyl sulfide chlorine ammonia sulfur dioxide methanol ethanol ethyne ,2-propadiene propyne ,3-butadiene ,2-butadiene methylpropene butene

15 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Notes b,d e f b,d,g Density of Liquid Density of Ideal Gas Volume Relative density (60 F/60 F) API gravity Absolute Temp. coef. of density Relative density Volume Density Liquid ft 3 ideal gas/gal liq. GPA 2145 Page 11 Ratio, ideal gas/liquid 60 F, psia 60 F, sat. 60 F, psia 60 F, psia Compound - - lbm/gal 1/ F - ft 3 /lbm lbm/1000 ft3 gal/lbmol ft 3 /gal - 37 (E)-2-butene (Z)-2-butene methyl-1,3-butadiene methyl-1-butene pentene methyl-1-butene (E)-2-pentene (Z)-2-pentene methyl-2-butene cyclopentane ,2-dimethylpropane benzene methylcyclopentane cyclohexane ,2-dimethylbutane ,3-dimethylbutane methylpentane methylpentane toluene ,1-dimethylcyclopentane trans-1,3-dimethylcyclopentane cis-1,3-dimethylcyclopentane trans-1,2-dimethylcyclopentane cis-1,2-dimethylcyclopentane methylcyclohexane ethylcyclopentane cycloheptane ,2-dimethylpentane ,4-dimethylpentane ,2,3-trimethylbutane ,3-dimethylpentane ,3-dimethylpentane methylhexane methylhexane ethylpentane styrene ethylbenzene

16 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Notes b,d e f b,d,g Density of Liquid Density of Ideal Gas Volume Relative density (60 F/60 F) API gravity Absolute Temp. coef. of density Relative density Volume Density Liquid ft 3 ideal gas/gal liq. GPA 2145 Page 12 Ratio, ideal gas/liquid 60 F, psia 60 F, sat. 60 F, psia 60 F, psia Compound - - lbm/gal 1/ F - ft 3 /lbm lbm/1000 ft3 gal/lbmol ft 3 /gal - 74 p-xylene m-xylene o-xylene ,1,3-trimethylcyclopentane ,trans-2,cis-4-trimethylcyclopentane r-1,t-2,c-3-trimethylcyclopentane ,1,2-trimethylcyclopentane ,cis-2,trans-4-trimethylcyclopentane r-1,c-2,t-3-trimethylcyclopentane trans-1,4-dimethylcyclohexane ,1-dimethylcyclohexane trans-1,3-dimethylcyclohexane trans-1-ethyl-3-methylcyclopentane cis-1-ethyl-3-methylcyclopentane trans-1-ethyl-2-methylcyclopentane ethyl-1-methylcyclopentane ,cis-2,cis-3-trimethylcyclopentane cis-1,4-dimethylcyclohexane cis-1,3-dimethylcyclohexane isopropylcyclopentane cis-1-ethyl-2-methylcyclopentane cis-1,2-dimethylcyclohexane propylcyclopentane ethylcyclohexane cyclooctane ,2,4-trimethylpentane ,2-dimethylhexane ,5-dimethylhexane ,4-dimethylhexane ,2,3-trimethylpentane ,3-dimethylhexane ,3,4-trimethylpentane ,3-dimethylhexane methylheptane methylheptane ,4-dimethylhexane ethylhexane

17 GPA MIDSTREAM STANDARD (FPS) becomes effective January 1, 2017 Notes b,d e f b,d,g Density of Liquid Density of Ideal Gas Volume Relative density (60 F/60 F) API gravity Absolute Temp. coef. of density Relative density Volume Density Liquid ft 3 ideal gas/gal liq. GPA 2145 Page 13 Ratio, ideal gas/liquid 60 F, psia 60 F, sat. 60 F, psia 60 F, psia Compound - - lbm/gal 1/ F - ft 3 /lbm lbm/1000 ft3 gal/lbmol ft 3 /gal methylheptane isopropylbenzene propylbenzene m-ethyltoluene p-ethyltoluene ,3,5-trimethylbenzene o-ethyltoluene ,2,4-trimethylbenzene ,2,3-trimethylbenzene ,1,4-trimethylcyclohexane ,1,3-trimethylcyclohexane r-1,c-3,c-5-trimethylcyclohexane r-1,c-3,t-5-trimethylcyclohexane trans,trans-1,2,4-trimethylcyclohexane cis-1,2,trans-1,4-1,2,4-trimethylcyclohexane r-1,t-2,c-3-trimethylcyclohexane r-1,t-2,t-4-trimethylcyclohexane cis-1,2,cis-1,4-1,2,4-trimethylcyclohexane ,1,2-trimethylcyclohexane isobutylcyclopentane cis,cis-1,2,3-trimethylcyclohexane cis-1,2,trans-1,3-cyclohexane isopropylcyclohexane butylcyclopentane propylcyclohexane methylcyclooctane ,2,4,4-tetramethylpentane ,2,5-trimethylhexane ,2,4-trimethylhexane ,4,4-trimethylhexane ,3,5-trimethylhexane ,4-dimethylheptane ,2-dimethylheptane ,2,3-trimethylhexane ,6-dimethylheptane ,5-dimethylheptane ,5-dimethylheptane