BS ISO 20765-1 : 2005
Current
The latest, up-to-date edition.
NATURAL GAS - CALCULATION OF THERMODYNAMIC PROPERTIES - PART 1: GAS PHASE PROPERTIES FOR TRANSMISSION AND DISTRIBUTION APPLICATIONS
Hardcopy , PDF
English
01-01-2005
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Thermodynamic basis of the method
4.1 Principle
4.2 The fundamental equation of Helmholtz free energy
4.3 Thermodynamic properties derived from the Helmholtz
free energy
5 Method of calculation
5.1 Input variables
5.2 Conversion from pressure to reduced density
5.3 Implementation
6 Ranges of application
6.1 Pressure and temperature
6.2 Pipeline quality gas
7 Uncertainty
7.1 Uncertainty for pipeline quality gas
7.2 Impact of uncertainties of input variables
8 Reporting of results
Annex A (normative) - Symbols and units
Annex B (normative) - The Helmholtz free energy of the
ideal gas
Annex C (normative) - The equation for the Helmholtz free
energy
Annex D (normative) - Detailed documentation for the
equation of state
Annex E (informative) - Assignment of trace components
Annex F (informative) - Implementation of the method
Annex G (informative) - Examples
Bibliography
Describes a method of calculation for the volumetric and caloric properties of natural gases, natural gases containing synthetic admixture and similar mixtures, at conditions where the mixture can exist only as a gas.
| Committee |
PTI/15
|
| DevelopmentNote |
Issue date: 28/02/2009. Supersedes 04/30055562 DC. (03/2009)
|
| DocumentType |
Standard
|
| Pages |
54
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| ISO 20765-1:2005 | Identical |
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| BS 7965:2013 | Guide to the selection, installation, operation and calibration of diagonal path transit time ultrasonic flowmeters for industrial gas applications |
| 13/30268440 DC : 0 | BS 7965 - GUIDE TO THE SELECTION, INSTALLATION, OPERATION AND CALIBRATION OF DIAGONAL PATH TRANSIT TIME ULTRASONIC FLOWMETERS FOR INDUSTRIAL GAS APPLICATIONS |
| ISO 6976:2016 | Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from composition |
| ISO 14532:2014 | Natural gas — Vocabulary |
| ISO 7504:2015 | Gas analysis — Vocabulary |
| ISO 12213-2:2006 | Natural gas — Calculation of compression factor — Part 2: Calculation using molar-composition analysis |
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