RO
SR EN ISO 20765-1:2019
Natural gas - Calculation of thermodynamic properties - Part 1: Gas phase properties for transmission and distribution applications (ISO 20765-1:2005)
This part of ISO 20765 specifies 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. The method is applicable to pipeline-quality gases within the ranges of pressure and temperature at which transmission and distribution operations normally take place. For volumetric properties (compression factor and density), the uncertainty of calculation is about ± 0,1 % (95 % confidence interval). For caloric properties (for example enthalpy, heat capacity, Joule-Thomson coefficient, speed of sound), the uncertainty of calculation is usually greater.
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Status :
Valid
Approval date : 5/31/2019
Romanian version publish date : 5/31/2019
Number of pages : 50
ICS : 75.020 Extraction and processing of petroleum and natural gas
Technical Committee : 357 - Natural gas
- Replaces SR ISO 20765-1:2007
- Normative reference SR EN ISO 80000-4:2013
- Normative reference SR EN ISO 80000-5:2013
- Normative reference SR ISO 7504:2016
- Normative reference SR EN ISO 14532:2017
- Normative reference SR EN ISO 12213-2:2010