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About This Item

 

Full Description

BS EN ISO 20765-1:2018 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, p, and temperature, T, 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.


Cross References:
ISO 14532
ISO 12213-2
ISO 7504
ISO 31-3
ISO 31-4
ISO 6976:1995


Incorporates the following:
Corrigendum, October 2018
 

Document History

  1. BS EN ISO 20765-1:2018

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    Natural gas. Calculation of thermodynamic properties-Gas phase properties for transmission and distribution applications

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  2. BS ISO 20765-1:2005


    Natural gas. Calculation of thermodynamic properties. Gas phase properties for transmission and distribution applications

    • Historical Version