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ISO 20765-1:2005

Natural gas — Calculation of thermodynamic properties — Part 1: Gas phase properties for transmission and distribution applications

Sep 9, 2005

General information

90.20     Apr 15, 2026

ISO

ISO/TC 193/SC 1

International Standard

75.060  

English   French  

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Scope

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.

Life cycle

NOW

PUBLISHED
ISO 20765-1:2005
90.20 Standard under periodical review
Apr 15, 2026

National adoptions

SRPS ISO 20765-1:2013  
ISS

Natural gas — Calculation of thermodynamic properties — Part 1: Gas phase properties for transmission and distribution applications

95.99   Withdrawal of Standard

H193 more

SRPS EN ISO 20765-1:2018  
ISS

Natural gas - Calculation of thermodynamic properties - Part 1: Gas phase properties for transmission and distribution applications (ISO 20765-1:2005)

60.60   Standard published

H193 more

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