This International Standard specifies methods for the calculation of the superior calorific value,inferior calorific value,density,relative density and Wobbe index of dry natural gases,natural gas substitutes and other combustible gaseous fuels,when the composition of the gas by mole fraction is known.The methods provide a means of calculating the properties of the gas mixture at commonly used metric reference conditions.The methods of calculation require values for various physical properties of the pure components;these values are provided in tables and their sources are identified.Methods are given for estimating the precision of calculated properties.Th
EN ISO 6976:2005 history
2016EN ISO 6976:2016 Natural gas - Calculation of calorific values@ density@ relative density and Wobbe indices from composition
2005EN ISO 6976:2005 Natural gas - Calculation of calorific values, density, relative density and Wobbe index from composition