Natural gas - Calculation of compression factor - Part 2: Calculation using molar-composition analysis (ISO 12213-2:1997); German version EN ISO 12213-2:2005— 38 стр.
Natural gas - Calculation of calorific values, density, relative density and Wobbe index from composition (ISO 6976:1995 including Corrigendum 1:1997, Corrigendum 2:1997 and Corrigendum 3:1999); German version EN ISO 6976:2005— 69 стр.
Natural gas - Calculation of compression factor - Part 2: Calculation using molar-composition analysis (ISO 12213-2:2006); German version EN ISO 12213-2:2009— 39 стр.
Natural gas - Calculation of compression factor - Part 2: Calculation using molar-composition analysis (ISO 12213-2:2006); German version EN ISO 12213-2:2009— 39 стр.
Natural gas - Designation of the quality of natural gas for use as a compressed fuel for vehicles (ISO 15403:2000); German version EN ISO 15403:2005— 28 стр.
Natural gas - Natural gas for use as a compressed fuel for vehicles - Part 1: Designation of the quality (ISO 15403-1:2006); German version EN ISO 15403-1:2008— 32 стр.