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 compression factor - Part 3: Calculation using physical properties (ISO 12213-3:1997); German version EN ISO 12213-3:2005— 39 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 - Determination of mercury - Part 2: Sampling of mercury by amalgamation on gold/platinum alloy (ISO 6978-2:2003); German version EN ISO 6978-2:2005— 25 стр.
Natural gas - Determination of mercury - Part 1: Sampling of mercury by chemisorption on iodine (ISO 6978-1:2003); German version EN ISO 6978-1:2005— 23 стр.
