Стандарт BS EN ISO 13686:2013

Condensation, Formulae (mathematics), Aliphatic hydrocarbons, Physical property measurement, Compositional tolerances, Chemical analysis and testing, Grades (quality), Quality, Contaminants, Physical properties of materials, Fuels, Sampling methods, Interchangeability, Legislation, Chemical properties, Quality assurance, Designations, Natural gas, Gas supply, Test equipment, 2nd family gases, Regulations, Odours, Chemical composition, Aromatic hydrocarbons, Gas analysis, Gaseous fuels, Gases