NEN EN ISO 12213-1 : 2009

1 Scope
2 Normative references
3 Definitions
4 General principles
5 Guidelines
  5.1 Pipeline quality natural gases
      5.1.1 Pipeline quality gas
      5.1.2 Transmission and distribution metering
      5.1.3 Calculation using a molar-composition
            analysis
      5.1.4 Calculation using physical properties
      5.1.5 Manufactured gases
      5.1.6 Predictive uncertainty
      5.1.7 Wider ranges of pressure and temperature
  5.2 Other gases and other applications
      5.2.1 Introduction
      5.2.2 Lean and rich gases
      5.2.3 Wet and sour gases
      5.2.4 Manufactured gases
      5.2.5 Summary of predictive uncertainty
      5.2.6 Calculation of related properties
Annexes
A Symbols and units
B Suppliers of computer programmes
C Bibliography

Defines methods for the calculation of compression factors of natural gases, natural gases containing a synthetic admixture and similar mixtures at conditions under which the mixture can exist only as a gas.