EN ISO 12213-2:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Erdgas - Berechnung von Realgasfaktoren - Teil 2: Berechnungen basierend auf einer molaren Gasanalyse als Eingangsgröße (ISO 12213-2:2006)Gaz naturel - Calcul du facteur de compression - Partie 2: Calcul à partir de l'analyse de la composition molaire (ISO 12213-2:2006)Natural gas - Calculation of compression factor - Part 2: Calculation using molar-composition analysis (ISO 12213-2:2006)75.060Zemeljski plinNatural gasICS:Ta slovenski standard je istoveten z:EN ISO 12213-2:2009SIST EN ISO 12213-2:2009en01-november-2009SIST EN ISO 12213-2:2009SLOVENSKI
STANDARDSIST EN ISO 12213-2:20051DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN ISO 12213-2
September 2009 ICS 75.060 Supersedes EN ISO 12213-2:2005English Version
Natural gas - Calculation of compression factor - Part 2: Calculation using molar-composition analysis (ISO 12213-2:2006)
Gaz naturel - Calcul du facteur de compression - Partie 2: Calcul à partir de l'analyse de la composition molaire (ISO 12213-2:2006)
Erdgas - Berechnung von Realgasfaktoren - Teil 2: Berechnungen basierend auf einer molaren Gasanalyse als Eingangsgröße (ISO 12213-2:2006) This European Standard was approved by CEN on 13 August 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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Reference numberISO 12213-2:2006(E)© ISO 2006
INTERNATIONAL STANDARD ISO12213-2Second edition2006-11-15Natural gas — Calculation of compression factor — Part 2: Calculation using molar-composition analysis Gaz naturel — Calcul du facteur de compression — Partie 2: Calcul à partir de l'analyse de la composition molaire
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ISO 12213-2:2006(E) © ISO 2006 – All rights reserved
iiiContents Page Foreword.iv 1 Scope.1 2 Normative references.1 3 Terms and definitions.1 4 Method of calculation.2 4.1 Principle.2 4.2 The AGA8-92DC equation.2 4.3 Input variables.3 4.4 Ranges of application.3 4.5 Uncertainty.5 5 Computer program.7 Annex A (normative)
Symbols and units.8 Annex B (normative)
Description of the AGA8-92DC method.10 Annex C (normative)
Example calculations.18 Annex D (normative)
Pressure and temperature conversion factors.19 Annex E (informative)
Performance over wider ranges of application.20 Annex F (informative)
Subroutines in Fortran for the AGA8-92DC method.25 Bibliography.32
ISO 12213-2:2006(E) iv
INTERNATIONAL STANDARD ISO 12213-2:2006(E) © ISO 2006 – All rights reserved
1Natural gas — Calculation of compression factor — Part 2: Calculation using molar-composition analysis 1 Scope ISO 12213 specifies 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. This part of ISO 12213 specifies a method for the calculation of compression factors when the detailed composition of the gas by mole fractions is known, together with the relevant pressures and temperatures. The method is applicable to pipeline quality gases within the ranges of pressure p and temperature T at which transmission and distribution operations normally take place, with an uncertainty of about ± 0,1 %. It can be applied, with greater uncertainty, to wider ranges of gas composition, pressure and temperature (see Annex E). More detail concerning the scope and field of application of the method is given in ISO 12213-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 6976, Natural gas — Calculation of calorific values, density, relative density and Wobbe index from composition ISO 12213-1, Natural gas — Calculation of compression factor — Part 1: Introduction and guidelines ISO 80000-4, Quantities and units — Part 4: Mechanics ISO 80000-5, Quantities and units — Part 5: Thermodynamics 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 12213-1 apply. SIST EN ISO 12213-2:2009

ISO 12213-2:2006(E) 2
ISO 12213-2:2006(E) © ISO 2006 – All rights reserved
3Z is calculated as follows: first the values of B and nC∗(n = 13 to 58) are calculated, using relationships given in Annex B. Equations (1) and (3) are then solved simultaneously for ρm and Z by a suitable numerical method (see Figure B.1). 4.3 Input variables The input variables required for use with the AGA8-92DC equation are the absolute pressure, absolute temperature and molar composition. The composition is required, by mole fraction, of the following components: nitrogen, carbon dioxide, argon, methane, ethane, propane, n-butane, methyl-2-propane (iso-butane), n-pentane, methyl-2-butane (iso-pentane), hexanes, heptanes, octanes, nonanes, decanes, hydrogen, ca
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