EN ISO 12213-1:2009

Natural gas - Calculation of compression factor - Part 1: Introduction and guidelines (ISO 12213-1:2006)

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.
It is divided into three parts: this part, ISO 12213-1:2006, gives an introduction and provides guidelines for the methods of calculation described in Parts 2 and 3.

Erdgas - Berechnung von Realgasfaktoren - Teil 1: Einführung und Leitfaden (ISO 12213-1:2006)

Die Internationale Norm ISO 12213 legt für Erdgase, Erdgase mit synthetischen Beimischungen und ähnliche
Gemische Verfahren zur Berechnung der Realgasfaktoren unter Bedingungen fest, unter denen das Gemisch
nur als Gas existieren kann.
Diese Norm besteht aus drei Teilen: Im vorliegenden Teil 1 von ISO 12213 werden eine Einführung und ein
Leitfaden für die in ISO 12213-2 und ISO 12213-3 beschriebenen Berechnungsverfahren angegeben.
Im Teil 2 wird ein Verfahren festgelegt, das dann anzuwenden ist, wenn die molare Zusammensetzung des
Gases exakt bekannt ist. Das im Teil 3 beschriebene Verfahren ist anzuwenden, wenn eine weniger
detaillierte Analyse unter Einbeziehung des (volumenbezogenen) Brennwerts, der relativen Dichte, des
Kohlenstoffdioxid- und des Wasserstoffgehalts (sofern Wasserstoff enthalten ist) verfügbar ist.
Beide Verfahren gelten für trockene aufbereitete Erdgase innerhalb der üblichen Bedingungen für Gastransport
und Verteilung, einschließlich Abrechnungsmessungen und sonstigen Abrechnungszwecken. Im
Allgemeinen werden diese bei Temperaturen zwischen etwa 263 K und 338 K (etwa −10 °C bis 65 °C) und bei
12 MPa (120 bar) nicht überschreitenden Drücken durchgeführt. Die erwartete Unsicherheit für beide
Verfahren beträgt bei Einhaltung dieser Bedingungen etwa ± 0,1 %, sofern die Eingabegrößen, einschließlich
der jeweiligen Drücke und Temperaturen, keine Unsicherheit aufweisen.
ANMERKUNG In dieser Internationalen Norm steht die Benennung „pipeline quality gas“ für Erdgas, das für den
Einsatz in Industrie, Gewerbe oder den Haushaltsbereich aufbereitet wurde. Obwohl für Gase, die diesem Begriff
entsprechen, international keine formale Festlegung für Zusammensetzung und Eigenschaften vereinbart ist, werden in
5.1.1 einige quantitative Richtwerte angegeben. Eine detaillierte Spezifikation der Gasbeschaffenheit ist im Allgemeinen
Gegenstand der vertraglichen Vereinbarungen zwischen Käufer und Verkäufer.

Gaz naturel - Calcul du facteur de compression - Partie 1: Introduction et lignes directrices (ISO 12213-1:2006)

L'ISO 12213 spécifie des méthodes pour le calcul des facteurs de compression des gaz naturels, des gaz naturels contenant un adjuvant synthétique et de mélanges similaires dans des conditions telles que le mélange ne peut exister que sous forme gazeuse.
Elle est divisée en trois parties: la présente partie, l'ISO 12213-1:2006, donne une introduction et fournit des lignes directrices pour les méthodes de calcul décrites dans l'ISO 12213‑2 et dans l'ISO 12213‑3.

Zemeljski plin - Izračun kompresijskega faktorja - 1. del: Uvod in smernice (ISO 12213-1:2006)

General Information

• Status: Published
• Publication Date: 08-Sep-2009
• ICS: 75.060 - Natural gas
• Technical Committee: CEN/TC 238 - Test gases, test pressures and categories of appliances
• Drafting Committee: CEN/TC 238 - Test gases, test pressures and categories of appliances
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 09-Sep-2009
• Completion Date: 09-Sep-2009
• Ref Project: SIST EN ISO 12213-1:2009 - Natural gas - Calculation of compression factor - Part 1: Introduction and guidelines (ISO 12213-1:2006)

Relations

• Replaces: EN ISO 12213-1:2005 - Natural gas - Calculation of compression factor - Part 1: Introduction and guidelines (ISO 12213-1:1997)
• Effective Date: 12-Sep-2009

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2009
1DGRPHãþD
SIST EN ISO 12213-1:2005
=HPHOMVNLSOLQ,]UDþXQNRPSUHVLMVNHJDIDNWRUMDGHO8YRGLQVPHUQLFH,62

Natural gas - Calculation of compression factor - Part 1: Introduction and guidelines (ISO
12213-1:2006)
Erdgas - Berechnung von Realgasfaktoren - Teil 1: Einführung und Leitfaden (ISO 12213
-1:2006)
Gaz naturel - Calcul du facteur de compression - Partie 1: Introduction et lignes
directrices (ISO 12213-1:2006)
Ta slovenski standard je istoveten z: EN ISO 12213-1:2009
ICS:
75.060 Zemeljski plin Natural gas
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 12213-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2009
ICS 75.060 Supersedes EN ISO 12213-1:2005
English Version
Natural gas - Calculation of compression factor - Part 1:
Introduction and guidelines (ISO 12213-1:2006)
Gaz naturel - Calcul du facteur de compression - Partie 1: Erdgas - Berechnung von Realgasfaktoren - Teil 1:
Introduction et lignes directrices (ISO 12213-1:2006) Einführung und Leitfaden (ISO 12213-1:2006)
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.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12213-1:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
The text of ISO 12213-1:2006 has been prepared by Technical Committee ISO/TC 193 “Natural gas” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 12213-1:2009.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by March 2010, and conflicting national standards shall be withdrawn at
the latest by March 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 12213-1:2005.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: 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 the United Kingdom.
Endorsement notice
The text of ISO 12213-1:2006 has been approved by CEN as a EN ISO 12213-1:2009 without any
modification.
INTERNATIONAL ISO
STANDARD 12213-1
Second edition
2006-11-15
Natural gas — Calculation of
compression factor —
Part 1:
Introduction and guidelines
Gaz naturel — Calcul du facteur de compression —
Partie 1: Introduction et lignes directrices

Reference number
ISO 12213-1:2006(E)
©
ISO 2006
ISO 12213-1:2006(E)
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ii © ISO 2006 – All rights reserved

ISO 12213-1:2006(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 2
3 Terms and definitions. 2
4 General principles. 4
5 Guidelines. 5
5.1 Pipeline quality natural gases . 5
5.2 Other gases and other applications. 8
Annex A (normative) Symbols and units. 11
Annex B (informative) Computer program. 12
Bibliography . 13

ISO 12213-1:2006(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 12213-1 was prepared by Technical Committee ISO/TC 193, Natural gas, Subcommittee SC 1, Analysis
of natural gas.
This second edition cancels and replaces the first edition (ISO 12213-1:1997), of which it constitutes a minor
revision (the year of publication of Reference [5] in the Bibliography has been corrected).
ISO 12213 consists of the following parts, under the general title Natural gas — Calculation of compression
factor:
⎯ Part 1: Introduction and guidelines
⎯ Part 2: Calculation using molar-composition analysis
⎯ Part 3: Calculation using physical properties

iv © ISO 2006 – All rights reserved

INTERNATIONAL STANDARD ISO 12213-1:2006(E)

Natural gas — Calculation of compression factor —
Part 1:
Introduction and guidelines
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.
It is divided into three parts: this part of ISO 12213 gives an introduction and provides guidelines for the
methods of calculation described in ISO 12213-2 and ISO 12213-3.
Part 2 gives a method for use where the detailed molar composition of the gas is known. Part 3 gives a
method for use where a less detailed analysis, comprising superior calorific value (volumetric basis), relative
density, carbon dioxide content and (if non-zero) hydrogen content, is available.
Both methods are applicable to dry gases of pipeline quality within the range of conditions under which
transmission and distribution, including metering for custody transfer or other accounting purposes, are
normally carried out. In general, such operations take place at temperatures between about 263 K and 338 K
(approximately −10 °C to 65 °C) and pressures not exceeding 12 MPa (120 bar). Within this range, the
uncertainty of prediction of both methods is about ± 0,1 % provided that the input data, including the relevant
pressure and temperature, have no uncertainty.
NOTE Pipeline quality gas is used in this International Standard as a concise term for gas which has been processed
so as to be suitable for use as industrial, commercial or domestic fuel. Although there is no formal international agreement
upon the composition and properties of a gas which complies with this concept, some quantitative guidance is provided
in 5.1.1. A detailed gas quality specification is usually a matter for contractual arrangements between buyer and seller.
The method given in Part 2 is also applicable (with increased uncertainty) to broader categories of natural gas,
including wet or sour gases, within a wider range of temperatures and to higher pressures, for example for
reservoir or underground storage conditions or for vehicular (NGV) applications.
The method given in Part 3 is applicable to gases with a higher content of nitrogen, carbon dioxide or ethane
than normally found in pipeline quality gas. The method may also be applied over wider ranges of temperature
and pressure but with increased uncertainty.
For the calculation methods described to be valid, the gas must be above its water and hydrocarbon
dewpoints at the prescribed conditions.
This International Standard gives all of the equations and numerical values needed to implement both
methods. It is planned to make verified computer programs available (see Annex B).
ISO 12213-1:2006(E)
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 13443, Natural gas — Standard reference conditions
3 Terms and definitions
For the purposes of the various parts of this International Standard, the following terms and definitions apply.
3.1
compression factor
Z
ratio of the volume of an arbitrary mass of gas, at a specified pressure and temperature, to the volume of the
same mass of gas under the same conditions as calculated from the ideal-gas law, as follows:
Z = V (real)/V (ideal) (1)
m m
where
V (ideal) = RT/p (2)
m
NOTE 1 Thus
Z(p, T, y) = pV (p, T, y)/(RT) (3)
m
where
p is the absolute pressure;
T is the thermodynamic temperature;
y is a set of parameters which uniquely characterizes the gas (in principle, the latter may be the complete molar
composition or a distinctive set of dependent physico-chemical properties, or a mixture of both);
V is the molar volume of the gas;
m
R is the molar gas constant, in coherent units.
NOTE 2 The compression factor is a dimensionless quantity usually close to unity.
NOTE 3 The terms “compressibility factor” and “Z-factor” are synonymous with compression factor.
3.2
density
ρ
mass of a given quantity of gas divided by its vo
...