EN ISO 6974-5:2001

Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 5: Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line process application using three columns (ISO 6974-5:2000)

Migrated from Progress Sheet (TC Comment) (2000-07-10): WIs 020-025 = result of the splitting of WI 011 (CC/991102 at the request of ++ R. R{migy and A. Pirlet)

Erdgas - Bestimmung der Zusammensetzung mit definierter Unsicherheit durch Gaschromatographie - Teil 5: Bestimmung von Stickstoff, Kohlenstoffdioxid und C1 bis C5 und C6+ Kohlenwasserstoffen für eine Labor- und Online-Prozessanwendung mit drei Säulen (ISO 6974-5:2000)

Dieser Teil von ISO 6974 beschreibt ein gaschromatographisches Verfahren zur quantitativen Bestimmung der Bestandteile von Erdgas unter Verwendung eines Systems mit drei Säulen. Dieses Verfahren ist einsetzbar für Erdgase eines begrenzten Bereiches, On-line und mit regelmäßiger Kalibrierung, für Gasproben, die weder Kohlenwasserstoffkondensate noch Wasser enthalten. Es ist anwendbar zur Analyse von Gasen, deren Bestandteile im Bereich der in Tabelle 1 angegebenen Molfraktionen liegen. Diese Bereiche stellen nicht die Detektionsgrenzen dar, sondern die Grenzen, innerhalb deren die angegebene Präzision gilt. Auch wenn eine oder mehrere Komponenten in einer Probe nicht nachgewiesen werden, kann das Verfahren trotzdem angewandt werden.
Dieser Teil von ISO 6974 kann nur in Verbindung mit den Teilen 1 und 2 von ISO 6974 angewandt werden.
Tabelle 1 - Anwendungsbereiche
Komponente   Molfraktionsbereich
%
Stickstoff   0,001 bis 15,0
Kohlenstoffdioxid   0,001 bis 8,5
Methan   75 bis 100
Ethan   0,001 bis 10,0
Propan   0,001 bis 3,0
iso-Butan (2-Methylpropan)   0,001 bis 1,0
n-Butan   0,001 bis 1,0
neo-Pentan (2,2-Dimethylpropan)   0,001 bis 0,5
iso-Pentan (2-Methylbutan)   0,001 bis 0,5
n-Pentan   0,001 bis 0,5
Hexane + Summe aller C6 und höheren Kohlenwasserstoffe   0,001 bis 0,2
ANMERKUNG 1   Höhere Kohlenwasserstoffe als n-Pentan werden als ¿Pseudokomponente" C6+ bezeichnet, die als ein zusammengesetzter Peak bestimmt und als solcher auch kalibriert wird. Die Eigenschaften von C6+ werden auf der Basis einer detaillierten Analyse der einzelnen C6- und der höheren Kohlenwasserstoffe durch erweiterte Analyse oder  aus vorliegenden Ergebnissen früherer Analysen abgeschätzt.

Gaz naturel - Détermination de la composition avec une incertitude définie par chromatographie en phase gazeuse - Partie 5: Détermination de l'azote, du dioxyde de carbone et des hydrocarbures (C1 à C5 et C6+) pour l'application du processus en continu employant trois colonnes (ISO 6974-5:2000)

L'ISO 6974-5:2000 décrit une méthode par chromatographie en phase gazeuse pour la détermination quantitative de constituants du gaz naturel à l'aide d'un système à trois colonnes. Cette méthode est applicable aux gaz naturels de plage limitée, utilisés régulièrement pour l'étalonnage en ligne et automatique d'échantillons de gaz ne contenant pas de condensats d'hydrocarbures et/ou d'eau. Elle est applicable à l'analyse de gaz contenant des constituants dans les limites des gammes de fractions molaires indiquées au Tableau 1 de l'ISO 6974-5:2000. Ces gammes ne représentent pas les limites de détection, mais les limites à l'intérieur desquelles s'applique la fidélité spécifiée de la méthode. Même si la présence d'un ou plusieurs constituants d'un échantillon est susceptible de ne pas être détectée, la méthode peut tout de même être applicable.
L'ISO 6974-5:2000 n'est applicable que conjointement avec l'ISO 6974-1 et l'ISO 6974-2.

Zemeljski plin - Določevanje sestave z določeno negotovostjo s plinsko kromatografijo - 5. del: Določevanje dušika, ogljikovega dioksida in C1 do C5 in C6+ ogljikovodikov za laboratorijske in neposredne procesne aplikacije z uporabo treh kolon (ISO 6974-5:2000)

General Information

• Status: Withdrawn
• Publication Date: 21-Aug-2001
• Withdrawal Date: 15-Jul-2014
• ICS: 75.060 - Natural gas
• Technical Committee: CEN/SS N21 - Gaseous fuels and combustible gas
• Drafting Committee: CEN/SS N21 - Gaseous fuels and combustible gas
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 16-Jul-2014
• Ref Project: SIST EN ISO 6974-5:2001 - Natural gas - Determination of composition with defined uncertainty by gas chromatography - Part 5: Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line process application using three columns (ISO 6974-5:2000)

Relations

• Replaced By: EN ISO 6974-5:2014 - Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 5: Isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons (ISO 6974-5:2014)
• Effective Date: 23-Jul-2014

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2001
=HPHOMVNLSOLQ'RORþHYDQMHVHVWDYH]GRORþHQRQHJRWRYRVWMRVSOLQVNR
NURPDWRJUDILMRGHO'RORþHYDQMHGXãLNDRJOMLNRYHJDGLRNVLGDLQ&GR&LQ
&RJOMLNRYRGLNRY]DODERUDWRULMVNHLQQHSRVUHGQHSURFHVQHDSOLNDFLMH]XSRUDER
WUHKNRORQ,62
Natural gas - Determination of composition with defined uncertainty by gas
chromatography - Part 5: Determination of nitrogen, carbon dioxide and C1 to C5 and
C6+ hydrocarbons for a laboratory and on-line process application using three columns
(ISO 6974-5:2000)
Erdgas - Bestimmung der Zusammensetzung mit definierter Unsicherheit durch
Gaschromatographie - Teil 5: Bestimmung von Stickstoff, Kohlenstoffdioxid und C1 bis
C5 und C6+ Kohlenwasserstoffen für eine Labor- und Online-Prozessanwendung mit
drei Säulen (ISO 6974-5:2000)
Gaz naturel - Détermination de la composition avec une incertitude définie par
chromatographie en phase gazeuse - Partie 5: Détermination de l'azote, du dioxyde de
carbone et des hydrocarbures (C1 a C5 et C6+) pour l'application du processus en
continu employant trois colonnes (ISO 6974-5:2000)
Ta slovenski standard je istoveten z: EN ISO 6974-5:2001
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 6974-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2001
ICS 75.060
English version
Natural gas - Determination of composition with defined
uncertainty by gas chromatography - Part 5: Determination of
nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons
for a laboratory and on-line process application using three
columns (ISO 6974-5:2000)
Gaz naturel - Détermination de la composition avec une Erdgas - Bestimmung der Zusammensetzung mit
incertitude définie par chromatographie en phase gazeuse definierter Unsicherheit durch Gaschromatographie - Teil 5:
- Partie 5: Détermination de l'azote, du dioxyde de carbone Bestimmung von Stickstoff, Kohlenstoffdioxid und C1 bis
et des hydrocarbures (C1 à C5 et C6+) pour l'application du C5 und C6+ Kohlenwasserstoffen für eine Labor- und
processus en continu employant trois colonnes (ISO 6974- Online-Prozessanwendung mit drei Säulen (ISO 6974-
5:2000) 5:2000)
This European Standard was approved by CEN on 22 June 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6974-5:2001 E
worldwide for CEN national Members.

CORRECTED  2002-03-13
Foreword
The text of the International Standard from Technical Committee ISO/TC 193 "Natural gas" of
the International Organization for Standardization (ISO) has been taken over as a European
Standard by CMC.
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 February 2002, and conflicting national
standards shall be withdrawn at the latest by February 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of the International Standard ISO 6974-5:2000 has been approved by CEN as a
European Standard without any modifications.
NOTE Normative references to International Standards are listed in annex ZA (normative).
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of
any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications, indicated
by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 6974-1 2000 Natural gas - Determination of EN ISO 6974-1 2001
composition with defined
uncertainty by gas chromatography
- Part 1: Guidelines for tailored
analysis
INTERNATIONAL ISO
STANDARD 6974-5
First edition
2000-04-01
Natural gas — Determination of
composition with defined uncertainty by
gas chromatography —
Part 5:
Determination of nitrogen, carbon dioxide
and C1 to C5 and C6+ hydrocarbons for a
laboratory and on-line process application
using three columns
Gaz naturel — Détermination de la composition avec une incertitude
définie par chromatographie en phase gazeuse —
Partie 5: Détermination de l'azote, du dioxyde de carbone et des
hydrocarbures (C1 à C5 et C6+) pour l'application du processus en continu
employant trois colonnes
Reference number
ISO 6974-5:2000(E)
©
ISO 2000
ISO 6974-5:2000(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not
be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this
file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this
area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters
were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event
that a problem relating to it is found, please inform the Central Secretariat at the address given below.
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body
in the country of the requester.
ISO copyright office
Case postale 56 � CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 734 10 79
E-mail [e-mail]
Web www.iso.ch
Printed in Switzerland
ii © ISO 2000 – All rights reserved

ISO 6974-5:2000(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Normative references .2
3 Principle.2
4 Materials .3
5 Apparatus .3
6 Procedure .4
6.1 Gas chromatographic operating conditions.4
6.2 Calibration .5
6.3 Performance requirements.6
6.3.1 Peak resolution .6
6.3.2 Chromatogram .6
6.4 Determination.6
6.4.1 Sample valve purge .6
6.4.2 Analysis .7
7 Expression of results .7
7.1 Precision and accuracy.7
8 Test report .7
Annex A (informative) Procedure for setting valve timings and restrictor setting .11
Annex B (informative) Typical precision values .13
Bibliography.14
ISO 6974-5:2000(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 3.
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 part of ISO 6974 may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 6974-5 was prepared by Technical Committee ISO/TC 193, Natural gas, Subcommittee
SC 1, Analysis of natural gas.
This part as well as the other five parts of ISO 6974 cancel and replace ISO 6974:1984 which specified only one
method.
ISO 6974 consists of the following parts, under the general title Natural gas — Determination of composition with
defined uncertainty by gas chromatography:
— Part 1: Guidelines for tailored analysis
— Part 2: Measuring-system characteristics and statistics for data treatment
— Part 3: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C using
two packed columns
— Part 4: Determination of nitrogen, carbon dioxide and C to C and C hydrocarbons for a laboratory and on-
1 5 6�
line measuring system using two columns
— Part 5: Determination of nitrogen, carbon dioxide and C to C and C hydrocarbons for a laboratory and on-
1 5 6�
line process application using three columns
— Part 6: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C using
three capillary columns
Annexes A and B of this part of ISO 6974 are for information only.
iv © ISO 2000 – All rights reserved

ISO 6974-5:2000(E)
Introduction
This part of ISO 6974 describes a precise and accurate method for the determination of the composition of natural
gas. The compositional data obtained are used for the calculation of the calorific value, the relative density and the
Wobbe index.
This method is based on a automatic column-switching technique in which multiple columns, chosen for their
s
...