EN ISO 13686:2013

SLOVENSKI STANDARD
01-september-2013
1DGRPHãþD
SIST EN ISO 13686:2005
Zemeljski plin - Specificiranje kakovosti (ISO 13686:2013)
Natural gas - Quality designation (ISO 13686:2013)
Erdgas - Bestimmung der Beschaffenheit (ISO 13686:2013)
Gaz naturel - Désignation de la qualité (ISO 13686:2013)
Ta slovenski standard je istoveten z: EN ISO 13686:2013
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 13686
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2013
ICS 75.060 Supersedes EN ISO 13686:2005
English Version
Natural gas - Quality designation (ISO 13686:2013)
Gaz naturel - Désignation de la qualité (ISO 13686:2013) Erdgas - Bestimmung der Beschaffenheit (ISO
13686:2013)
This European Standard was approved by CEN on 29 May 2013.

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-CENELEC 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-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13686:2013: E
worldwide for CEN national Members.

Contents Page
Foreword .3
Foreword
This document (EN ISO 13686:2013) has been prepared by Technical Committee ISO/TC 193 "Natural gas".
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 December 2013, and conflicting national standards shall be withdrawn
at the latest by December 2013.
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 13686:2005.
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, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 13686:2013 has been approved by CEN as EN ISO 13686:2013 without any modification.
INTERNATIONAL ISO
STANDARD 13686
Second edition
2013-06-15
Natural gas — Quality designation
Gaz naturel — Désignation de la qualité
Reference number
ISO 13686:2013(E)
©
ISO 2013
ISO 13686:2013(E)
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
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Published in Switzerland
ii © ISO 2013 – All rights reserved

ISO 13686:2013(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols, abbreviations and units . 6
4.1 Symbols . 6
4.2 Abbreviations . 6
4.3 Subscripts . 6
5 Quality designation parameters. 7
5.1 General . 7
5.2 Gas composition . 7
5.3 Gas properties . 8
6 Sampling . 9
Annex A (informative) Introduction to informative annexes .10
Annex B (informative) German Regulation Code of Practice DVGW G 260:2008, Extract of the
relevant parts for natural gases .18
Annex C (informative) European Standard EN 437 “Test gases, test pressures and categories of
appliances” .22
Annex D (informative) Interchangeability AGA index method .25
Annex E (informative) British Gas Hydrocarbon Equivalence Method .32
Annex F (informative) Weaver index method .37
Annex G (informative) French method for determining gas interchangeability (Delbourg method)
(guide for determining the interchangeability of second family gases) .39
Annex H (informative) Spanish regulation code (Detail Protocol-01 — Measurement) — Extract of
the relevant parts for natural gases .45
Annex I (informative) Harmonization of gas property data for cross-border transportation .46
Bibliography .48
ISO 13686:2013(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
The committee responsible for this document is ISO/TC 193, Natural gas.
This second edition cancels and replaces the first edition (ISO 13686:1998), which has been
technically revised.
iv © ISO 2013 – All rights reserved

ISO 13686:2013(E)
Introduction
The need for an International Standard concerning the designation of natural gas quality was a basic
reason for the establishment of ISO/TC 193 in 1989. Standardization of the designation of quality is
specifically stated in the scope of ISO/TC 193. Natural gas, supplying 20 % of the world’s primary energy,
is likely to increase its market share greatly. Yet there is currently no generally accepted definition of
natural gas quality.
To meet this need, it was decided that a general statement of the parameters (i.e. components and
properties) recommended should be established and that the resulting International Standard would
not specify values of, or limits for, these parameters.
Furthermore, it was decided that general-purpose natural gas transmitted to local distribution systems
(LDS), referred to as “natural gas”, should be the first consideration. Thus, this International Standard
was developed. Informative annexes are attached as examples of actual natural gas quality specifications
that already exist.
This International Standard does not impose any quality restrictions on raw gas transported via
pipelines or gathering systems to processing or treating facilities.
It should be understood that this International Standard covers natural gas at the pipeline level prior to
any treatment by LDS for peakshaving purposes. This covers the vast majority of the natural gas that is
sold in international trade and transmitted for custody transfer to local distribution systems.
INTERNATIONAL STANDARD ISO 13686:2013(E)
Natural gas — Quality designation
1 Scope
This International Standard specifies the parameters required to describe finally processed and, where
required, blended natural gas. Such gas is referred to subsequently in this text simply as “natural gas”.
The main text of this International Standard contains a list of these parameters, their units and references
to measurement standards. Informative annexes give examples of typical values for these parameters,
with the main emphasis on health and safety.
In defining the parameters governing composition, physical properties and trace constituents,
consideration has also been given to existing natural gases to ensure their continuing viability.
The question of interchangeability is dealt with in Annex A (see Clause
...