SIST EN ISO 13734:2014

SLOVENSKI STANDARD
SIST EN ISO 13734:2014
01-januar-2014
1DGRPHãþD
SIST EN ISO 13734:2000
Zemeljski plin - Organske sestavine, uporabljene kot dišave - Zahteve in
preskusne metode (ISO 13734:2013)
Natural gas - Organic components used as odorants - Requirements and test methods
(ISO 13734:2013)
Erdgas - Organische Verbindungen zur Verwendung als Odoriermittel - Anforderungen
und Prüfverfahren (ISO 13734:2013)
Gaz naturel - Composés organiques utilisés comme odorisants - Prescriptions et
méthodes d'essai (ISO 13734:2013)
Ta slovenski standard je istoveten z: EN ISO 13734:2013
ICS:
75.060 Zemeljski plin Natural gas
SIST EN ISO 13734:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN ISO 13734:2014

---------------------- Page: 2 ----------------------

SIST EN ISO 13734:2014

EUROPEAN STANDARD
EN ISO 13734

NORME EUROPÉENNE

EUROPÄISCHE NORM
November 2013
ICS 75.060 Supersedes EN ISO 13734:2000
English Version
Natural gas - Organic components used as odorants -
Requirements and test methods (ISO 13734:2013)
Gaz naturel - Composés organiques utilisés comme Erdgas - Organische Verbindungen zur Verwendung als
odorisants - Exigences et méthodes d'essai (ISO Odoriermittel - Anforderungen und Prüfverfahren (ISO
13734:2013) 13734:2013)
This European Standard was approved by CEN on 12 October 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

CEN-CENELEC 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 13734:2013 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST EN ISO 13734:2014
EN ISO 13734:2013 (E)
Contents Page
Foreword .3

2

---------------------- Page: 4 ----------------------

SIST EN ISO 13734:2014
EN ISO 13734:2013 (E)
Foreword
This document (EN ISO 13734:2013) 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 May 2014, and conflicting national standards shall be withdrawn at the
latest by May 2014.
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 13734:2000.
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 13734:2013 has been approved by CEN as EN ISO 13734:2013 without any modification.

3

---------------------- Page: 5 ----------------------

SIST EN ISO 13734:2014

---------------------- Page: 6 ----------------------

SIST EN ISO 13734:2014
INTERNATIONAL ISO
STANDARD 13734
Second edition
2013-11-01
Natural gas — Organic components
used as odorants — Requirements
and test methods
Gaz naturel — Composés organiques utilisés comme odorisants —
Exigences et méthodes d’essai
Reference number
ISO 13734:2013(E)
©
ISO 2013

---------------------- Page: 7 ----------------------

SIST EN ISO 13734:2014
ISO 13734:2013(E)

COPYRIGHT PROTECTED DOCUMENT
© 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.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved

---------------------- Page: 8 ----------------------

SIST EN ISO 13734:2014
ISO 13734:2013(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 Recommendations of an effective odorant . 2
4.2 Composition of odorants . 3
4.3 Cloud point . 3
4.4 Phase properties . 3
4.5 Evaporation residue . 3
4.6 Insoluble matter . 3
4.7 Solubility in water . 3
5 Handling and transport . 4
6 Tests . 4
6.1 Test sample . 4
6.2 Test documentation . 4
6.3 Determination of composition . 4
6.4 Determination of cloud point . 4
6.5 Determination of phase properties . 4
6.6 Determination of evaporation residue . 4
6.7 Visual examination for solids or suspended matter . 5
6.8 Determination of solubility in water . 5
7 Labelling and documentation . 5
7.1 Labelling . 5
7.2 Documentation . 6
Annex A (informative) Properties of odorants . 7
© ISO 2013 – All rights reserved iii

---------------------- Page: 9 ----------------------

SIST EN ISO 13734:2014
ISO 13734:2013(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 13734:1998), which has been technically
revised. It also incorporates the Corrigendum ISO 13734:1998/Corr.1:1999.
iv © ISO 2013 – All rights reserved

---------------------- Page: 10 ----------------------

SIST EN ISO 13734:2014
ISO 13734:2013(E)

Introduction
Processed natural gas received from suppliers normally has little or no odour. For safety reasons, natural
gas is therefore odorized to permit the detection by smell of the gas at very low concentrations in air.
NOTE It is a common requirement that natural gas in air be readily detectable by smell at a concentration of
20 % of the lower flammability limit (LFL). The LFL of natural gas is normally taken as the volume fraction in air
of 4 % to 5 %.
© ISO 2013 – All rights reserved v

---------------------- Page: 11 ----------------------

SIST EN ISO 13734:2014

---------------------- Page: 12 ----------------------

SIST EN ISO 13734:2014
INTERNATIONAL STANDARD ISO 13734:2013(E)
Natural gas — Organic components used as odorants —
Requirements and test methods
1 Scope
This International Standard specifies requirements and test methods for organic compounds suitable for
odorization of natural gas and natural gas substitutes for public gas supply, hereafter referred to as odorants.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 3007:2005, Petroleum products and crude petroleum — Determination of vapour pressure — Reid method
ISO 3015:1992, Petroleum products — Determination of cloud point
ISO 4256:1996, Liquefied petroleum gases — Determination of gauge vapour pressure — LPG method
ISO 4626:1980, Volatile organic liquids — Determination of boiling range of organic solvents used as
raw materials
ISO 14532, Natural gas — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 14532 (in particular 3.1 to 3.4)
and the following apply.
3.1
odorization
addition of odorants, normally intensely smelling organic sulfur compounds, to natural gas (normally
odourless) to allow the recognition of gas leaks by smell at very low concentration (before a build up to
a dangerous gas in air concentration can occur)
Note 1 to entry: Adapted from ISO 14532.
Note 2 to entry: Natural gas is normally odourless. The addition of an odorant to the gas fed into the distribution
system for safety reasons permits the detection of the gas by smell at very low concentrations.
3.2
odorant
intensely smelling organic chemical or combination of chemicals added to natural gas at low concentration
and capable of imparting a characteristic and distinctive (usually disagreeable) warning odour so gas
leaks can be detected at concentrations below their lower flammability limit
[SOURCE: ISO 14532]
© ISO 2013 – All rights reserved 1

---------------------- Page: 13 ----------------------

SIST EN ISO 13734:2014
ISO 13734:2013(E)

3.3
odour character
type of sensation of an odour
[SOURCE: ISO 14532]
Note 1 to entry: Odour character is a qualitative parameter.
3.4
odour intensity
strength of odour perception
[SOURCE: ISO 14532]
3.5
threshold concentration
concentration at which an individual has a probability of 0,5 in perceiving the odour
Note 1 to entry: To detect an odour does not imply that this odour may be identified.
3.6
odour intensity curve
relationship between odour intensity and odorant concentration in air
Note 1 to entry: The odour intensity can only be determined by the human olfactory organ.
3.7
diluent
organic liquid, normally consisting of paraffinic hydrocarbons, used to reduce the concentration of an
odorant to a suitable level at which the solution may be injected into the natural gas
3.8
cloud point
temperature at which a cloud of crystals first appears in a liquid when it is cooled under specified conditions
4 Requirements
4.1 Recommendations of an effective
...