oSIST prEN ISO 14532:2025
(Main)Natural gas - Vocabulary (ISO/DIS 14532:2025)
Natural gas - Vocabulary (ISO/DIS 14532:2025)
ISO 14532:2014 establishes the terms, definitions, symbols, and abbreviations used in the field of natural gas.
The terms and definitions have been reviewed and studied in order to cover all aspects of any particular term with input from other sources such as European Standards from CEN (The European Committee for Standardization), national standards, and existing definitions in the IGU Dictionary of the Gas Industry.
The definitive intention of ISO 14532:2014 is to incorporate the reviewed definitions into the ISO/TC 193 source standards.
Erdgas - Terminologie (ISO/DIS 14532:2025)
Gaz naturel - Vocabulaire (ISO/DIS 14532:2025)
L'ISO 14532:2014 a pour objet de donner les définitions, symboles et abréviations utilisés dans le domaine du gaz naturel.
Les termes et définitions ont été étudiés et revus de manière à couvrir toutes les acceptations particulières des termes provenant également d'autres sources telles que les normes européennes du CEN (Comité Européen de Normalisation), les normes nationales et les définitions existantes dans le dictionnaire U.I.I.G de l'industrie du gaz.
L'intention définitive de ce document est d'intégrer les définitions révisées dans les normes source de l'ISO/TC 193.
Zemeljski plin - Slovar (ISO/DIS 14532:2025)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2025
Zemeljski plin - Slovar (ISO/DIS 14532:2025)
Natural gas - Vocabulary (ISO/DIS 14532:2025)
Erdgas - Terminologie (ISO/DIS 14532:2025)
Gaz naturel - Vocabulaire (ISO/DIS 14532:2025)
Ta slovenski standard je istoveten z: prEN ISO 14532
ICS:
01.040.75 Naftna in sorodna tehnologija Petroleum and related
(Slovarji) technologies (Vocabularies)
75.060 Zemeljski plin Natural gas
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 14532
ISO/TC 193
Natural gas — Vocabulary
Secretariat: NEN
Gaz naturel — Vocabulaire
Voting begins on:
2025-05-15
ICS: 75.060; 01.040.75
Voting terminates on:
2025-08-07
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
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Reference number
ISO/DIS 14532:2025(en)
DRAFT
ISO/DIS 14532:2025(en)
International
Standard
ISO/DIS 14532
ISO/TC 193
Natural gas — Vocabulary
Secretariat: NEN
Gaz naturel — Vocabulaire
Voting begins on:
ICS: 75.060; 01.040.75
Voting terminates on:
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
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BE CONSIDERED IN THE LIGHT OF THEIR
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Published in Switzerland Reference number
ISO/DIS 14532:2025(en)
ii
ISO/DIS 14532:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
Annex A (Normative) List of terms defined in ISO/IEC Guide 98-3 and ISO/IEC Guide 99 .19
Bibliography .21
iii
ISO/DIS 14532:2025(en)
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 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee 193, Natural gas.
This third edition cancels and replaces the second edition (ISO 14532:2014), which has been technically
revised.
The main changes are as follows:
— All general and well known terms that are not specific for natural gas and can be found in publicly
available sources have been deleted.
— All terms that are too specific to a certain topic in the field of natural gas have been deleted.
— Some definitions have been modified, generalized with the aim to avoid becoming too specific to a
certain topic in the field of natural gas.
— Relevant terms from all ISO/TC 193 standards published since 2014 have been added.
— All terms are listed in alphabetical order.
— The Annex containing the alphabetical index has been deleted.
— The Annex containing the indices, symbols and units has been deleted.
— An Annex containing a list of terms defined in ISO/IEC Guide 98-3:2008 Uncertainty of measurement
(GUM) or ISO/IEC Guide 99:2007 International vocabulary of metrology (VIM) has been added.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
ISO/DIS 14532:2025(en)
Introduction
ISO/TC 193 Natural Gas has been established in May 1988, its current scope being:
— to standardize terminology, quality specifications, methods of measurement, sampling, analysis, and
testing including thermophysical property calculation and measurement, for
— natural gas
— natural gas substitutes
— mixtures of natural gas with other gaseous fuels (such as unconventional and renewable gases), and
— wet gas
in all its facets from production to delivery to all possible end users across national boundaries.
— to standardize methods of analysis of liquefied natural gas (LNG).
As the aim is to create a coherent body of standards which support each other with regard to their
definitions, common and unambiguous terms and definitions used throughout all International Standards is
the starting point for the understanding and application of every International Standard.
The definitive intention of this document is to incorporate the reviewed definitions into the ISO/TC 193
standards.
The presentation of this document has been arranged to facilitate its use as follows:
— All terms are listed in alphabetical order
— Notes are given under numerous definitions where it was deemed important to give informative guidance
for a given definition. The Notes are not considered a part of the definition.
The terms and definitions have been reviewed and studied in order to cover all aspects of any particular
term with input from other sources such as European Standards from CEN (The European Committee for
Standardization), standards from ASTM, national standards, and existing definitions in the IGU Dictionary
of the Gas Industry.
v
DRAFT International Standard ISO/DIS 14532:2025(en)
Natural gas — Vocabulary
1 Scope
This document establishes the terms and definitions, used in the field of natural gas, natural gas substitutes,
mixtures of natural gas with gaseous fuels (such as unconventional and renewable gases) and wet gas.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
absorption
retention, by physical or chemical forces of gas molecules, dissolved substances, or liquids by the bulk of
solids or liquids with which they are in contact
Note 1 to entry: The process causes (or is accompanied by) a physical or chemical change, or both, in the sorbent
material.
EXAMPLE Retention of siloxanes by charcoal.
3.2
adsorption
retention, by physical or chemical forces of gas molecules, dissolved substances, or liquids by the surface of
solids or liquids with which they are in contact
EXAMPLE Retention of methane by carbon.
[SOURCE: ISO 10715:2022, 3.2]
3.3
amount of substance fraction
amount fraction
mole fraction
quotient of amount of substance of a component and total amount of substance in the mixture
[SOURCE: ISO 80000-9, 9.13, modified. Original definition: for substance X in a mixture, quotient of amount
of substance nX of X and total amount n of substance in the mixture: X = n /n]
x x
3.4
analysis function
analyte content expressed as a function of instrumental response
[SOURCE: ISO 6143:2001]
ISO/DIS 14532:2025(en)
3.5
assigned value
value attributed to a particular property of a proficiency test item
[SOURCE: ISO 6974-3:2018, 3.11]
3.6
availability (of a measuring system or instrument)
probability, at any time, that the measuring system, or a measuring instrument forming part of the measuring
system, is functioning according to specifications
[SOURCE: ISO 15112:2018, 3.4]
3.7
biogas
gas, comprising principally methane and carbon dioxide, obtained from the anaerobic digestion of biomass
[SOURCE: EN 16723-1:2016, 3.1]
3.8
biomass
biological material from living, or recently living organisms, typically this may be plants or plant-derived
materials
[SOURCE: EN 16723-1:2016, 3.2]
3.9
biomethane
gas comprising principally methane, obtained from either upgrading of biogas or methanation of bio-syngas
[SOURCE: EN 16723-1:2016, 3.3]
3.10
bracketing
establishment of a straight-line calibration function using two calibration points defining a range
Note 1 to entry: The range is established so that the content of a component is expected to lie between the contents of
the component in the calibration gas mixtures.
3.11
bridge component
component selected to allow the combination of results for components measured by different analytical
operations
[SOURCE: ISO 6974-1:2012, 3.18, modified – ‘Bridging’ between the words ‘combination’ and ‘of’ has been
deleted.]
3.12
bubble pressure
pressure at which an infinitesimal amount of vapour is in equilibrium with a bulk liquid for a specified
temperature
[SOURCE: ISO 20765-2:2015, 3.1]
3.13
bubble temperature
temperature at which an infinitesimal amount of vapour is in equilibrium with a bulk liquid for a specified
pressure
[SOURCE: ISO 20765-2:2015, 3.2]
ISO/DIS 14532:2025(en)
3.14
calculated methane number
MN
C
numerical rating index obtained by a calculation, indicating the knock resistance of a gaseous fuel, according
to ISO 17507-1
Note 1 to entry: This analytical estimate of a methane number is based on using volume fraction gaseous fuel
composition as input.
[SOURCE: ISO/DIS 17507-1:2024, 3.2]
3.15
calibration function
instrumental response expressed as a function of analyte content
[SOURCE: ISO/DIS 6143:2024, 3.4.1]
3.16
calibration gas mixture
gas mixture of known stability and homogeneity whose composition is wel
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