EN ISO 2615:2024
(Main)Analysis of natural gas - Biomethane - Determination of the content of compressor oil (ISO 2615:2024)
Analysis of natural gas - Biomethane - Determination of the content of compressor oil (ISO 2615:2024)
This document gives general guidance for the sampling and gas chromatographic analysis of compressor oil in biomethane or compressed natural gas (CNG). The compressor oil mass fraction is determined by sampling on coalescing filters under defined operational conditions (the two first cubic meters of gas referring to standard conditions, delivered at a refuelling station).
Compressor oils are lubricants used in mechanical devices where the purpose is to reduce the volume and increase the pressure of gases for use in a variety of applications.
The method is solely applicable to compressed gas (p>18 MPa).
The compressor oil content is expressed as mass fraction. The scope of this method is from 3 mg/kg – 30 mg/kg.
Erdgas - Analyse von Biomethan - Bestimmung des Gehalts an Verdichteröl (ISO 2615:2024)
Dieses Dokument enthält einen allgemeinen Leitfaden für die Probenahme und gaschromatographische Analyse von Verdichteröl in Biomethan oder komprimiertem Erdgas (CNG, en: compressed natural gas). Der Massenanteil des Verdichteröls wird durch Probenahme auf Koaleszenzfiltern unter festgelegten Betriebsbedingungen (die ersten beiden Kubikmeter Gas, die unter Standardbedingungen an einer Tankstelle abgegeben werden) bestimmt.
Verdichteröle sind Schmiermittel, die in mechanischen Geräten verwendet werden und deren Zweck es ist, das Volumen von Gasen zu reduzieren und deren Druck zu erhöhen, um sie für eine Vielzahl von Anwendungen zu nutzen.
Das Verfahren ist ausschließlich auf komprimiertes Gas (p > 18 MPa) anwendbar.
Der Gehalt an Verdichteröl wird als Massenanteil angegeben. Der Anwendungsbereich dieses Verfahrens liegt zwischen 3 mg/kg und 30 mg/kg.
Analyse du gaz naturel - Biométhane - Détermination de la teneur en huile de compresseur (ISO 2615:2024)
Le présent document fournit des recommandations générales relatives au prélèvement et à l'analyse par chromatographie en phase gazeuse de l'huile de compresseur présente dans le biométhane ou dans le gaz naturel comprimé (GNC). La fraction massique de l'huile de compresseur est déterminée par prélèvement sur des filtres coalescents dans des conditions d'exploitation définies (les deux premiers mètres cubes de gaz dans les conditions standard, fournis à une station de ravitaillement).
Les huiles de compresseur sont des lubrifiants utilisés dans les dispositifs mécaniques, dont le but est de réduire le volume et d'augmenter la pression des gaz pour une variété d'applications.
La méthode est uniquement applicable aux gaz comprimés (p>18 MPa).
La teneur en huile de compresseur est exprimée en tant que fraction massique. Le domaine d'application de la présente méthode est compris entre 3 mg/kg et 30 mg/kg.
Analiza zemeljskega plina - Biometan - Določanje vsebnosti kompresorskega olja (ISO 2615:2024)
Ta dokument podaja splošne smernice za vzorčenje in analizo prenosa olja v biometanu ali stisnjenem zemeljskem plinu (CNG) s plinsko kromatografijo. Prenos olja se določi z vzorčenjem na koalescentnih filtrih pod določenimi delovnimi pogoji (dva prva normalna kubična metra, dobavljena na črpalki za oskrbo z gorivom). Prenos olja je izražen kot koncentracija; razpon te metode je od 3 mg/kg do 30 mg/kg.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2024
Analiza zemeljskega plina - Biometan - Določanje vsebnosti kompresorskega olja
(ISO 2615:2024)
Analysis of natural gas - Biomethane - Determination of the content of compressor oil
(ISO 2615:2024)
Erdgas - Analyse von Biomethan - Bestimmung des Gehalts an Verdichterö (ISO
2615:2024)
Analyse du gaz naturel - Biométhane - Détermination de la teneur en huile de
compresseur (ISO 2615:2024)
Ta slovenski standard je istoveten z: EN ISO 2615:2024
ICS:
71.040.50 Fizikalnokemijske analitske Physicochemical methods of
metode analysis
75.060 Zemeljski plin Natural gas
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 2615
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2024
EUROPÄISCHE NORM
ICS 75.060
English Version
Analysis of natural gas - Biomethane - Determination of
the content of compressor oil (ISO 2615:2024)
Analyse du gaz naturel - Biométhane - Détermination Erdgas - Analyse von Biomethan - Bestimmung des
de la teneur en huile de compresseur (ISO 2615:2024) Gehalts an Verdichterö (ISO 2615:2024)
This European Standard was approved by CEN on 15 April 2024.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 2615:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 2615:2024) has been prepared by Technical Committee ISO/TC 193 "Natural
gas" in collaboration with Technical Committee CEN/TC 408 “Natural gas and biomethane for use in
transport and biomethane for injection in the natural gas grid” the secretariat of which is held by
AFNOR.
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 November 2024, and conflicting national standards
shall be withdrawn at the latest by November 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 2615:2024 has been approved by CEN as EN ISO 2615:2024 without any modification.
International
Standard
ISO 2615
First edition
Analysis of natural gas —
2024-04
Biomethane — Determination of the
content of compressor oil
Analyse du gaz naturel — Biométhane — Détermination de la
teneur en huile de compresseur
Reference number
ISO 2615:2024(en) © ISO 2024
ISO 2615:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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Published in Switzerland
ii
ISO 2615:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Chemicals and materials . 2
5.1 Compressor oils .2
5.2 Solvent .3
5.3 Sampling filters .3
5.4 Backup filters .3
5.5 Calibration standards .3
5.6 Nitrogen pure gas .3
5.7 Compressed liquid propane .3
6 Apparatus . 3
6.1 Gas chromatograph .3
6.2 Capillary column .3
6.3 Ultrasonic bath .3
6.4 Pressurised fluid extraction apparatus .3
6.5 Filter housing .4
6.6 Rotary evaporator, concentration apparatus .4
6.7 Laboratory glassware .4
7 Sampling . 4
7.1 Sampling apparatus .4
7.2 Sampling steps .4
8 Methods to recover the oil from the buffer tank . 5
9 Extraction procedure for coalescing filters . 5
9.1 Procedure 1: Ultrasonic extraction – nitrogen flush .5
9.2 Procedure 2: Pressurised fluid extraction .5
10 Analysis . . 6
10.1 GC/MS analysis.6
10.2 GC/FID analysis .6
11 Calculations . 6
12 Test report . 7
Annex A (informative) Example of a GC/MS chromatogram obtained for a compressor oil
(Figure A.1) . 8
Annex B (informative) Example of a GC/FID chromatogram obtained for a compressor oil
(Figure B.1) . 9
Annex C (informative) Different types of oils .11
Bibliography .13
iii
ISO 2615:2024(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,
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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 document 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
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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 ISO/TC 193, Natural gas, Subcommittee SC 1, Analysis
of natural gas, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 408, Natural gas and biomethane for use in transport and biomethane for injection in the natural gas
grid, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
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 2615:2024(en)
Introduction
This document supports the implementation of specifications for biomethane and biogas such as
[9],[10]
ISO 15403-1 or the EN 16723 series when used in the natural gas grids and when used as a transport
fuel. Implementation of these specifications require fit-for-purpose measurement methods with known
performance and acceptable metrological traceability to support the trade in renewable gases and
conformity assessment.
v
International Standard ISO 2615:2024(en)
Analysis of natural gas — Biomethane — Determination of the
content of compressor oil
1 Scope
This document gives general guidance for the sampling and gas chromatographic analysis of compressor
oil in biomethane or compressed natural gas (CNG). The compressor oil mass fraction is determined
by sampling on coalescing filters under defined operational conditions (the two first cubic meters of gas
referring to standard conditions, delivered at a refuelling station).
Compressor oils are lubricants used in mechanical devices where the purpose is to reduce the volume and
increase the pressure of gases for use in a variety of applications.
The method is solely applicable to compressed gas (p>18 MPa).
The compressor oil content is expressed as mass fraction. The scope of this method is from 3 mg/kg – 30 mg/kg.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in
me a s ur ement (GUM: 1995)
ISO 6974 (all parts), Natural gas — Determination of composition and associated uncertainty by gas
chromatography
ISO 6976, Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from
composition
ISO/IEC 17025:2017, General requirements for the competence of testing and calibration laboratories
ISO 14532, Natural gas — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions g
...
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