SIST EN ISO 9038:2025
(Main)Determination of sustained combustibility of liquids (ISO 9038:2025)
Determination of sustained combustibility of liquids (ISO 9038:2025)
This document specifies a procedure, at temperatures up to 100 °C, to determine whether a liquid product, that would be classified as “flammable” by virtue of its flash point, sustains combustion at the temperature(s) specified, for example, in regulations.
NOTE Many national and international regulations classify liquids as presenting a flammable hazard based on their flash point, as determined by a recognized method. Some of these regulations allow a derogation if the substance cannot “sustain combustion” at some specified temperature(s).
The procedure is applicable to paints (including water-borne paints), varnishes, paint binders, solvents, petroleum or related products and adhesives, that have a flash point. It is not applicable to painted surfaces in respect of assessing their potential fire hazards.
This test method is applicable, in addition to test methods for flash point, for assessing the fire hazard of a product.
Bestimmung der Weiterbrennbarkeit von Flüssigkeiten (ISO 9038:2025)
Dieses Dokument legt ein Verfahren für Temperaturen bis zu 100 °C fest, mit dem bestimmt wird, ob ein flüssiges Produkt, das auf Grund seines Flammpunktes als „entzündbar“ eingestuft würde, bei der/den zum Beispiel in Vorschriften angegebenen Temperatur/en selbstunterhaltend weiterbrennt.
ANMERKUNG In vielen nationalen und internationalen Vorschriften wird die Entzündungsgefahr von Flüssigkeiten nach ihrem mit einem anerkannten Verfahren bestimmten Flammpunkt klassifiziert. Einige dieser Vorschriften erlauben eine Ausnahme, wenn die Flüssigkeit bei einer bestimmten Temperatur oder bei bestimmten Temperaturen nicht „weiterbrennt“.
Das Verfahren ist anwendbar auf Beschichtungsstoffe (einschließlich wasserverdünnbarer Beschichtungs-stoffe), Klarlacke, Lackbindemittel, Lösemittel, Mineralöl- oder ähnliche Produkte und Klebstoffe, die einen Flammpunkt haben. Es ist nicht zum Beurteilen der Brandgefahr beschichteter Oberflächen anwendbar.
Zusätzlich zur Bestimmung des Flammpunktes ist dieses Prüfverfahren zum Beurteilen der Brandgefahr eines Produktes anwendbar.
WARNUNG — Die Anwendung dieses Dokuments kann den Einsatz gefährlicher Stoffe, Verfahren und Geräte vorsehen. In diesem Dokument werden nicht alle mit ihrer Anwendung verbundenen Fragen zur Sicherheit angesprochen. Es liegt in der Verantwortung des Anwenders dieses Dokuments, vor seiner Anwendung geeignete Maßnahmen für die Sicherheit und den Gesundheitsschutz des Personals zu ergreifen und zu diesem Zweck die Gültigkeit etwaiger anderer Einschränkungen zu bestimmen.
Essai de détermination de la combustion entretenue de liquides (ISO 9038:2025)
Le présent document spécifie un mode opératoire, applicable à des températures allant jusqu’à 100 °C, qui vise à déterminer si la combustion d’un produit liquide, qui serait classé comme «inflammable» du fait de son point d’éclair, s’entretient à la température ou aux températures spécifiées, par exemple dans les règlements.
NOTE Dans de nombreux règlements nationaux et internationaux, les liquides sont classés selon le danger d’inflammabilité qu’ils présentent en fonction de leur point d’éclair, ce dernier ayant été déterminé au moyen d’une méthode reconnue. Une dérogation est accordée dans certains de ces règlements si «la combustion» de la substance en question ne peut pas «être entretenue» à une ou plusieurs températures spécifiées.
Ce mode opératoire est applicable aux peintures (y compris peintures en phase aqueuse), vernis, liants pour peinture, solvants, produits pétroliers ou produits connexes et adhésifs, qui ont un point d’éclair. Il ne s’applique pas à l’évaluation du danger potentiel d’incendie que présentent les surfaces peintes.
La présente méthode d’essai est applicable, en complément de celles qui portent sur le point d’éclair, à l’estimation du danger d’incendie d’un produit.
Določanje neprekinjene gorljivostii tekočin (ISO 9038:2025)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2025
Nadomešča:
SIST EN ISO 9038:2021
Določanje neprekinjene gorljivostii tekočin (ISO 9038:2025)
Determination of sustained combustibility of liquids (ISO 9038:2025)
Bestimmung der Weiterbrennbarkeit von Flüssigkeiten (ISO 9038:2025)
Essai de détermination de la combustion entretenue de liquides (ISO 9038:2025)
Ta slovenski standard je istoveten z: EN ISO 9038:2025
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
87.040 Barve in laki Paints and varnishes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 9038
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 13.220.40; 87.040; 87.060.01 Supersedes EN ISO 9038:2021
English Version
Determination of sustained combustibility of liquids (ISO
9038:2025)
Essai de détermination de la combustion entretenue de Bestimmung der Weiterbrennbarkeit von Flüssigkeiten
liquides (ISO 9038:2025) (ISO 9038:2025)
This European Standard was approved by CEN on 2 November 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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9038:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 9038:2025) has been prepared by Technical Committee ISO/TC 28 "Petroleum
and related products, fuels and lubricants from natural or synthetic sources" in collaboration with
Technical Committee CEN/TC 139 “Paints and varnishes” the secretariat of which is held by DIN.
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 August 2025, and conflicting national standards shall
be withdrawn at the latest by August 2025.
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 supersedes EN ISO 9038:2021.
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 9038:2025 has been approved by CEN as EN ISO 9038:2025 without any modification.
International
Standard
ISO 9038
Fourth edition
Determination of sustained
2025-02
combustibility of liquids
Essai de détermination de la combustion entretenue de liquides
Reference number
ISO 9038:2025(en) © ISO 2025
ISO 9038:2025(en)
© ISO 2025
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
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Published in Switzerland
ii
ISO 9038:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
6 Preparation of apparatus and verification . 3
7 Sampling . 3
7.1 Paints, varnishes and related products .3
7.2 Petroleum and related products .3
7.2.1 Sampling procedure .3
7.2.2 Sample handling .3
8 Procedure . 4
9 A ssessment of results . 5
10 Calculation of the adjusted test temperature . 6
11 Precision . 6
12 Test report . 6
Annex A (normative) Combustibility tester. 7
Annex B (normative) Apparatus verification . .10
Bibliography .11
iii
ISO 9038:2025(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 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
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 ISO/TC 28, Petroleum and related products, fuels
and lubricants from natural or synthetic sources, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 139, Paints and varnishes, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This fourth edition cancels and replaces the third edition (ISO 9038:2021), which has been technically
revised.
The main changes are as follows:
— 8.6 and 8.7 have been revised; Warnings have been added in 8.6 to give improved advice to the operator
on possible ignition and burning scenarios that can be met during the test.
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 9038:2025(en)
Introduction
A product with a flash point within a given range can continue to burn after initial ignition, while a similar
product, although it has a similar flash point, does not continue to burn. This document describes a method
for discriminating between those products that sustain combustion and those that do not.
The method determines whether a flammable product, when maintained at a selected test temperature,
generates sufficient flammable vapour to cause ignition when an ignition source is applied and then
continues to generate sufficient vapour to burn when the ignition source is moved to the “off” position.
This test method does not determine the flash point of the product under test but, by means of a test
procedure, merely determines if it sustains combustion at a selected test temperature; this criterion can
be required to comply with laws or regulations relating to the storage, transport and use of flammable
products. Before performing this test, for safety a
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