EN ISO 14935:2020

Petroleum and related products - Determination of wick flame persistence of fire-resistant fluids (ISO 14935:2020)

This document specifies a method for the assessment of the persistence of a flame applied to the edge of a wick of non-flammable material immersed in fire-resistant fluid.
This test does not determine the behaviour of a spray of fire-resistant fluid.
NOTE   Such test methods are specified in ISO 15029-1 and ISO 15029-2.
This document specifies one of four basic tests for determining flammability.
This document does not apply to certain liquids such as HFAE and HFAS liquids.

Mineralölerzeugnisse und verwandte Produkte - Bestimmung der Nachbrennzeit schwer entflammbarer Flüssigkeiten an einem Docht (ISO 14935:2020)

Dieses Dokument legt ein Verfahren zur Beurteilung der Nachbrennzeit einer Flamme fest, die auf die Kante eines Dochts aus nicht entflammbarem Werkstoff, der in eine schwer entflammbare Flüssigkeit getaucht ist, einwirkt.
Diese Prüfung bestimmt nicht das Verhalten einer versprühten schwer entflammbaren Flüssigkeit.
ANMERKUNG   Derartige Prüfungen sind in ISO 15029 1 und ISO 15029 2 festgelegt.
Dieses Dokument legt eine von vier grundlegenden Prüfungen zur Bestimmung der Entflammbarkeit fest.
Dieses Dokument gilt nicht für bestimmte Flüssigkeiten wie solche der Kategorien HFAE und HFAS.

Pétrole et produits connexes - Détermination de la persistance d'une flamme sur une mèche trempée dans un fluide difficilement inflammable (ISO 14935:2020)

Le présent document spécifié une méthode d'évaluation de la persistance d'une flamme appliquée à l'extrémité d'une mèche en matière ignifugée, trempée dans un fluide difficilement inflammable.
Cet essai ne permet pas de déterminer les caractéristiques d'inflammation des fluides difficilement inflammables en jet pulvérisé.
NOTE       Les méthodes qui permettent de déterminer ces caractéristiques sont spécifiées dans les ISO 15029‑1 et ISO 15029‑2.
Le présent document spécifie l'une des quatre méthodes qui permettent de déterminer l'inflammabilité des fluides difficilement inflammables.
Le présent document ne s'applique pas à certains fluides tels que les fluides HFAE et HFAS.

Naftni in sorodni proizvodi - Določevanje trajanja gorenja stenja v ognjeodporni tekočini (ISO 14935:2020)

General Information

• Status: Published
• Publication Date: 28-Apr-2020
• Withdrawal Date: 30-Oct-2020
• ICS: 75.080 - Petroleum products in general
• Technical Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Drafting Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 29-Apr-2020
• Completion Date: 29-Apr-2020
• Ref Project: SIST EN ISO 14935:2020 - Petroleum and related products - Determination of wick flame persistence of fire-resistant fluids (ISO 14935:2020)

Relations

• Replaces: EN ISO 14935:1998 - Petroleum and related products - Determination of wick flame persistence of fire-resistant fluids (ISO 14935:1998)
• Effective Date: 11-May-2020

Overview

EN ISO 14935:2020 (ISO 14935:2020) specifies a laboratory test method for assessing the wick flame persistence of fire‑resistant fluids used in petroleum‑related applications. The method measures how long a flame continues to burn on the exposed edge of a non‑flammable wick (aluminosilicate plate) after removal of an igniting flame. This standard is published by CEN/ISO and supersedes the 1998 edition. It is one of four basic flammability tests and is commonly referenced in specifications for fire‑resistant hydraulic fluids (e.g., ISO 12922).

Key Topics and Requirements

• Scope and exclusions: Applies to fluids immersed on a non‑flammable wick; does not evaluate spray behaviour and excludes certain liquids such as HFAE and HFAS.
• Test principle: Soak an aluminosilicate test plate in the fluid, expose one edge to a small propane flame, then measure after‑burning time once the igniting flame is removed.
• Exposure times and repetitions: Tests use five exposure durations (2 s, 5 s, 10 s, 20 s, 30 s); each exposure time is repeated six times and the mean persistence is calculated. The highest mean of the five is reported as the mean duration of continued burning.
• Apparatus and materials:
  • Reservoir (brass) dimensions (200 × 25 × 20 mm) with specific clamping positions.
  • Test plate: aluminosilicate, width 25 ±1 mm, thickness 2 ±0.2 mm, length ~195 mm.
  • Burner with a 0.6 mm nozzle using commercial propane (ISO 9162).
• Standards referenced: Normative references include ISO 3170 (sampling) and ISO 9162 (propane quality). Related test methods for sprays are given in ISO 15029‑1 and ISO 15029‑2.
• Reporting and safety: Test report requirements, calculation of means, and explicit safety warnings are included.

Applications and Users

• Who uses it:
  • Test laboratories and certification bodies performing flammability testing.
  • Manufacturers and formulators of fire‑resistant hydraulic fluids and related petroleum products.
  • Quality assurance, R&D, procurement, and compliance teams evaluating fluid performance against industry specifications.
• Practical uses:
  • Screening and classification of hydraulic fluids for industrial applications.
  • Supporting product specifications and regulatory compliance (e.g., inclusion in ISO 12922 fluid requirements).
  • Comparative testing during product development and quality control.

Related Standards

• ISO 15029‑1 and ISO 15029‑2 - spray flammability test methods (not covered by EN ISO 14935).
• ISO 12922 - specifications for flame‑retardant and less‑flammable hydraulic fluids.
• ISO 3170 - manual sampling of petroleum liquids.
• ISO 9162 - propane quality for test burners.

Keywords: EN ISO 14935:2020, ISO 14935, wick flame persistence, fire‑resistant fluids, flammability test, petroleum and related products, wick test, hydraulic fluid testing.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2020
Nadomešča:
SIST EN ISO 14935:1999
Naftni in sorodni proizvodi - Določevanje trajanja gorenja stenja v ognjeodporni
tekočini (ISO 14935:2020)
Petroleum and related products - Determination of wick flame persistence of fire-
resistant fluids (ISO 14935:2020)
Mineralölerzeugnisse und verwandte Produkte - Bestimmung der Nachbrennzeit schwer
entflammbarer Flüssigkeiten an einem Docht (ISO 14935:2020)
Pétrole et produits connexes - Détermination de la persistance d'une flamme sur une
mèche trempée dans un fluide difficilement inflammable (ISO 14935:2020)
Ta slovenski standard je istoveten z: EN ISO 14935:2020
ICS:
75.080 Naftni proizvodi na splošno Petroleum products in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 14935
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2020
EUROPÄISCHE NORM
ICS 75.080 Supersedes EN ISO 14935:1998
English Version
Petroleum and related products - Determination of wick
flame persistence of fire-resistant fluids (ISO 14935:2020)
Pétrole et produits connexes - Détermination de la Mineralölerzeugnisse und verwandte Produkte -
persistance d'une flamme sur une mèche trempée dans Bestimmung der Nachbrennzeit schwer entflammbarer
un fluide difficilement inflammable (ISO 14935:2020) Flüssigkeiten an einem Docht (ISO 14935:2020)
This European Standard was approved by CEN on 13 March 2020.

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, Turkey 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14935:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 14935:2020) 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 19 “Gaseous and liquid fuels, lubricants and related products of
petroleum, synthetic and biological origin.” the secretariat of which is held by NEN.
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 October 2020, and conflicting national standards shall
be withdrawn at the latest by October 2020.
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 14935:1998.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 14935:2020 has been approved by CEN as EN ISO 14935:2020 without any modification.

INTERNATIONAL ISO
STANDARD 14935
Second edition
2020-04
Petroleum and related products —
Determination of wick flame
persistence of fire-resistant fluids
Pétrole et produits connexes — Détermination de la persistance
d'une flamme sur une mèche trempée dans un fluide difficilement
inflammable
Reference number
ISO 14935:2020(E)
©
ISO 2020
ISO 14935:2020(E)
© ISO 2020
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 or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 14935:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents and materials . 2
6 Apparatus . 2
7 Samples and sampling . 5
8 Preparation of apparatus . 5
9 Procedure. 5
10 Calculation . 6
11 Expression of results . 6
12 Precision . 6
13 Test report . 7
Bibliography . 8
ISO 14935:2020(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 (see 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 (see 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.
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 19, Gaseous and liquid fuels, lubricants and related
products of petroleum, synthetic and biological origin, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 14935:1998), which has been technically
revised. The main changes compared to the previous edition are as follows:
— material data of the reservoir have been changed;
— some designations have been changed;
— drawings have been revised;
— tolerances in ignition and dropping times and nozzle dimensions have been tightened for better
accuracy.
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 2020 – All rights reserved

ISO 14935:2020(E)
Introduction
This document was originally developed by CEN under a mandate from the European Commission.
The t
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