kSIST FprEN ISO 9994:2026

• Abstract:

  This document specifies requirements for lighters to ensure a reasonable degree of safety for normal use or reasonably foreseeable misuse of such lighters by users.; This document applies to all flame-producing products commonly known as cigarette lighters, cigar lighters and pipe lighters.; It does not apply to matches and flame-producing products intended solely for igniting materials other than cigarettes, cigars, and pipes.

• Status: Not Published
• Public Enquiry End Date: 30-Jan-2026
• ICS: 97.180 - Miscellaneous domestic and commercial equipment
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 06-Aug-2026
• Due Date: 24-Sep-2026
• Completion Date: 20-Aug-2026
• Directive: 2001/95/EC - General product safety
• Directive:

  ---

  2023/988/EU - Regulation (EU) 2023/988 of the European Parliament and of the Council of 10 May 2023 on general product safety, amending Regulation (EU) No 1025/2012 of the European Parliament and of the Council and Directive (EU) 2020/1828 of the European Parliament and the Council, and repealing Directive 2001/95/EC of the European Parliament and of the Council and Council Directive 87/357/EEC
• Mandate: M/266 - Standardization mandate to CEN in the field of the safety of consumers and children related to lighters
• Ref Project: FprEN ISO 9994 - Lighters - Safety specifications (ISO/FDIS 9994:2026)

• Revises: SIST EN ISO 9994:2019 - Lighters - Safety specification (ISO 9994:2018)
• Effective Date: 25-Oct-2023

kSIST FprEN ISO 9994:2026 is the SIST publication of ISO 9994 on lighter safety specifications. It specifies safety requirements and test methods for cigarette lighters, cigar lighters and pipe lighters intended for normal use and reasonably foreseeable misuse. Manufacturers, test laboratories, quality teams and buyers use it to check flame behavior, fuel containment, instructions and product marking.

What does kSIST FprEN ISO 9994:2026 specify?

kSIST FprEN ISO 9994:2026 sets safety rules for flame-producing lighters and explains how to verify them. The scope covers lighters for cigarettes, cigars and pipes, and excludes matches and flame-producing products intended only for lighting other materials.

The document is organized into these main parts:

• Clause 1 - Scope
• Clause 2 - Normative references
• Clause 3 - Terms and definitions
• Clause 4 - Functional requirements
• Clause 5 - Structural integrity requirements
• Clause 6 - Test methods
• Clause 7 - Instructions and warnings
• Clause 8 - Product marking

Annex	What it covers
Annex A	Test sequencing and minimum sampling size
Annex B	Reported distribution of maximum flame heights of postmixing adjustable refillable and non-refillable lighters

What are the key requirements of kSIST FprEN ISO 9994:2026?

kSIST FprEN ISO 9994:2026 focuses on three practical controls: the lighter must be hard to ignite by accident, the flame must stay within safe limits, and the body and fuel system must survive common abuse. It also requires clear warnings and product identification so users know how to handle the lighter safely.

Flame generation and flame control

Clause 4.1 requires deliberate manual operation to produce a flame. That means the lighter must not light too easily in a pocket or bag, and the user must either make a positive action, carry out two independent actions, or apply at least 15 N of actuating force.

Clause 4.2 limits flame height according to lighter type. Non-adjustable fluid lighters are limited to 120 mm, while non-adjustable gas lighters are limited to 50 mm. Adjustable lighters have separate limits for first ignition and for user-set maximum flame height, and automatically adjusting pipe lighters are limited to 100 mm in any position.

Clause 4.3 requires the user to deliberately change the flame height, and the direction of movement must be shown near the control. If the control projects from the body, it must need at least 1 N over the full adjustment range. In practice, this reduces accidental flame changes and makes the control direction clear to the user.

Clause 4.4 requires gas lighters at maximum flame height to avoid spitting, sputtering or flaring. Clause 4.5 sets extinction times after the lighter is shut off in the intended way, so the flame goes out quickly enough to reduce afterburn and burn injury risk.

Fuel containment and structural integrity

Clauses 4.6 and 4.7 limit filled gas lighters shipped with fuel. The liquid portion of the fuel may not exceed 85 % of reservoir volume, and the mass of liquefied fuel may not exceed 10 g. That matters because excess fill increases leakage and pressure risk.

Clause 5.1 requires no dangerous sharp external edges, and a suspect edge is checked against UL 1439. Clauses 5.2 and 5.3 cover fuel compatibility and fuel loss: parts in contact with the recommended fuel must not deteriorate, and refillable gas lighter seals and valves must keep gas escape within the stated limit. For buyers and quality teams, this is the section that protects against leaks, seal failure and material attack over time.

Clause 5.4 requires lighters to survive three drops from 1.5 m in different orientations without rupture, leakage or sustained self-ignition. Clause 5.5 adds a 65 °C elevated-temperature check, and Clause 5.6 checks gas lighter reservoirs against internal pressure based on the fuel vapour pressure at 55 °C. These tests simulate heat, handling and transport stresses that can trigger failures in use.

Clause 5.7 checks burning behaviour at 45° below horizontal, Clause 5.8 checks cyclic burning for repeated short burns, and Clause 5.9 checks continuous burning for 2 min. These clauses matter because a lighter may be used in awkward positions or held lit longer than expected, and the document asks whether that causes distortion, component ejection or other hazardous conditions.

User information and marking

Clause 7 requires safety information with every lighter, either as text or as approved signs. The information must be easy to notice and placed on the lighter, the consumer package, a leaflet, or, for tray and display sales, on the selling display itself.

The text warnings cover general cautions such as keeping the lighter away from children, lighting away from face and clothing, not exposing it to heat or sunlight, and not puncturing or burning it. Type-specific warnings add instructions for gas lighters, fluid lighters, premixing burners, postmixing burners and non-self-extinguishing lighters.

Clause 8 requires each lighter to carry a permanent logo, brand or name that identifies the manufacturer or distributor. That supports traceability when products are audited, recalled or investigated.

What terms does kSIST FprEN ISO 9994:2026 define?

• Lighter - a manually operated flame-producing article that uses a petrochemical derivative as fuel and is normally used to light cigarettes, cigars and pipes.
• Fluid lighter - a lighter with an exposed wick that uses liquid hydrocarbons as fuel.
• Gas lighter - a lighter that uses liquefied hydrocarbons such as n-butane, isobutane or propane as fuel.
• Postmixing burner lighter - a gas lighter in which fuel and air meet at the point of combustion.
• Premixing burner lighter - a gas lighter in which fuel and air are mixed before combustion.
• Adjustable lighter - a lighter with a user-accessible mechanism for changing flame height.
• Flame height - the visible linear distance used to measure how high the flame reaches above the shield, wick or burner valve orifice.
• Self-extinguishing lighter - a lighter that needs continuous positive action to keep the flame burning and goes out when that action stops.

Who uses kSIST FprEN ISO 9994:2026?

kSIST FprEN ISO 9994:2026 is used by:

• lighter manufacturers and component suppliers who design the flame, fuel system and control mechanism
• test laboratories that perform flame-height, drop, pressure, burning and leakage tests
• quality managers who set acceptance checks for production and incoming parts
• importers and distributors who need evidence of product safety and correct marking
• packaging and label teams who prepare warnings, refilling instructions and product identification
• retailers selling consumer packs, trays or display formats that must carry safety information

What changed in kSIST FprEN ISO 9994:2026 from the previous edition?

kSIST FprEN ISO 9994:2026 is the sixth edition and cancels and replaces ISO 9994:2018. The document states these main changes:

• terms 3.1, 3.13 and 3.17 were modified
• terms 3.24 to 3.27 were added
• Clause 4.7 was modified
• flame-height requirements in 4.2.2.2 to 4.2.2.4 were modified
• fuel-loss and drop-test clauses 5.3.2, 5.3.3, 5.4.1 and 5.4.2 were modified
• Clause 6.1.2, 6.2.1.3 and 6.2.2.4 were modified
• Clause 6.3.2 was added and 6.3.3 was modified
• Clauses 6.6.1, 6.6.2, 6.6.3.2 and 6.6.3.3 were modified
• Clause 6.8.2.1 was modified
• Clause 7 was modified
• Annex A was modified
• Annex B was added

Which standards are used with kSIST FprEN ISO 9994:2026?

• ISO 7941, Commercial propane and butane - Analysis by gas chromatography - used when the fuel type and formulation must be identified to calculate density or vapour pressure for the fuel-volume and internal-pressure checks.
• UL 1439, Tests for Sharpness of Edges on Equipment - used if a possible sharp edge is found during the external finish check.

What does the kSIST FprEN ISO 9994:2026 document contain?

The document contains the test apparatus and step-by-step procedures for flame-height measurement, spitting/sputtering/flaring observation, flame extinction, fuel compatibility, refilling, volumetric fuel displacement, drop testing, elevated-temperature testing, internal-pressure testing, cyclic burning and continuous burning. It also includes the calculation steps used to compare fuel volume with reservoir capacity and to interpret pressure-related results.

Figures support the practical test set-ups, including the actuation force for flame generation, flame-control force, test positioning and the boards used to read flame behavior. Figures 5 to 9 present the safety signs and the website or code-based route to safety information.

Annex A gives the sampling plan and test sequencing, which matters for laboratories planning a conformity test program. Annex B provides reported market data on maximum flame heights for postmixing adjustable refillable and non-refillable lighters, giving context for the flame-height limits in Clause 4.

SLOVENSKI STANDARD
oSIST prEN ISO 9994:2026
01-januar-2026
Vžigalniki - Varnostna specifikacija (ISO/DIS 9994:2025)
Lighters - Safety specifications (ISO/DIS 9994:2025)
Feuerzeuge - Festlegungen für die Sicherheit (ISO/DIS 9994:2025)
Briquets - Spécifications de sécurité (ISO/DIS 9994:2025)
Ta slovenski standard je istoveten z: prEN ISO 9994
ICS:
97.180 Razna oprema za dom in Miscellaneous domestic and
trgovino commercial equipment
oSIST prEN ISO 9994:2026 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 9994:2026
oSIST prEN ISO 9994:2026
DRAFT
International
Standard
ISO/DIS 9994
ISO/TC 61/SC 4
Lighters — Safety specifications
Secretariat: BSI
Briquets — Spécifications de sécurité
Voting begins on:
2025-11-25
ICS: 97.180
Voting terminates on:
2026-02-17
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,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 9994:2025(en)
oSIST prEN ISO 9994:2026
DRAFT
ISO/DIS 9994:2025(en)
International
Standard
ISO/DIS 9994
ISO/TC 61/SC 4
Lighters — Safety specifications
Secretariat: BSI
Briquets — Spécifications de sécurité
Voting begins on:
ICS: 97.180
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 9994:2025(en)
ii
oSIST prEN ISO 9994:2026
ISO/DIS 9994:2025(en)
Contents  Page
Foreword .v
Introduction .vi
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Functional requirements . 4
4.1 Flame generation .4
4.2 Flame heights .5
4.2.1 Non-adjustable lighters .5
4.2.2 Adjustable lighters .6
4.2.3 Dual flame type lighter .6
4.2.4 Multiple flame type lighter .6
4.3 Flame-height adjustment .6
4.4 Resistance to spitting or sputtering and flaring .7
4.5 Flame extinction .7
4.6 Volumetric displacement of fuel . .8
4.7 Mass of fuel .8
5  Structural integrity requirements . 8
5.1 External finish .8
5.2 Compatibility with fuel .8
5.3 Resistance to fuel loss .9
5.4 Resistance to dropping .9
5.5 Resistance to elevated temperature .9
5.6 Resistance to internal pressure .9
5.7 Burning behaviour .10
5.8 Resistance to cyclic burning .10
5.9 Resistance to continuous burning.11
6  Test methods .11
6.1 Test specimens and test sequencing .11
6.1.1 Test specimens .11
6.1.2 Test sequencing .11
6.2 Flame height measurement .11
6.2.1 Apparatus .11
6.2.2 Procedure .11
6.3 Spitting, sputtering and flaring tests . 12
6.3.1 General . 12
6.3.2 Apparatus . 12
6.3.3 Procedure . 12
6.4 Flame extinction test . 13
6.4.1 Apparatus . 13
6.4.2 Procedure . 13
6.5 Fuel compatibility test .14
6.5.1 General .14
6.5.2 Apparatus .14
6.5.3 Procedure .14
6.6 Refilling test .16
6.6.1 General .16
6.6.2 Apparatus .16
6.6.3 Procedure .16
6.7 Volumetric fuel-displacement test .17
6.7.1 General .17
6.7.2 Test specimens .18
6.7.3 Apparatus .18

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oSIST prEN ISO 9994:2026
ISO/DIS 9994:2025(en)
6.7.4 Procedure .18
6.8 Drop test .19
6.8.1 General .19
6.8.2 Apparatus .19
6.8.3 Procedure .19
6.9 Elevated-temperature test . 20
6.9.1 General . 20
6.9.2 Apparatus . 20
6.9.3 Procedure .21
6.10 Internal-pressure test . 22
6.10.1 General . 22
6.10.2 Test specimens . 22
6.10.3 Apparatus . 22
6.10.4 Procedure . 22
6.11 Cyclic-burning-time test . . 23
6.11.1 General . 23
6.11.2 Procedure . 23
6.12 Continuous-burning-time test .24
6.12.1 General .24
6.12.2 Apparatus .24
6.12.3 Procedure .24
7  Instructions and warnings . .25
7.1 General . 25
7.2 Location . 25
7.3 Textual safety information . 25
7.4 Signs . 26
7.4.1 General . 26
7.4.2 Safety signs . 26
7.4.3 QR code or data matrix code or website address .27
7.5 Refilling instructions . 28
7.5.1 General . 28
7.5.2 Fluid lighters . 28
7.5.3 Gas lighters . 28
8  Product marking .28
Annex A (normative)  Test sequencing and minimum sampling size .29
Annex B  (normative)  Reported distribution of maximum flame heights of postmixing
adjustable refillable and non-refillable lighters .32

iv
oSIST prEN ISO 9994:2026
ISO/DIS 9994:2025(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 ISO/TC 61, Plastics, Subcommittee SC 4, Burning
behaviour.
This sixth edition cancels and replaces the fifth edition (ISO 9994:2018), which has been technically revised.
The main changes compared to the previous edition are as follows:
— Subclauses 3.1, 3.13 and 3.17 have been modified. Subclauses 3.24, 3.25, 3.26 and 3.27 have been added.
— Subclauses 4.2.2.2, 4.2.2.3 and 4.2.2.4 have been modified.
— Clause 4.7 has been modified.
— Subclauses 5.3.2 and 5.3.3 have been modified.
— Subclauses 5.4.1 and 5.4.2 have been modified.
— Subclause 6.1.2 has been modified.
— Subclauses 6.2.1.3 and 6.2.2.4 have been modified.
— Subclause 6.3.2 has been added. Subclauses 6.3.3 has been modified.
— Subclauses 6.6.1, 6.6.2 have been modified. Subclauses 6.6.3.2 and 6.6.3.3 have been added.
— Subclause 6.8.2.1 has been modified.
— Clause 7 has been modified.
— Annex A has been modified.
— Annex B 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.

v
oSIST prEN ISO 9994:2026
ISO/DIS 9994:2025(en)
Introduction
Lighters, being flame-producing articles, can, as do all flame sources, present a potential hazard to users.
The safety specifications given in this document cannot eliminate all hazards, but are intended to reduce
potential hazards to users.
This document is intended to be revised periodically to consider flame height reduction (see note in 4.2),
as well as improvements to other requirements such as flame stability, flame extinction, temperature
resistance, pressure resistance, refilling, markings and instructions and warnings.

vi
oSIST prEN ISO 9994:2026
DRAFT International Standard ISO/DIS 9994:2025(en)
Lighters — Safety specifications
WARNING — Persons using this document should be familiar with normal laboratory practice, if
applicable. This document does not purport to address all the safety concerns, if any, associated with
its use. It is the responsibility of the user to establish appropriate safety and health practices and to
determine the applicability of any other restrictions.
1  Scope
This document specifies requirements for lighters to ensure a reasonable degree of safety for normal use or
reasonably foreseeable misuse of such lighters by users.
This document applies to all flame-producing products commonly known as cigarette lighters, cigar lighters
and pipe lighters.
It does not apply to matches and flame-producing products intended solely for igniting materials other than
cigarettes, cigars, and pipes.
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 7941, Commercial propane and butane — Analysis by gas chromatography
UL 1439, Tests for Sharpness of Edges on Equipment
3  Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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
lighter
manually operated flame-producing article (3.24), employing a petrochemical derivative as a fuel, normally
used for deliberately igniting cigarettes, cigars and pipes, and which might foreseeably be used to ignite
(3.21) materials such as paper, wicks, candles and lanterns
Note 1 to entry: Lighters are specifically not intended for use as candles or as flashlights, or for other uses requiring
an extended burn time.
Note 2 to entry: Lighters are not considered substances (3.25), mixtures (3.26), a container with a substance or a
mixture, or a combination of article and substance/mixture.
Note 3 to entry: Lighters are not considered aerosol dispensers (3.27).

oSIST prEN ISO 9994:2026
ISO/DIS 9994:2025(en)
3.2
fluid lighter
lighter (3.1), with an exposed wick, that employs as fuel liquid hydrocarbons such as hexane whose gauge
vapour pressure at 24 °C does not exceed 34,5 kPa
3.3
gas lighter
lighter (3.1) that employs as fuel liquefied hydrocarbons such as n-butane, isobutane and propane whose
gauge vapour pressure at 24 °C exceeds 104 kPa
3.4
postmixing burner lighter
gas lighter (3.3) in which fuel is supplied for combustion and air is supplied at the point of combustion
3.5
premixing burner lighter
gas lighter (3.3) in which fuel and air are mixed before being supplied for combustion
3.6
non-refillable lighter
disposable lighter
lighter (3.1) marketed with an integral supply of fuel and that is not intended to be refilled with fuel
3.7
refillable lighter
lighter (3.1) intended to be refuelled either by transferring fuel from an external container or by inserting a
new prefilled fuel reservoir
3.8
adjustable lighter
lighter (3.1) provided with a mechanism for the user to vary the flame height (3.13)
3.9
non-adjustable lighter
lighter (3.1) that is not provided with a user-accessible mechanism to adjust the flame height (3.13)
Note 1 to entry: The flame height is preset by the manufacturer.
3.10
automatically adjusting pipe lighter
lighter (3.1) characterized by an automatic increase in flame height (3.13) when tilted from an upright
position, designed specifically for lighting pipes
3.11
self-extinguishing lighter
lighter (3.1) that, once ignited, requires continuous intentional and positive action to maintain a flame (3.20)
and that is subsequently extinguished by the termination of such positive action
3.12
non-self-extinguishing lighter
lighter (3.1) that, once ignited, does not require intentional or positive action by the user to maintain a flame
(3.20) and requires a subsequent deliberate user action to extinguish the flame
3.13
flame height
linear distance from the tip of the visible flame (3.20) to the top of the shield or, in the absence of a shield,
from the tip of the visible flame to the bottom of the exposed wick or the top of the burner valve orifice (3.16)
Note 1 to entry: Flame height as observed by the naked eye.

oSIST prEN ISO 9994:2026
ISO/DIS 9994:2025(en)
3.14
shield
structure that totally or partially surrounds the burner valve orifice (3.16) of a gas lighter (3.3) or the wick of
a fluid lighter (3.2)
3.15
burner valve
component of a gas lighter (3.3) which controls the release of fuel
3.16
burner valve orifice
tip of the burner valve (3.15) from which fuel is released
3.17
flaring
variation of flame height (3.13) from the steady-state flame condition
Note 1 to entry: Flaring as observed by the naked eye.
3.18
sustained self-ignition
propagation of a flame (3.20) by other than deliberate manual operation so as to cause the ignition element
to be activated and the flame to continue to burn
EXAMPLE By dropping the lighter.
3.19
spitting
sputtering
flame phenomenon of a gas lighter (3.3) wherein the escape of non-evaporated liquefied gas produces a
shower of burning liquid droplets which separate from the main flame
3.20
flame
result of combustion of fuel that produces heat and often light which could be visible with the naked eye
under normal or subdued lighting conditions
3.21
ignite
produce a flame (3.20) with a lighter (3.1) by activating the self-contained ignition and fuel release systems
of that lighter in the intended manner
3.22
dual flame type lighter
lighter (3.1) that employs a burner valve system(s) that produces more than one type of flame (premixing
and postmixing), which could be produced independently and separately (one flame type at a time), or
dependently and concurrently (multiple flame types at a time)
3.23
multiple flame type lighter
lighter (3.1) that employs a burner valve system(s) that produces more than one flame of the same type of
flame (premixing or postmixing), which could be produced independently and separately (one flame at a
time), or dependently and concurrently (multiple flames at a time)
3.24
article
object which during production is given a special shape, surface or design which determines its function to a
greater degree than does its chemical composition

oSIST prEN ISO 9994:2026
ISO/DIS 9994:2025(en)
3.25
substance
chemical element and its compounds in the natural state or obtained by any manufacturing process,
including any additive necessary to preserve its stability and any impurity deriving from the process
used, but excluding any solvent which may be separated without affecting the stability of the substance or
changing its composition
3.26
mixture
solution composed of two or more substances
3.27
aerosol dispenser
non-reusable container made of metal, glass or plastic and containing a gas compressed, liquefied or
dissolved under pressure, with or without a liquid, paste or powder, and fitted with a release device allowing
the contents to be ejected as solid or liquid particles in suspension in a gas, as a foam, paste or powder or in
a liquid state
4  Functional requirements
4.1  Flame generation
In order to minimize the possibility of inadvertent ignition, or self-ignition, lighters shall require a
deliberate manual operation to produce a flame. This operation shall conform to at least one of the following
requirements:
a) positive action on the part of the user shall be required to generate and maintain a flame;
b) two or more independent actions by the user shall be required to generate a flame;
c) an actuating force equal to, or greater than, 15 N shall be required to generate a flame (see Figure 1).

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ISO/DIS 9994:2025(en)
Key
1 lighter
2 mass
F flame-generation actuating force
Figure 1 — Application of flame-generation actuating force as specified in 4.1 c) — Push-button
actuator
4.2  Flame heights
NOTE During the review process prior to the adoption of this version of this document, lighter industry experts
analysed the maximum flame heights of lighters present in the market in a sampling of countries (see Annex B). As a
result of that analysis, the maximum flame heights of certain lighter types were reduced from the prior version of this
document.
In some countries, maximum flame height requirements vary from the requirements defined in this document.
The following parameters should be taken into account when considering further maximum flame height reduction in
future versions of this document:
— Safety,
— Consumers' varying expectations and needs, including those based on their geographical location,
— Industrial constraints of lighter manufacturers in line with widely available, royalty-free state-of-the-art
technology.
4.2.1  Non-adjustable lighters
4.2.1.1  Non-adjustable fluid lighters shall not be capable of producing a flame height greater than 120 mm
when tested in accordance with 6.2.

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4.2.1.2  Non-adjustable, postmixing and premixing burner lighters shall not be capable of producing a
flame height greater than 50 mm when tested in accordance with 6.2.
4.2.2  Adjustable lighters
4.2.2.1  For adjustable lighters as defined in 3.8, the maximum flame height that a user will obtain under
different conditions of use shall comply with the following requirements when tested in accordance with 6.2.
4.2.2.2  Adjustable (refillable or non-refillable) postmixing burner lighters shall have the flame height
adjusted by the manufacturer in such a manner that the lighter, when first ignited by the user — without
changing the adjustment — will not produce a flame height greater than 90 mm.
4.2.2.3  Adjustable refillable postmixing burner lighters shall not be capable of producing a flame height
greater than 107 mm when deliberately adjusted by the user to the manufacturer’s design limit for maximum
flame height.
4.2.2.4  Adjustable non-refillable postmixing burner lighters shall not be capable of producing a flame
height greater than 90 mm when deliberately adjusted by the user to the manufacturer’s design limit for
maximum flame height.
4.2.2.5  Adjustable premixing burner lighters shall have the flame height adjusted by the manufacturer in
such a manner that the lighter, when first ignited by the user — without changing the adjustment — will not
produce a flame height greater than 60 mm.
4.2.2.6  Adjustable premixing burner lighters shall not be capable of producing a flame height greater than
75 mm when deliberately adjusted by the user to the manufacturer’s design limit for maximum flame height.
4.2.2.7  Adjustable postmixing and premixing burner lighters shall not be capable of producing a flame
height greater than 50 mm when set at the lowest possible flame height.
4.2.2.8  Automatically adjusting pipe lighters shall not be capable, in any position, of producing a flame
height greater than 100 mm.
4.2.2.9  The maximum attainable flame height for lighters shall be limited by pre-setting or by product
design, or both.
4.2.3  Dual flame type lighter
For each type of flame of a dual flame type lighter, the flame height shall comply with the corresponding
requirement for that type of flame provided in 4.2.1 or 4.2.2.
4.2.4  Multiple flame type lighter
For multiple flame type lighters, the flame height of each flame shall comply with the corresponding
requirement provided in 4.2.1 or 4.2.2.
4.3  Flame-height adjustment
4.3.1  Adjustable lighters as defined in 3.8 shall require a deliberate action on the part of the user either to
decrease or to increase the flame height when used in the normal manner. Adjustable lighters shall bear an
indication showing the direction of movement of the adjusting mechanism required to produce a higher or
lower flame.
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4.3.2  On lighters whose adjusting mechanisms conform to 4.3.3 and 4.3.4, the direction of movement shall
be permanently imprinted or engraved on the lighter in the vicinity of the adjusting mechanism and readily
visible and understandable.
4.3.3  Gas lighters having rotary-movement flame-control actuators approximately at right-angles to the
flame shall perform as follows:
a) when the flame-control actuator is at the top of the lighter and the lighter is held so that the flame is
oriented vertically upward, and the user is facing the flame-control actuator, moving the actuator to the
left shall produce a decrease in flame height;
b) when the flame-control actuator is at the bottom of the lighter, and the lighter is held so that the user is
facing the actuator, a clockwise movement shall produce a decrease in flame height.
4.3.4  For gas lighters requiring movement of the flame-control actuator approximately parallel to the
flame axis, the flame height shall decrease or increase in accordance with the direction of the movement.
4.3.5  If the flame-control actuator protrudes from the body of the lighter, it shall require a minimum
actuating force of 1 N applied over the entire range of adjustment in a tangential direction (see Figure 2).
4.4  Resistance to spitting or sputtering and flaring
Gas lighters as defined in 3.3, when set at the maximum flame height, shall exhibit no spitting or sputtering
as defined in 3.19, or flaring as defined in 3.17, when tested in accordance with 6.3.
Key
1 direction of flame-control actuating force
Figure 2 — Application of flame-control actuating force as specified in 4.3.5
4.5  Flame extinction
When a lighter is extinguished in the intended manner, for example by closing a cover or by releasing a
button or a lever, it shall meet the following requirements with respect to extinction time.
a) Non-adjustable fluid and postmixing burner lighters, at their permanently set flame heights, when
tested in accordance with 6.4, shall have any exposed flame completely extinguished within 2 s after a
10 s burn.
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b) Adjustable postmixing burner lighters, when tested in accordance with 6.4, shall have any flame
completely extinguished within 2 s:
1) after a 10 s burn when set at a flame height of 50 mm, or the maximum flame height the adjustment
allows if lower than 50 mm;
2) after a 5 s burn when set at maximum flame height.
c) In the case of postmixing burner lighters that have shields, an additional 2 s afterburn (i.e. continuous
burning) is acceptable if the flame, during this additional 2 s period, does not extend above the shield.
d) Non-adjustable premixing burner lighters, at their permanently set flame heights, when tested in
accordance with 6.4, shall have any flame completely extinguished in no more than 5 s after a 10 s burn.
e) Adjustable premixing burner lighters, when tested in accordance with 6.4, shall have any flame
completely extinguished in no more than 5 s:
1) after a 10 s burn when set at a flame height of 50 mm, or the maximum flame height the adjustment
allows if lower than 50 mm;
2) after a 5 s burn when set at maximum flame height.
NOTE In the case of premixing burner gas lighters, the total afterburn time in this document is intended to
be reconsidered periodically with a view to gradual reduction in line with technological progress.
f) In the case of dual flame type lighters, the extinction time of each type of flame shall comply with the
corresponding requirement for that type of flame provided in this subclause.
g) In the case of multiple flame type lighters, the extinction time of each flame shall comply with the
corresponding requirement for that type of flame provided in this subclause.
4.6  Volumetric displacement of fuel
For gas lighters shipped with fuel, the liquid portion of the fuel shall not exceed 85 % of the volumetric
capacity of the fuel reservoir when tested in accordance with 6.7.
4.7  Mass of fuel
For gas lighters shipped with fuel, the mass of liquefied fuel shall not exceed 10 g, when tested in accordance
with 6.7.4.2.
5  Structural integrity requirements
5.1  External finish
Lighters shall have no external sharp edges that could cause accidental cuts or abrasions to the user when
handled or used in the intended manner. If a potential sharp edge is found it shall be tested according to
UL 1439.
NOTE UL refers to Underwriters Laboratories.
5.2  Compatibility with fuel
5.2.1  Components of fluid lighters as defined in 3.2 that come into contact with the fuel recommended by
the manufacturer shall not, after extended contact with that fuel, deteriorate so as to cause the lighter to fail
any of the criteria contained in this document, when tested in accordance with 6.5.
5.2.2  Components of gas lighters as defined in 3.3 that come into contact with the fuel recommended by
the manufacturer shall not deteriorate after exposure to the fuel, so as to cause the lighter to fail any of the

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criteria contained in this document or allow gas escape exceeding 15 mg/min, when tested in accordance
with 6.5.
5.2.3  Lighters that meet the requirements of 5.2.1 and 5.2.2 and that are able to be ignited in the intended
manner shall subsequently meet all the applicable requirements of 4.1 to 4.5, inclusive. Lighters that are not
able to be ignited in the intended manner do not constitute a failure.
5.3  Resistance to fuel loss
5.3.1  Refillable fluid lighters having a sealed fuel reservoir shall have
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