SIST EN 14458:2018
(Main)Personal eye-equipment - High performance visors intended only for use with protective helmets
Personal eye-equipment - High performance visors intended only for use with protective helmets
This European Standard specifies the minimum requirements for visors designed specifically to be used only with protective helmets, including but not limited to those conforming to EN 443, EN 14052, EN 16471 and EN 16473 as the situation dictates. These visors may be permanently fitted to, or removable from, the helmet. See the scope of the various helmet standards for applications.
These visors are not intended to protect against smoke and gas /vapour hazards.
Three types of visors in two forms are described in this document.
The two forms are:
- face guards provide both eye and face protection, and
- eye guards that are shorter and effectively provide only eye protection.
The three types are:
- Visors for general use: Eye guards and face guards providing resistance and/or protection against mechanical, liquid chemical and basic physical hazards.
- Visors with increased thermal performance: Face guards that additionally provide resistance and/or protection against higher than basic levels of heat and flame. This additional requirement is not applicable for eye guards.
- Mesh visors: Eye guards and face guards that incorporate mesh oculars with defined levels of performance from EN 1731, and other additional mechanical requirements described in this standard.
Visors for sporting use, those with corrective effect, and goggles used with a protective helmet are not covered by this standard.
Persönlicher Augenschutz - Hochleistungsvisiere zur ausschließlichen Verwendung an Schutzhelmen
Diese Europäische Norm bestimmt die Mindestanforderungen für Visiere, die speziell zur Verwendung mit Schutzhelmen ausgelegt sind, einschließlich jener in Übereinstimmung mit EN 443, EN 14052, EN 16471 und EN 16473, ist aber, je nach Situation, nicht auf diese beschränkt. Diese Visiere können permanent montiert oder vom Helm entfernbar sein. Siehe Anwendungsbereich der verschiedenen Helmnormen für die Anwendungen.
Diese Visiere sind nicht zum Schutz gegen Rauch und Gas/Dampf Gefährdungen ausgelegt.
In diesem Dokument werden drei Typen von Visieren in zwei verschiedenen Formen beschrieben.
Diese zwei Formen sind:
- der Gesichtsschutz, der sowohl Augen, als auch Gesicht schützt und
- der Augenschutz, der kürzer ist und lediglich die Augen schützt.
Bei den drei Typen handelt es sich um:
- Visiere für die allgemeine Verwendung: Augen- und Gesichtsschutz, der als Abwehr und/oder Schutz gegenüber mechanischen, flüssig-chemischen und einfachen physikalischen Gefährdungen dient.
- Visiere mit erhöhter thermischer Leistungsfähigkeit: Gesichtsschutz, der zusätzlich als Abwehr und/ oder Schutz gegen ausgeprägtere Wärme- und Flammniveaus dient. Diese zusätzliche Anforderung ist auf einen Augenschutz nicht anwendbar.
- Maschengeflechtvisiere: Augen- und Gesichtsschutz, der eine Gewebe-Sichtscheibe mit definierten Leistungsniveaus nach EN 1731 mit anderen, zusätzlichen mechanischen Anforderungen, die in dieser Norm beschrieben sind, verbindet.
Visiere für den sportlichen Einsatz, Visiere mit Korrektionswirkung und Korbbrillen, die zusammen mit Schutzhelmen eingesetzt werden, werden von dieser Norm nicht abgedeckt.
Équipement de protection des yeux - Visières haute performance uniquement destinées à une utilisation avec des casques de protection
La présente Norme européenne spécifie les exigences minimales s'appliquant aux visières spécifiquement conçues pour une utilisation exclusive avec des casques de protection, y compris, mais sans s'y limiter, les casques conformes à l'EN 443, l'EN 14052, l'EN 16471 et l'EN 16473 selon le cas. Il peut s'agir de visières fixées de manière permanente au casque, ou de visières amovibles. Voir le domaine d'application des différentes normes de casque selon les utilisations prévues.
Les visières couvertes par le présent document ne sont pas destinées à assurer une protection contre la fumée et les dangers liés aux gaz/vapeurs.
Le présent document décrit trois types et deux formes de visière.
Les deux formes sont les suivantes :
- les écrans faciaux qui protègent à la fois les yeux et le visage ; et
- les écrans oculaires qui sont plus courts et qui ne protègent efficacement que la région oculaire.
Les trois types de visière sont les suivants :
- les visières à usage général : écrans oculaires et écrans faciaux assurant une résistance et/ou une protection contre les risques mécaniques, les risques physiques de base ainsi que les risques liés aux substances chimiques liquides ;
- les visières à résistance thermique accrue : écrans faciaux assurant une résistance et/ou une protection contre des risques plus élevés liés à la chaleur et aux flammes. Cette exigence supplémentaire ne s'applique pas aux écrans oculaires ;
- visières grillagées : écrans oculaires et écrans faciaux dotés d'oculaires grillagés présentant des niveaux de performance spécifiques conformément à l'EN 1731, et des exigences mécaniques supplémentaires définies dans la présente norme.
Les visières destinées à la pratique sportive, les visières avec effet correcteur ainsi que les lunettes masque utilisées avec un casque de protection ne sont pas couvertes par la présente norme.
Osebna oprema za varovanje oči - Vizirji z visoko stopnjo zaščite, namenjeni le uporabi z zaščitnimi čeladami
Ta evropski standard določa minimalne zahteve za vizirje, namenjene le uporabi z varovalnimi čeladami, vključno s tistimi, ki so v skladu s standardi EN 443, EN 14052, EN 16471 in EN 16473, vendar ne omejeno nanje, glede na situacijo. Ti vizirji so lahko trajno pritrjeni na čelado ali odstranljivi. Za uporabo glejte različne standarde za čelade.
Ti vizirji niso namenjeni zagotavljanju zaščite pred dimom in plini/hlapi. V tem dokumentu so opisani trije tipi vizirjev v dveh oblikah. Omenjeni dve obliki:
– ščitnik za obraz, ki zagotavlja zaščito za oči in obraz, in
– ščitnik za oči, ki je krajši in zagotavlja samo zaščito za oči.
Omenjeni trije tipi:
– vizirji za splošno uporabo: ščitniki za oči in obraz zagotavljajo odpornost in/ali zaščito pred mehanskimi in fizičnimi nevarnostmi ter tekočimi kemikalijami.
– vizirji z boljšo toplotno zmogljivostjo: ščitniki za obraz, ki dodatno zagotavljajo boljšo odpornost in/ali zaščito kot zgolj zaščito proti osnovnim ravnem toplote in plamenov. Ta dodatna zahteva se ne uporablja za ščitnike za oči.
– mrežni vizirji: ščitniki za oči in obraz z mrežnimi okularji z določenimi ravnmi zmogljivosti v skladu s standardom EN 1731 in drugimi mehanskimi zahtevami, opisanimi v tem standardu.
Vizirji za športno uporabo, vizirji s korektivnim učinkom in očala, ki se uporabljajo z varovalnimi čeladami, niso zajeti v tem standardu.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 14458:2018
01-oktober-2018
1DGRPHãþD
SIST EN 14458:2004
2VHEQDRSUHPD]DYDURYDQMHRþL9L]LUML]YLVRNRVWRSQMR]DãþLWHQDPHQMHQLOH
XSRUDEL]]DãþLWQLPLþHODGDPL
Personal eye-equipment - High performance visors intended only for use with protective
helmets
Persönlicher Augenschutz - Hochleistungsvisiere zur ausschließlichen Verwendung an
Schutzhelmen
Équipement de protection des yeux - Visières haute performance uniquement destinées
à une utilisation avec des casques de protection
Ta slovenski standard je istoveten z: EN 14458:2018
ICS:
13.220.10 Gašenje požara Fire-fighting
13.340.20 Varovalna oprema za glavo Head protective equipment
SIST EN 14458:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 14458:2018
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SIST EN 14458:2018
EN 14458
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2018
EUROPÄISCHE NORM
ICS 13.340.20 Supersedes EN 14458:2004
English Version
Personal eye-equipment - High performance visors
intended only for use with protective helmets
Équipement de protection des yeux - Visières haute Persönlicher Augenschutz - Hochleistungsvisiere zur
performance uniquement destinées à une utilisation ausschließlichen Verwendung an Schutzhelmen
avec des casques de protection
This European Standard was approved by CEN on 27 November 2017.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14458:2018 E
worldwide for CEN national Members.
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SIST EN 14458:2018
EN 14458:2018 (E)
Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Classification . 7
4.1 General . 7
4.2 Visor for general use . 7
4.3 Face guards with increased thermal performance . 7
4.4 Mesh visor . 7
5 Performance requirements . 9
5.1 General . 9
5.2 Visors for general use . 9
5.2.1 Construction . 9
5.2.2 Materials . 9
5.2.3 Resistance to UV radiation . 9
5.2.4 Cleaning and disinfection . 10
5.2.5 Resistance to thermal shock . 10
5.2.6 Resistance to corrosion . 10
5.2.7 Vision . 10
5.2.8 Area to be protected . 11
5.2.9 Electrical properties . 11
5.2.10 Protection against high speed particles . 11
5.2.11 Flammability . 12
5.2.12 Resistance to contact with liquid chemicals . 12
5.2.13 Visors attached to helmets with radiant heat performance . 13
5.2.14 Ergonomics and practical performance . 13
5.3 Face guards with increased thermal performance . 15
5.3.1 General . 15
5.3.2 Radiant heat . 15
5.3.3 Flammability . 15
5.3.4 Resistance to molten metals and hot solids . 16
5.4 Mesh visors . 16
5.5 Optional requirements . 16
5.5.1 General . 16
5.5.2 Optical filtering performance . 16
5.5.3 Protection against high speed particles with high energy impact . 17
5.5.4 Resistance to fogging . 17
5.5.5 Abrasion resistance . 17
6 Test methods . 17
6.1 Nominal values and tolerances . 17
6.2 Conditioning and test sample numbers . 18
6.2.1 General . 18
6.2.2 Ultraviolet (UV) ageing. 18
2
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SIST EN 14458:2018
EN 14458:2018 (E)
6.2.3 Thermal shock conditioning . 18
6.2.4 Thermal plus conditioning . 18
6.2.5 Thermal minus conditioning . 18
6.3 Visual inspection . 19
6.4 Electrical properties tests . 19
6.4.1 Conductive headform test. 19
6.4.2 Surface insulation test . 19
6.5 Radiant heat protection . 19
6.6 Flammability test for visors for general use . 20
6.7 Flammability test for face guards with increased thermal performance . 20
6.8 Test for resistance to liquid chemicals . 21
6.9 Practical performance test . 21
6.9.1 Test conditions . 21
6.9.2 Test subjects . 21
6.9.3 Equipment to be tested . 21
6.9.4 Preparation for the test . 21
6.9.5 Test procedure . 22
7 Marking . 23
7.1 General . 23
7.2 Markings on visor . 24
7.3 Markings on means of fixing . 24
8 Information . 25
Annex A (normative) Tables of conditioning/ testing schedule . 27
Annex B (normative) Taber abrasion resistance test method . 31
B.1 Apparatus . 31
B.2 Preparation of test pieces . 33
B.3 Test method . 33
B.4 Calculation and interpretation of results . 34
Annex C (informative) Test report and uncertainty of measurement . 35
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2016/425 aimed to be covered . 37
Bibliography . 39
3
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SIST EN 14458:2018
EN 14458:2018 (E)
European foreword
This document (EN 14458:2018) has been prepared by Technical Committee CEN/TC 85 “Eye
protective equipment”, 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 February 2019, and conflicting national standards
shall be withdrawn at the latest by February 2019.
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 14458:2004.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Regulation.
For relationship with EU Regulation, see informative Annex ZA, which is an integral part of this
document.
The main changes regarding EN 14458:2004 are:
— change of title;
— correction of discrepancies between this European Standard and the designated helmet standards,
e.g. EN 443, EN 14052; EN 16473;
— modifications regarding terms and definitions;
— clarification and extension of the scope; not only useable for firefighter helmets;
— clarifications regarding the three different types of visors covered by this standard and the
corresponding tests and requirements;
— clarification regarding the two forms of visors considered in this standard, e.g. only face guards for
increased thermal performance;
— introduction of two radiant heat exposure levels and the corresponding tests for increased thermal
performance visors;
— revision and extension of the practical performance test;
— new normative Annex A which summarizes the conditioning, number of test samples and the
sequence of tests to be done.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
4
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SIST EN 14458:2018
EN 14458:2018 (E)
1 Scope
This European Standard specifies the minimum requirements for visors designed specifically to be used
only with protective helmets e.g. firefighter helmets conforming to EN 443, EN 16471 and EN 16473
and high performance industrial helmets conforming to EN 14052. These visors may be permanently
fitted to, or be removable from the helmet.
Three types of visors in two forms are described in this document.
The two forms are:
— face guards provide both eye and face protection, and
— eye guards that are shorter and effectively provide only eye protection.
The three types are:
— visors for general use: eye guards and face guards providing resistance and/or protection against
mechanical, liquid chemical and basic physical hazards;
— visors with increased thermal performance: face guards that additionally provide resistance and/or
protection against higher than basic levels of heat and flame;
— mesh visors: eye guards and face guards that incorporate mesh lenses with defined levels of
performance from EN 1731, and other additional mechanical requirements described in this
European Standard.
These visors are not intended to protect against smoke and gas /vapour hazards.
Visors for sporting use, those with corrective effect, and goggles used with a protective helmet are not
covered by this European Standard.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 136:1998, Respiratory protective devices — Full face masks — Requirements, testing, marking
EN 166:2001, Personal eye-protection — Specifications
EN 167:2001, Personal eye-protection — Optical test methods
EN 168:2001, Personal eye-protection — Non-optical test methods
EN 170:2002, Personal eye-protection — Ultraviolet filters — Transmittance requirements and
recommended use
EN 171:2002, Personal eye-protection — Infrared filters — Transmittance requirements and
recommended use
EN 172:1994, Personal eye protection — Sunglare filters for industrial use
EN 407:2004, Protective gloves against thermal risks (heat and/or fire)
EN 443:2008, Helmets for fire fighting in buildings and other structures
5
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SIST EN 14458:2018
EN 14458:2018 (E)
EN 659:2003+A1:2008, Protective gloves for firefighters
EN 1731:2006, Personal eye protection — Mesh eye and face protectors
EN 12477:2001, Protective gloves for welders
EN 13087-1:2000, Protective helmets — Test methods — Part 1: Conditions and conditioning
EN 13087-7:2000, Protective helmets — Test methods — Part 7: Flame resistance
EN 13087-8:2000, Protective helmets — Test methods — Part 8: Electrical properties
EN 13087-10:2012, Protective helmets — Test methods — Part 10: Resistance to radiant heat
EN 16128:2015, Ophthalmic optics — Reference method for the testing of spectacle frames and sunglasses
for nickel release
EN ISO 4007:2012, Personal protective equipment — Eye and face protection — Vocabulary
(ISO 4007:2012)
EN ISO 9185:2007, Protective clothing — Assessment of resistance of materials to molten metal splash
(ISO 9185:2007)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 4007 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
visor
device providing protection to all or part of the face including at least the eyes
3.2
eye guard
visor which provides protection to essentially only the eyes, when in the in-use position
Note 1 to entry: See 5.2.8.2.
3.3
face guard
visor which provides protection to the eyes and a substantial area of the face, when in the in-use
position
Note 1 to entry: See 5.2.8.1.
6
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SIST EN 14458:2018
EN 14458:2018 (E)
3.4
means of fixing
means by which the visor is supported and interfaced with the designated helmet(s)
Note 1 to entry: This means may be an integral part of the helmet, may be fixed permanently or temporarily to
it, or may be worn separately but at the same time as the helmet.
3.5
helmet
headwear intended to primarily protect the upper part of the wearer’s head against hazards
4 Classification
4.1 General
Visors in accordance with this document shall be classified as one of the following three types (see 4.2
to 4.4). Specific warning shall be included in the information provided by the manufacturer on the
limitations of use of each type (see Clause 8 f)), and the need to ensure that suitable helmet-visor
combinations are used (see Clause 8 m). Table 1 outlines the clauses of this document applicable to the
three types of visors.
4.2 Visor for general use
Eye guards and face guards providing resistance and/or protection against mechanical, liquid chemical
and basic physical hazards. Intended for use where there is no foreseeable exposure to significant levels
of heat, flame or molten metals.
NOTE For example but not limited to technical rescue, industrial applications, emergency medical activities.
4.3 Face guards with increased thermal performance
Face guards that additionally provide resistance and/or protection against higher than basic levels of
heat and flame. Intended for use where exposure to significant levels of heat and/or flame and molten
metal is foreseeable.
NOTE 1 Eye guards are not suitable for applications where increased thermal performance is needed.
NOTE 2 For example but not limited to firefighting, foundry or furnace work with exposure to the heat source,
hot cutting.
4.4 Mesh visor
Eye guards and face guards that incorporate mesh lenses with defined levels of performance from
EN 1731. Intended for use to protect against mechanical hazards and where is no foreseeable need for
protection against heat and/or flame, sparks, chemicals or liquid / molten materials, or electrical
contact.
NOTE For example but not limited to chainsaw use during tree clearance and related activities. There will be
only a few other situations where mesh visors can be considered suitable.
7
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SIST EN 14458:2018
EN 14458:2018 (E)
Table 1 — Allocation of requirements for the three types of visors covered by this standard
Requirement Eye guards and face Face guards with Mesh
guards for general increased thermal
use performance
5.1 General M M M
5.2.1 Construction M M M
5.2.2 Materials M M M
5.2.3 Resistance to UV radiation M M -
5.2.4 Cleaning and disinfection M M M
5.2.5 Resistance to thermal shock m/o m/o m/o
5.2.6 Resistance to corrosion M M M
5.2.7.1 Optical properties M M -
5.2.7.2 Field of view M M M
5.2.8 Area to be protected M M M
5.2.9 Electrical properties m/o m/o -
5.2.10 Protection against high M M -
speed particles
5.2.11.1 Flammability M M M
5.2.11.2 Verification of the m/o m/o m/o
helmet flammability
performance
5.2.12 Resistance to contact by m/o m/o -
liquid chemicals
5.2.13 Visors attached to helmets m/o m/o -
with radiant heat performance
5.2.14 Ergonomics and practical M M M
performance
5.3.2.1 Radiant heat protection - M -
5.3.2.2 Radiant heat resistance - M -
5.3.3 Flammability - M -
5.3.4 Resistance to molten metals - M -
and hot solids
5.4 Mesh visors - - M
5.5.1 General O O O
5.5.2 Optical filtering O O -
performance
5.5.3 Resistance to high energy O O O
impact
8
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SIST EN 14458:2018
EN 14458:2018 (E)
Requirement Eye guards and face Face guards with Mesh
guards for general increased thermal
use performance
5.5.4 Resistance to fogging O O -
5.5.5 Abrasion resistance O O -
Clause 7 Marking M M M
Clause 8 Information M M M
M = mandatory requirement for this type of visor
O = optional requirement for this type of visor
m/o = mandatory for the visor if any designated helmet meets this requirement, otherwise optional for the visor
- = not applicable for this type of visor
5 Performance requirements
5.1 General
Visors conforming to this document shall not add any risks to the user under foreseeable conditions of
use. Therefore visors conforming to this European Standard shall meet:
— the general requirements given in 5.2;
— for face guards with increased thermal performance in addition the requirements of 5.3;
— for mesh visors the requirements of 5.4; and
optional requirements are given in 5.5.
Visors, when fitted to helmets designated by the visor manufacturer, in both the in-use (protective)
position, and the out-of-use (standby) position, shall not detrimentally affect the performance of the
helmets with which they are used. This requirement shall be assessed within the relevant helmet
standard, applied to the combination.
5.2 Visors for general use
5.2.1 Construction
The visor shall be free from projections, sharp edges or other defects, which are likely to cause
discomfort or injury during use. Test in accordance with 6.3.
5.2.2 Materials
No parts of the visor assembly, which may be in contact with the wearer shall be made of materials
which, under foreseeable conditions of use, are known to be likely to cause skin irritation or any
adverse effect on health. Test in accordance with 6.3.
In the case of metallic materials in direct and prolonged contact with the skin, the release of nickel shall
2
be less than 0,5 μg/cm /week when tested according to EN 16128:2015.
5.2.3 Resistance to UV radiation
Visors shall meet the requirements of EN 166:2001, 7.1.5.2 when preconditionned according to
EN 168:2001, Clause 6 and assessed according to EN 167:2001, Clauses 4 and 6. Three test samples
shall be tested, two in one of the eye positions and one in the other.
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SIST EN 14458:2018
EN 14458:2018 (E)
5.2.4 Cleaning and disinfection
Substances and procedures recommended by the manufacturer for cleaning, maintenance or
disinfection shall have no adverse effect on the exposed components of the helmet or visor, nor leave
residues, which may enhance flammability. Neither shall they be known to be likely to have any adverse
effect on the wearer when applied in accordance with the manufacturer’s instructions. After cleaning
and disinfection in accordance with the manufacturer’s instructions, the visor shall show no visible
degradation and shall continue to meet the requirements of either 5.2.11 for general use visors or 5.3.3
for increased thermal performance visors.
Where anti-fogging compounds are specified by the manufacturer they shall be compatible with the
eyes, the skin, and the visor assembly under the foreseeable conditions of use. Test in accordance with
6.3.
5.2.5 Resistance to thermal shock
The visor and means of fixing shall show no apparent deformation when subjected to thermal shock
conditioning according to 6.2.3. At the end of each of the periods 6.2.3 a) to e) the raising/ lowering
mechanism for the visor shall operate correctly in accordance with the manufacturer’s instructions.
Optionally, period 6.2.3 a) of the sequence may be conducted at –20 °C, −30 °C or −40 °C (all ± 2 °C).
Where one of these lower temperatures is used, conditioning at −10 °C is not required. The test report
and marking shall identify the temperature used.
Visors shall match or exceed the extremes of temperature against which designated helmets have been
tested for thermal shock.
5.2.6 Resistance to corrosion
After having undergone the test for resistance to corrosion specified in EN 168:2001, Clause 8, all metal
parts of the visor and means of fixing shall display smooth surfaces and shall be free from corrosion.
5.2.7 Vision
5.2.7.1 Optical properties
The optical properties of the lens shall meet the minimum requirements specified in Table 2.
Table 2 — General optical properties
Property Minimum requirement Test in accordance with
Refractive power EN 166:2001, 7.1.2.1, Optical Class 2 EN 167:2001, Clause 3
Transmittance EN 166:2001, 7.1.2.2 Depends on visor characteristics.
See EN 166:2001, 7.1.
...
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