SIST EN 14458:2004
(Main)Personal eye-equipment - Faceshields and visors for use with firefighters' and high performance industrial safety helmets used by firefighters, ambulance and emergency services
Personal eye-equipment - Faceshields and visors for use with firefighters' and high performance industrial safety helmets used by firefighters, ambulance and emergency services
This document applies to visors designed specifically to be fitted to and/or used with helmets conforming to EN 443 when used by firefighters, or helmets which conform to EN 443 or prEN 14052 when used by ambulance and emergency services, as the situation dictates. They are intended to provide protection against the various hazards expected to be encountered in firefighting, ambulance and emergency service duties, except respiratory, smoke, and gas /vapour hazards.
Three types of visor are described in this document. One provides protection against general hazards; the second additionally provides protection against heat and flame. The third type of visor incorporates mesh oculars, and is intended for use in very limited circumstances. This document also describes two forms for all three types of visors; face guards that provide both eye and face protection; eye guards that are shorter and effectively provide only eye protection.
The requirements of this document do not apply to visors intended for use without a helmet. Such requirements are given in EN 166.
Visors with corrective effect are excluded from the scope of this document.
Persönlicher Augenschutz - Gesichtsschutzschilde und Visiere zur Verwendung mit Schutzhelmen für die Feuerwehr, Krankenwagenpersonal und Notfalldienste
Dieses Dokument gilt für Visiere, die besonders dafür konstruiert sind, an EN 443 entsprechenden Schutzhelmen für die Feuerwehr oder EN 443 bzw. prEN 14052 entsprechenden Schutzhelmen für Krankenwagenpersonal und Notfalldienste befestigt und/oder je nach den Erfordernissen der jeweiligen Situation mit diesen verwendet zu werden. Sie sind dazu vorgesehen, Schutz gegen die unterschiedlichen Gefährdungen zu bieten, die beim Feuerwehrdienst und beim Einsatz von Krankenwagen- und Notfalldienstpersonal anzutreffen sind, mit Ausnahme von Gefährdungen der Atmungsorgane und Gefährdungen durch Rauch und Gase bzw. Dämpfe.
In diesem Dokument werden drei Typen von Visieren beschrieben. Der eine bietet Schutz gegen allgemeine Gefährdungen; der zweite bietet zusätzlich Schutz gegen Hitze und Flammen. Der dritte Typ von Visieren enthält Sichtscheiben aus Maschengeflecht und ist für die Verwendung unter sehr begrenzten Bedingungen vorgesehen. Dieses Dokument beschreibt außerdem zwei Formen für alle drei Visiertypen: den Gesichtsschutz, der sowohl die Augen als auch das Gesicht schützt, und die Augenschützer, die kürzer sind und nur die Augen wirksam schützen.
Die Anforderungen dieses Dokuments gelten nicht für Visiere, die zur Verwendung ohne einen Helm vorgesehen sind. Solche Anforderungen sind in EN 166 angegeben.
Visiere mit Korrektionswirkung fallen nicht in den Anwendungsbereich dieses Dokuments.
Equipement de protection des yeux - Ecran facial et visiere des casques de sapeurs-pompiers et de protection a haute performance pour l'industrie, utilisés par les sapeurs-pompiers, les services d'ambulance et d'urgence
Le présent document concerne les visieres spécifiquement conçues pour etre fixées sur ou etre utilisées avec des casques conformes a l'EN 443 pour les sapeurs-pompiers ou des casques conformes a l'EN 443 ou au prEN 14052 pour les services d'ambulance et d'urgence, selon le cas. Elles sont destinées a assurer une protection contre les divers risques susceptibles de survenir au cours des interventions de lutte contre l'incendie, des services d'ambulance et d'urgence, a l'exception des risques d'ordre respiratoire et émission de fumée et de gaz/vapeur.
Le présent document décrit trois types de visiere. Le premier type assure une protection contre les dangers d'ordre général ; le second type assure, en outre, une protection contre la chaleur et les flammes et le troisieme comprend des oculaires grillagés et est destiné a etre utilisé dans des circonstances tres limitées. Le présent document décrit également deux formes pour ces trois types de visieres : les écrans faciaux qui protegent a la fois l'?il et la face; les écrans oculaires qui sont plus courts et ne protegent efficacement que l'?il.
Les exigences du présent document ne concernent pas les visieres destinées a etre utilisées sans casque. Ces exigences sont indiquées dans l'EN 166.
Les visieres avec effet correcteur sont exclues du domaine d'application du présent document.
Osebna oprema za varovanje oči - Ščitniki za obraz in vizirji za gasilce ter industrijske čelade z visoko stopnjo zaščite, katere uporabljajo gasilci, reševalci in osebje prve pomoči
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Persönlicher Augenschutz - Gesichtsschutzschilde und Visiere zur Verwendung mit Schutzhelmen für die Feuerwehr, Krankenwagenpersonal und NotfalldiensteEquipement de protection des yeux - Ecran facial et visiere des casques de sapeurs-pompiers et de protection a haute performance pour l'industrie, utilisés par les sapeurs-pompiers, les services d'ambulance et d'urgencePersonal eye-equipment - Faceshields and visors for use with firefighters' and high performance industrial safety helmets used by firefighters, ambulance and emergency services13.340.20Varovalna oprema za glavoHead protective equipment13.220.10Gašenje požaraFire-fightingICS:Ta slovenski standard je istoveten z:EN 14458:2004SIST EN 14458:2004en01-oktober-2004SIST EN 14458:2004SLOVENSKI
STANDARD
SIST EN 14458:2004
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14458August 2004ICS 13.340.20 English versionPersonal eye-equipment - Faceshields and visors for use withfirefighters' and high performance industrial safety helmets usedby firefighters, ambulance and emergency servicesEquipement de protection des yeux - Ecran facial et visièreutilisés avec des casques pour les sapeurs-pompiers et lesservices d'ambulance et d'urgencePersönlicher Augenschutz - Gesichtsschutzschilde undVisiere zur Verwendung mit Schutzhelmen für dieFeuerwehr, Krankenwagenpersonal und NotfalldiensteThis European Standard was approved by CEN on 27 May 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14458:2004: ESIST EN 14458:2004
EN 14458:2004 (E) 2 Contents page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.5 4 Classification.5 4.1 General use.5 4.2 Firefighters’ use.5 4.3 Mesh.5 5 Performance requirements.6 5.1 General.6 5.2 Requirements for general use.6 5.3 Additional requirements for firefighters’ use.10 5.4 General requirements for mesh visors.11 5.5 Optional requirements.11 6 Testing.12 6.1 Nominal values and tolerances.12 6.2 Conditioning and sample numbers.12 6.3 Visual inspection.13 6.4 Practical performance test.13 6.5 Electrical properties tests.15 6.6 Radiant heat resistance test.16 6.7 Radiant heat protection test.16 6.8 Flammability test for firefighters’ visors.19 6.9 Resistance to extremes of temperature test for firefighters’ visors.19 6.10 Test for resistance to chemicals.19 7 Marking.19 7.1 General.19 7.2 Markings on visor.20 7.3 Markings on means of fixing.20 8 Information.21 Annex A (normative) Taber abrasion resistance test method.23 A.1 Apparatus.23 A.2 Preparation of test pieces.25 A.3 Test method.25 A.4 Calculation and interpretation of results.25 Annex B (informative)
Equipment list.27 B.1 General.27 B.2 Equipment list – firefighters.27 B.3 Equipment list – Emergency teams / ambulance service.27 Annex C (informative)
Uncertainty of measurement.28 C.1 Test report and uncertainty of measurement.28 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 89/686/EEC.30
SIST EN 14458:2004
EN 14458:2004 (E) 3 Foreword This document (EN 14458:2004) has been prepared by Technical Committee CEN/TC 85 “Personal eye-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 2005, and conflicting national standards shall be withdrawn at the latest by February 2005. 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 Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard : Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 14458:2004
EN 14458:2004 (E) 4 1 Scope This document applies to visors designed specifically to be fitted to and/or used with helmets conforming to EN 443 when used by firefighters, or helmets which conform to EN 443 or prEN 14052 when used by ambulance and emergency services, as the situation dictates. They are intended to provide protection against the various hazards expected to be encountered in firefighting, ambulance and emergency service duties, except respiratory, smoke, and gas /vapour hazards. Three types of visor are described in this document. One provides protection against general hazards; the second additionally provides protection against heat and flame. The third type of visor incorporates mesh oculars, and is intended for use in very limited circumstances. This document also describes two forms for all three types of visors; face guards that provide both eye and face protection; eye guards that are shorter and effectively provide only eye protection. The requirements of this document do not apply to visors intended for use without a helmet. Such requirements are given in EN 166. Visors with corrective effect are excluded from the scope of this document. 2 Normative references The following referenced documents are indispensable for the application 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.
EN 165:1995, Personal eye protection – Vocabulary 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 443:1997, Helmets for firefighters EN 659, Protective gloves for firefighters EN 960, Headforms for use in the testing of protective helmets EN 1731:1997, Mesh type eye and face protectors for industrial and non-industrial use against mechanical hazards and/or heat EN ISO 6942, Protective clothing - Protection against heat and fire - Method of test: Evaluation of materials and material assemblies when exposed to a source of radiant heat (ISO 6942:2002) EN 13087-10, Protective helmets – Test methods – Part 10: Resistance to radiant heat prEN 14052, High performance industrial helmets SIST EN 14458:2004
EN 14458:2004 (E) 5 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 165:1995 and the following apply. 3.1 means of fixing means by which the ocular of the visor is supported and interfaced with the designated helmet(s). 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 3.2 face guard visor which provides protection to the eyes and a substantial area of the face, when in the in-use position (see 5.2.12.1) 3.3 eye guard visor which provides protection to essentially only the eyes, when in the in-use position (see 5.2.12.2) 4 Classification Visors according to this document shall be classified as one of three types. Specific warning shall be included in the information provided by the manufacturer on the limitations on use of each type (see 8 f)), and the need to ensure that suitable helmet visor combinations are used (see 8 m)). 4.1 General use Intended for use where there is no foreseeable exposure to significant levels of heat and / or flame. Such visors shall only be designated for use with high performance industrial safety helmets (see prEN 14052), or firefighters’ helmets (see EN 443). NOTE Helmets conforming to either prEN 14052 or EN 443 are considered potentially suitable for ambulance and emergency teams, where protection is required against the hazardous conditions to which such personnel may be exposed. Such activities may include making safe search, rescue and medical intervention at disaster sites where there is no expectation of exposure to heat and flame. Where there is also expectation of exposure to significant levels of heat and flame, or for structural fire fighting, only helmets conforming to EN 443 are considered appropriate. 4.2 Firefighters’ use Intended for use where exposure to significant levels of heat and/or flame is foreseeable. Such visors shall only be designated for use with firefighters’ helmets (see EN 443). 4.3 Mesh Intended for use by emergency services where there is no foreseeable need for protection against heat and/or flame, sparks, chemicals or liquid / molten materials, or electrical contact. Such visors shall only be designated for use with high performance industrial safety helmets (prEN 14052), or firefighters’ helmets (see EN 443). NOTE Mesh visors are included here specifically to cater for chainsaw use by emergency service teams during tree clearance and related activities. There will be few other situations where mesh visors can be considered suitable. SIST EN 14458:2004
EN 14458:2004 (E) 6 5 Performance requirements 5.1 General Visors conforming to this document shall not be likely to increase the risks to the user under foreseeable conditions of use. Non-mesh visors conforming to this document shall meet the general requirements given in 5.2. Visors intended for use where there is a foreseeable risk of exposure to significant levels of heat and flame shall in addition meet the requirements of 5.3. Mesh visors shall meet the requirements of 5.4. Optional requirements are given in 5.5. Helmets used in conjunction with these visors shall continue to meet the relevant requirements of their appropriate document, with the visor in both the in-use (protective) position, and the out-of-use (standby) position. 5.2 Requirements 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. 5.2.3 Resistance to ageing Oculars shall meet the requirements of EN 166:2001, 7.1.5.2 when tested according to Clause 6 of EN 168:2001. 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. Test in accordance with 6.3. After cleaning and disinfection, the visor shall continue to meet the requirements of either 5.2.15 or 5.3.3. 5.2.5 Compatibility with other equipment The visor shall integrate satisfactorily with: a) the helmet with which it is designed to be used; b) any respiratory protective devices designated for use with the helmet/visor assembly by the eye protector manufacturer; c) any corrective eyewear designated for use with the helmet/visor by the eye protector manufacturer; d) other items of PPE likely to be worn simultaneously during use. Test in accordance with 6.3 and 6.4. The test report shall identify the specific items of other PPE used during these tests. NOTE 1 Compatibility with other items of work equipment (e.g. medical devices, thermal imaging cameras) which may be required in situations where the helmet/visor is intended to be used, cannot be explicitly included in the assessment. Such compatibilities should be assessed by potential purchasers. NOTE 2 Only frames for corrective eyewear which have been shown to be compatible with the visor / helmet should be used. SIST EN 14458:2004
EN 14458:2004 (E) 7 5.2.6 Resistance to extremes of temperature The visor/helmet assembly shall show no apparent deformation when subjected to the series of thermal conditions according to Clause 6.2.4 of EN 443:1997. At the end of each of the periods a) to e) of that Clause, the raising/ lowering mechanism for the visor shall operate correctly in accordance with the manufacturer’s instructions. Optionally, period a) of the sequence may be conducted at –20 oC, -30 oC or 40 oC (all ± 2 oC). Where one of these lower temperatures is used, conditioning at -10oC is not required. The test report shall identify the temperature used. Visors shall match or exceed the extremes of temperature against which designated helmets have been tested for thermal shock. 5.2.7 Resistance to corrosion After having undergone the test for resistance to corrosion specified in Clause 8 of EN 168:2001, all metal parts of the visor and carrier assembly shall display smooth surfaces, free from corrosion, when they are examined by a trained observer. 5.2.8 Vision The optical properties of the ocular shall meet the minimum requirements specified in Table 1. Table 1 - 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, 7.1.2.2 for relevant documents Diffusion of light 0.75 cd/m2.lx EN 167:2001, Clause 4 Quality of material surface EN 166:2001, 7.1.3 EN 167:2001, Clause 5
The visor, marked in accordance with the requirements of 7, shall not reduce the available field of vision provided by the helmet(s) for which it is designated. Test in accordance with 6.4. There shall be no undue distortion of vision as subjectively determined during testing in accordance with 6.4. 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. After application of anti-fogging compounds, the visor shall continue to meet the requirements of either 5.2.15 or 5.3.3. 5.2.9 Ergonomics The visor/helmet assembly shall undergo practical performance tests under realistic conditions in accordance with 6.4. These general tests serve the purpose of checking for shortcomings that cannot be determined by the tests described elsewhere in this document. Where practical performance tests show the visor/helmet assembly has shortcomings related to wearer acceptance, the test house shall provide full details of those parts of the practical performance tests, which revealed these imperfections. This will enable other test houses to duplicate the tests and assess the results thereof.
Specific aspects of the practical performance of the visor/helmet assembly, which shall be examined, are given in Clauses 5.2.10 and 5.2.11. SIST EN 14458:2004
EN 14458:2004 (E) 8 5.2.10 Fitting and adjustment Where parts of the assembly are designed to be adjustable or replaceable, this shall be achievable by hand, without the aid of special tools. Test in accordance with 6.3. 5.2.11 Positioning and operation The visor shall be moveable between an in-use (protective) position, and an out-of-use (standby) position. The visor shall park in the two positions, requiring a deliberate action on the part of the wearer to enable movement from one position to the other. If the visor is able to park in intermediate positions, a warning shall be provided in the information supplied (see Clause 8) that the stated levels of protection are only provided when the visor is fully in the in-use position. Movement of the visor shall not cause contact of the viewing surface with any part of the helmet. This requirement shall also be met during assessment of the resistance of the equipment to extremes of temperature (5.2.6 or 5.3.5 as appropriate). No part of the visor shall come into contact with the face of the wearer (or any designated corrective eyewear), in any position. Use and positioning of the visor shall be achievable using both left and right hands, singly. For visors for firefighting use (see 5.3), this action shall be achievable without difficulty while wearing gloves conforming to EN 659. Test in accordance with 6.4. 5.2.12 Area of coverage Visors shall meet one of the following requirements for area of coverage. 5.2.12.1 Face guard In the in-use position, the face guard in conjunction with designated helmet(s) shall cover at least the facial region rectangle EFGH of the appropriate headform, defined in Figure 11 of EN 168:2001, when assessed in accordance with EN 168:2001, 10.2. 5.2.12.2 Eye guard In the in-use position, the eye guard, in conjunction with designated helmet(s) shall cover at least the rectangle CDEF of the appropriate headform, defined in Figure 11 of EN 168:2001, when assessed in accordance with EN 168:2001, 10.2. NOTE Eye guards will offer little or no protection to substantial areas of the face. They should only be used where an adequate risk assessment indicates that facial protection is not required. 5.2.13 Electrical properties Where a designated helmet satisfies any of the mandatory or optional requirements of EN 443 for electrical properties, the visor shall satisfy the requirements of 5.8.1 and 5.8.3 of EN 443:1997, when tested according to 6.5.1 and 6.5.2 respectively. Where the designated helmet does not satisfy such requirements, the visor assembly may optionally satisfy the requirements of 5.8.1 and 5.8.3 of EN 443:1997, when tested according to 6.5.1 and 6.5.2 respectively. SIST EN 14458:2004
EN 14458:2004 (E) 9 5.2.14 Protection against high speed particles Before testing for resistance to high-speed particles, the visor/designated helmet assemblies shall be subjected to the relevant series of conditions as described in Clauses 5.2.6 or 5.3.5, and subsequently allowed to return to ambient temperature. The visor in the in-use position, in conjunction with designated helmet(s) shall meet at least the requirements of 7.2.2 of EN 166:2001 for Medium Energy Impact (class B), together with: a) on impact, no part of the visor shall come into contact with any part of the headform (or any designated corrective eyewear); b) after impact, the raising / lowering mechanism of the visor shall operate normally. 5.2.15 Flammability When tested using the method described in 6.6 of EN 443:1997 (but conditioned only by 6.2.2 of that document after cleaning 5 times in accordance with 5.2.4 above, and final application of any anti-fogging compound, if specified), materials shall not show: a) any drip during the whole test; b) visible flame or glowing combustion 5s after removal from the test flame. The outside centre and the lower edge of the visor, and on any exposed components of the raising / lowering mechanism and means of fixing shall be tested on two samples. NOTE This flammability requirement need not be assessed for visors intended for firefighters’ use. More stringent flammability requirements and tests are specified for these at Clause 5.3.3 and 6.8 below. 5.2.16 Resistance to chemicals Visor assemblies shall be tested against at least the chemicals listed in Table 2, according to the procedure at 6.10. Visor assemblies shall continue to satisfy the following requirements: a) there shall be no visible damage to the assembly; b) optical properties of the ocular shall continue to meet the requirements of 5.2.8; c) 6.4.4 b), c) and f) shall be reported again, and 6.4.4 (g) shall be retested; d) protection against high-speed particles according to 5.2.14 or 5.5.3 (without the prior conditioning according to 5.2.6 or 5.3.5) and 5.5.4, as appropriate. e) flammability according to 5.2.15 or 5.3.3 as appropriate (without further conditioning) Where testing is carried out using chemicals in addition to those listed in Table 2, details shall be included in the information supplied with the equipment. Table 2 - List of chemicals for resistance testing of visor assemblies Chemical Concentration weight % Sulphuric acid 30 (aqueous) Sodium hydroxide 10 (aqueous) p-Xylene Undiluted Butan-1-ol Undiluted n-Heptane Undiluted SIST EN 14458:2004
EN 14458:2004 (E) 10
5.3 Additional requirements for firefighters’ use In addition to relevant requirements of 5.2, visors for firefighters’ use shall meet the following requirements. 5.3.1 Radiant heat resistance 5.3.1.1 In-use position One visor shall be exposed according to 6.6.1. No part of the visor shall melt, drip or ignite, nor come into contact with any part of the headform. After the exposure, and allowing the visor to cool to ambient temperature for at least 60 minutes, it shall continue to satisfy the requirements for protection against high-speed particles according to 5.2.14 (optionally 5.5.3 and / or 5.5.4), and there shall be no distortion of vision (5.2.8 and 6.4.4). 5.3.1.2 Out of use position One visor shall be exposed according 6.6.2. No part of the visor shall ignite or come into contact with the test headform. 5.3.2 Radiant heat protection The visor, supported on its carrier and in the in-use position, shall be tested according to 6.7. Information on the performance achieved shall be included in the information supplied by the manufacturer (8 s)). NOTE For most visor materials, radiant heat protection varies significantly with the temperature of the heat source. Provision of this information is essential to allow the user to select the optimum protective equipment for their application. 5.3.3 Flammability When tested according to 6.8, no part of the visor or means of fixing shall show: a) any drip during the whole test; b) visible flame or glowing combustion 5s after removal from the test flame. 5.3.4 Resistance to molten metals and hot solids Visors and their means of fixing to the designated helmet(s) shall meet the requirements of e), f) and g) of 7.2.3 of EN 166:2001. 5.3.5 Extremes of temperature The visor/helmet assembly shall show no apparent deformation when subjected to the series of thermal conditions given in Clause 6.9. At the end of each of the periods a) to e), the raising/lowering mechanism for the visor shall operate correctly in accordance with the manufacturer’s instructions. Visors shall match or exceed the extremes of temperature against which designated helmets have been tested for thermal shock. SIST EN 14458:2004
EN 14458:2004 (E) 11 5.4 General requirements for mesh visors Mesh visors for use with emergency service helmets shall meet the general requirements of this document except 5.2.3, 5.2.8, 5.2.13 and 5.2.16. NOTE For 5.2.5 it is anticipated that for chainsaw use, hearing protection will be required simultaneously.
In addition, mesh visors shall meet the following requirements of EN 1731: 4.1.5 – Number of apertures in a mesh 4.3.1 – Luminous transmittance 4.3.2 – Variations in luminous transmittance Field of vision shall be considered adequate during testing according to 6.4 (practical performance test). 5.5 Optional requirements 5.5.1 General Where a manufacturer claims performance in any of the areas covered by Clauses 5.5.2 to 5.5.6, the requirements of the relevant Clause shall be met. 5.5.2 Optical filtering performance Visors (except mesh) shall conform to the requirements for filtering of optical radiation, as given in Table 3. Table 3 - Optional optical properties of visor oculars Property Requirement Test according to: Ultraviolet protection EN 170:2002, Clause 5 EN 167:2001, Claus
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