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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 174 : 1997 The Euro
2、pean Standard EN 174 : 1996 has the status of a British Standard ICS 13.340.20; 97.220.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Personal eye protection Ski goggles for downhill skiing Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:05:40 GMT+00:00 2006, Unc
3、ontrolled Copy, (c) BSI BS EN 174 : 1997 This British Standard, having been prepared under the direction of the Health and Environment Sector Board, was published under the authority of the Standards Board and comes into effect on 15 June 1997 BSI 1997 The following BSI references relate to the work
4、 on this standard: Committee reference PH/2/1 Draft for comment 93/309042 DC ISBN 0 580 27490 X Amendments issued since publication Amd. No.DateText affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PH/2/1, Sunglas
5、ses, upon which the following bodies were represented: Association of Consulting Scientists British Retail Consortium British Safety Industry Federation College of Optometrists Consumer Policy Committee of BSI Department of Health Electricity Association Federation of Manufacturing Opticians Flat Gl
6、ass Manufacturers Association Health and Safety Executive Institution of Mechanical Engineers Manufacturing Science Finance Ministry of Defence National Physical Laboratory Royal College of Ophthalmologists Safety Equipment Association Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:05:40
7、GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 174 : 1997 BSI 1997i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 1743 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:05:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BSI 1997 BS EN 174
8、: 1997 National foreword This British Standard has been prepared by Technical Committee PH/2/1, and is the English language version of EN 174 : 1996, Personal eye protection Ski goggles for downhill skiing, published by the European Committee for Standardization (CEN). Cross-references Publication r
9、eferred toCorresponding British Standard EN 165 : 1995BS EN 165 : 1996 Personal eye protection Vocabulary EN 166 : 1995BS EN 166 : 1996 Personal eye protection Specifications EN 167 : 1995BS EN 167 : 1995 Personal eye protection Optical test methods EN 168 : 1995BS EN 168 : 1995 Personal eye protect
10、ion Non-optical test methods EN 172 : 1994BS EN 172 : 1995 Specification for sunglare filters used in personal eye protectors for industrial use Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an in
11、side front cover, pages i and ii, the EN title page, pages 2 to 10, an inside back cover and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:05:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite Europe en de Normalisation Europa is
12、ches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 174 : 1996 E EUROPEAN STANDARDEN 174 NORME EUROPE ENNE EUROPA ISCHE NORM December 1996 ICS 13.340.10 Descriptors: Personal protective equipment, accident prevention,
13、eyes, safety masks, alpine skis, design, specifications, dimensions, field of visibility, mechanical strength, radiation resistance, tests, information English version Personal eye protection Ski goggles for downhill skiing Protection individuelle de loeil Masques pour le ski alpin Perso nlicher Aug
14、enschutz Skibrillen fu r alpinen Skilauf This European Standard was approved by CEN on 1996-11-07. 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-t
15、o-date lists and bibliographical references concerning such national standards 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 translation under
16、 the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlan
17、ds, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:05:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 174 : 1996 BSI 1997 Foreword This European Standard has been prepared by Technical Committee CEN/TC 85, Eye-protec
18、tive 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 June 1997, and conflicting national standards shall be withdrawn at the latest by June 19
19、97. This European Standard 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 sta
20、ndard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Sp
21、ain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 4Design and manufacture3 4.1General requirements3 4.2Materials3 4.3Sit and fit3 4.4Ventilation3 5Requirements3 5.1Optical requirements3 5.2Mechanical strength4 5.3Protection against
22、water and snow4 5.4Resistance to ignition4 5.5Suitability for cleaning and care4 5.6Optional specifications5 6Testing5 6.1Field of vision5 6.2Maximum reduced luminance coefficient5 6.3Resistance to ultraviolet radiation5 6.4Mechanical strength5 7Information for users7 Annexes A(normative) Spectral w
23、eighting functions for the calculation of solar UVA- transmittance values8 ZA(informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives9 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:05:40 GMT+00:00 2006, Uncontrolled Copy, (c)
24、BSI Page 3 EN 174 : 1996 BSI 1997 1) P. Moon, Journal of the Franklin Institute, Vol. 230 (1940), pp 583-617. 1 Scope This European Standard is applicable to goggles which are used for eye protection during downhill skiing. 2 Normative references This European Standard incorporates by dated or undat
25、ed reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendment to or revisions of any of these publications apply to this European Standard only when in
26、corporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 165 : 1995Personal eye protection Vocabulary EN 166 : 1995Personal eye protection Specifications EN 167 : 1995Personal eye protection Optical test methods EN 168 : 1995Pers
27、onal eye protection Non-optical test methods EN 172 : 1994Personal eye protection Sunglare filters for industrial use EN 1836 : 1997Personal eye protection Sunglasses and sunglare filters for general use 3 Definitions For the purposes of this standard, the definitions of EN 165 : 1995 apply together
28、 with the following: solar UVA-transmittance tSUVA Mean of the spectral transmittance from 315 nm to 380 nm weighted with the solar radiation Esl(l) at sea level for air mass 21)and the relative spectral effectiveness function for UV radiation S(l). The complete weighting function is the product of
29、both: W(l) = Esl(l)S(l). The weighting functions are given in annex A. tSUVAis defined by the following equation: tSUVA= tF(l)Esl(l)S(l)dl 315 nm 380 nm Esl(l)S(l)dl 315 nm 380 nm = tF(l)Wl(l)dl 315 nm 380 nm Wl(l)dl 315 nm 380 nm 4 Design and manufacture 4.1 General requirements Ski goggles shall b
30、e free from sharp edges or other defects which are likely to cause discomfort or injury during intended use. 4.2 Materials No parts of the eye-protector which are in contact with the wearer shall be made of materials which are known to cause any skin irritation. 4.3 Sit and fit Ski goggles shall sit
31、 reliably when used as intended and adopt to the contours of the face. The surfaces in contact with the face shall be made of soft flexible material. The head strap shall be designed to be flexible or adjustable and sit securely on the back of the head. The head strap shall withstand any stress whic
32、h occurs during proper use without tearing or being permanently deformed. 4.4 Ventilation Design measures shall ensure that the inside of the goggles is well ventilated during skiing. The necessary change of air and the design of the ventilation openings depend heavily on the weather, style of skiin
33、g and the individual conditions (e.g. sweating), which means that generally applicable requirements cannot be stipulated. 5 Requirements All eye-protectors shall meet the requirements given in 5.1 to 5.5 except for the optional specifications of table 2. Optional specifications related to additional
34、 properties of eye-protectors are given in 5.6. 5.1 Optical requirements 5.1.1 Field of vision Ski goggles shall exhibit a field of vision with the following minimum values: vertical: 55; horizontal: 150. The test shall be carried out in accordance with 6.1. 5.1.2 Lens requirements The lens requirem
35、ents are summarized in tables 1 and 2. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:05:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 174 : 1996 BSI 1997 Table 1. Requirements for lenses used in ski goggles for downhill skiing Optical powerIn accordance with 4.2 of EN 1836 : 19
36、97 TransmittanceIn accordance with table 2 Variations in luminous transmittanceIn accordance with 4.1.2 of EN 172 : 1994 Scattered light class 11,0 cd / m2 lx Maximum reduced luminance coefficient Scattered light class 22,0 cd / m2 lx Quality of material and surfaceIn accordance with 7.1.3 of EN 166
37、 : 1995 Resistance to ultraviolet radiationIn accordance with 4.6 of EN 1836 : 1997 Table 2. Permissible transmittance of lenses for downhill skiing Filter category RequirementsOptional specifications Ultraviolet spectral rangeVisible spectral rangeEnhanced infrared absorption Maximum value of spect
38、ral transmittance t(l) Maximum value of solar UVA transmittance Range of luminous transmittance tv Maximum value of solar infrared transmittance tSIR tSUVA 280 nm toover315 nm tofrom overto 315 nm315 nm to380 nm 350 nm% S 080,0100 S 10,3 tv0,3 tv43,080,0 S 20,03 tv18,043,0tv S 30,15 tv0,15 tv8,0018,
39、0 S 43,008,00 5.2 Mechanical strength The requirement is satisfied if the ski goggle withstands the impact of a steel ball when tested in accordance with 6.4: On so testing, the following defects shall not occur: a) ocular fracture: An ocular shall be considered to have fractured if it cracks throug
40、h its entire thickness into two or more pieces, or if the ball passes through the ocular. b) ocular deformation: An ocular shall be considered to have been deformed if a mark appears on the white paper on the opposite side to that struck by the ball. c) ocular housing or frame fracture: An ocular ho
41、using shall be considered to have failed if it separates into two or more pieces, or if it is no longer capable of holding an ocular in position, or if an unbroken ocular becomes detached from the frame, or if the ball passes through the housing or frame. 5.3 Protection against water and snow The sk
42、i goggle shall be designed so that no snow or water can penetrate the goggle. The result shall be considered to be satisfactory if no liquid enters the inside of the goggle during the test in accordance with clause 12 of EN 168 : 1995 when spraying from the front only. 5.4 Resistance to ignition Ski
43、 goggles shall be tested in accordance with the method specified in clause 7 of EN 168 : 1995 and shall be considered to be satisfactory if no part of the eye- protector ignites or continues to glow after removal of the steel rod. 5.5 Suitability for cleaning and care All parts of the eye-protector
44、shall be capable of withstanding, without visible change, cleaning in accordance with the manufacturers recommended methods. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:05:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 174 : 1996 BSI 1997 5.6 Optional specifications 5.6.1 Resi
45、stance to surface damage by fine particles If oculars are described as resistant to surface damage by fine particles they shall have a reduced luminance factor of : in surface damage by fine particles class 1;5,0 cd / m2 lx in surface damage by fine particles class2;10,0 cd / m2 lx following the tes
46、t specified in clause 15 of EN 168 : 1995. 5.6.2 Resistance to fogging Oculars If oculars are described as resistant to fogging they shall remain free from fogging for a minimum of 30 s when tested in accordance with clause 16 of EN 168 : 1995. NOTE. Resistance to fogging is a function of the antifo
47、g coating and the design of the goggle. 5.6.3 Enhanced infrared absorption Oculars If oculars are described as having enhanced infrared absorption, they shall comply with the last column of table 2. 6 Testing 6.1 Field of vision The size of the field of vision shall be measured with a perimeter in c
48、onjunction with the head-form in accordance with figure 11 of EN 168 : 1995. To measure the field of vision, the head-form shall be fitted with goggles in the arrangement shown in figure 1 in such a way that the two axes of revolution A and B and the optical axis C pass through the front of one eye.
49、 A laser beam max. 5 mm in diameter along C, for example, can be used as the radiation. If the set-up is turned about A, the difference of the angles at which the beam of light no longer hits the eye produces the vertical field of vision; if turned about B, the difference in the angle when the light beam is covered at the side and with one viewing direction of the test head parallel to C produces one half of the horizontal field of vision (see figure 1). 6.2 Maximum reduced luminance coefficient The maximum
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