1、STD-BSI BS EN 175-ENGL 1997 = Lb2YbbS b72302 112 m BRITISH STANDARD Personal protection - Equipment for eye and face protection during welding and allied processes The European standard EN 175 : 1997 has the status of a Britjshstandard ICs 13.34.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITT
2、ED BY COPYRIGHT LAW BS EN 175 : 1997 STD-BSI BS EN 175-ENGL 1997 Lb2qbb Ob72303 059 BS EN 176 : 1997 National foreword This British Standard is the English language Version of EN 175 : 1997. It supersedes Bs 1642 : 1982, which is withdrawn. The UKparticipation in its prepamlion was entrusted to subc
3、ommiaee FHAB, Indushkieyeprotectors, whichhastheresponsibilityto: - aid enquirers to understand the tea - present to the responsibe European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests inform* - monitor reW international and European developments
4、 and promulgate themintheuK. A list of organizatons represente on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement inmnational or European publications referred to in this document may be found in the BSI standards Cataiogue under the
5、 section entitled Intemational Sandards Correspondence Index, or by using the Find facility of the BSI Standarcis Eiedmnic catalogue. Compliance with a British Standard does not of itself confer immunity from legai obigations. Summary of pages “his document comprises a front cover, an inside front c
6、over, the EN e page, pages 2 to 10, an inside back cover and a back cover. ThisBritishstandard,having been prepared under the direction of the Health and Environment Sector Board, was pubished under the authority of the stanaards Board and comes into b) acing forwards and rotated 30 backwards about
7、horizontal axis A; c) rotated 90“ to the left about verlicai axis B and rotated 30 forwards about horizontal axis A d) rotated 90“ to the left about vertical axis B and rotated 30 backwards about horizontal axis A; e) rotated 90 to the right about vertical axis B and rotated 30 forwards about horizo
8、ntal axis A; f) rotated 90“ to the right about verticai axis B and rotated 30“ backwards about horizontal axis k NOTE. AGustments to the horizontai position of the heaform and the height of the laser can be necessary to locate the laser on the relevant points on the headfom. 8.1.4 Report If any of t
9、he marks made on the headom are within the area of the eye region redangle as defined in 6.3, ngUre 1, the area of coverage is considered to be insufficient 8.2 Drop test of welders shields 8.2.1 Principle The welders shields are dropped from a specified height on to a steel piate. 8.2.2 Apwm 8.2.2.
10、1 Smooth steel plate, not les than 500mmx500mmxlOmmthick 0.2.2.2 Meuns of .vuspmin.g wdding shW. 8.2.3 Conditionina One welders shield is conditioned for (120 3 min One welders shield is conditioned for (120 min 8.2.4 Proceure Remove the welders shield from the conditioning cabinet Suspend the welde
11、rs shield by the top of the shield Nust the height of the lowest point of the shield to (1,50 f 0,Ol) m above the steel piate. Drop the welders shield on to the piate within 10 s after movai from the conditioned cabinet. Immeiately after each drop the shield is reconditioned for at least 30 min. Rep
12、eat this procedure to complete 3 drops. 8.2.6 Report Any deformalion or permanent damage to the welding shield, ilter, or cover/backng oculais shall be Orded. at (-5 f 2) “C. at (80 f 2) “C. Q BSI 1997 STD-BSI BS EN 175-ENGL 1977 = Lb24bb7 Ob72311 125 Symbol S 9 -F -B W 8.3 Test for electrical insua
13、tion of welders shields 8.3.1 Principle The outer surface of the welders shield is covered with a damp cloth and placed on a meta plate. An electrical potenthi is applied between the metai piate and the inside of the shield The leakage ament is measured. 8.3.2 procedure Place the welders shield, whe
14、n fiaed with a recommended ocular, on the metai plate ensuring the greatest possible contact between the cloth and the Pk. Fit one electrode to the metal plate and the other is used as a contact testing kgeE A mii-amperemeter is COMC, in series, to either of the electrodes. Apply an alteniatjng volt
15、age, at (So i 5) Hz, of (440 f 10) Volts to the electrodes, make a minimum of 10 contacts with the testing mer to different points on the inside of the welders shield, touching in any case the ocular housing, paying particular attention to areas where metal components have been used in its construct
16、ion, and measure the leakage current 8.3.3 Report Any leakage which exceeds 1,2 mA 8.4 Test for light attenuation of welders shields 8.4.1 Pdnciple Place the welders shield, when fi- with a recommended ocular, directly in front of a light source. Then swivel the shield and make a check to ensure no
17、non-atknuated light rays are visible. This test shal be carried out on a welders shield that has been drop tested in accordance with 8.2. 8.4.2 Procedure Place the equipment to be tested directly in front of a light some with a minimum output of 1 200 lumens. Position the welding shield in such a wa
18、y that the centre of the light source is (500 f 10) mm away, on a perpendicular axis, to the centre of the ocular. Swivel the welding shield (20 +3 up and down on the verticai axis and (2450 +i) either side on the horizontal axis. 8.4.3 Report At each of the four points check that no non-attenuated
19、light rays are visible. 8.6 Test for water immersion (welders shields OdY) 8.6.1 Principle The welders shield is immemed in water for a period of time to determine its dimensional stability. Ippe of protection In- Mechanicalstrength robwines Molten metals and hot solids metals and Deecription of the
20、 field of use Splashes of molten penetration of hot solids Low energy impact Mechanical strength Medium energy Mechanicaldnmgth impact Water immersion Dimensional stability Page 7 EN 176 : 1997 8.6.2 Procedure The welders shield to be tested shaii already meet either of the criteria specified in cla
21、uses 8.2 or 6.3. huneme the welding shield in water at a temperature of (23 f 2) “C for a period of (120 f 5) min. Remove the welding shield and leave for (5 f 1) min. The dimensions of welders hand shields shall not vary by more than 5 %and shall sti meet the requirements of 6.2. Welders face shiel
22、ds shail stiil meet the requkments for the area of coverage as specified in 6.3. 8.6.3 Report Note the area of coverage, dimensions and dimension variations, as appropriate. 9lMUking 9.1 General In order to be able to idenm and use a welders protector as intended, it shall be permanently marked to i
23、ndicate its field of use. The marking shall be visible when the welding protector is assembled. 9.2 Frame marking The marking of hes or housings sha contain the relevant thnicai information as follows: a) identification of the manuf-q b) the number of this standard c) field(s) of use (where applicab
24、le); d) mass in grams (where applicable). NOTE. The identication mark may consist of one or more elements. BSI 1997 Page 8 EN 176 : 1997 The example below shows the principles of the designation: EXAMPLE : Welders face shield EN 175 S 9 where: EN 175 is the standard num-, S is increased robustness;
25、9 means protection against molten metais and hot solids. 10 Information for usem The manukctwer shall provide with each welders prokctor at least the following informaton a) name and address of the manufactureq b) the number of the standan$ c) model identicatioq d) instmhons for storage, use and mai
26、ntenance; e) specific instructions for cleaning and disinfection; f) details of suitable filters and cover andor backing -, g) details of field of use, protection capabilities and performance charactensti cs; h) details of suitable accessories, spare parts and inskuhorn for fiaing; i) the obsolescen
27、ce deadline or duraton of use until obsolescence, if applicable, for the complete welding protector andor component parts; j) the type of packaging suitable for transport, if applicable; k) the meaning of the mar-, 1) a warning that materials which may come into contact wilh the wearers skin could c
28、ause allergic reactions to susceptible individuals, m) a warning that scratched or damaged ocuII1Is should be replaced; n) details of limitatjon of use; o) a warning that toughened minerai niter oculars shall only be used in coIiiunctjon with a suitable backingocular. 8 BSI 1997 Page 9 EN 176 : 1997
29、 Annex A (informative) Guidance on design of welders shields This annex contains guidance on the design of welders shields. - The design of welders shield should be such that (2% build up in the respiratory area is minimized. - The lower part of any welders face shield should be designed so that wel
30、ding fumes are guided away from the respiratory area. - Welders shields of convex nature allow metal dmpleb to roli off readily in overhead welding SitUdiOnS. - Welders face shield fitted with oculars recommended by the manufadurer should be designed to be weli balanced. - The shield should, e.g. at
31、 the head gear, include a stopping mechankm in order that the shield shai not iqjure the throat when bei positioned downwards. - The shield should have low thermal condu-. - Welders face shields may include devices to protect the wearers ears, throat and respiratory tract O BSI 1997 STD.BSI BS EN 17
32、5-ENGL 1977 D Lb24bb9 Ob723L4 934 D Page 10 EN 176 : 1997 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives This European standard has been prepared under a mandate given to CEN by the European Commission and the EuropeanF
33、reelIadeAssouah on and supports essential requirements of EU Directives 89/6WEEC. WARNING. Other requirements and other EU Direcves may be applicable to the producys) The foliowing clauses of this standad are iikely to support requirements of Directive 89/6WEEC, Annex II: within the scope of this st
34、andad Directive 8MWEEC, Annex IJ I Clsuses of this stanard 1.1 1.2 1.3 1.4 2.3 2.4 2.9 3.1 3.3 3.6 3.8 3.9 Design principles Innocuousness of PPE comfort and efficiency Monnalion supplied by the manufacAww PPE for the face, eyes and respiratory imds PPE subject to ageing PPE incoIporating components
35、 which can be adjusted or removed by the user protection against mechanical irnpact Protection against physical iqjury (abrasion, perfomtion, cuts and bites) Protection against heat and/or Fax: O181 996 7001. in response to orers for internationai standards, it is BSI policy to supply the BSI implem
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