1、STD-BSI BS EN 13274-L-ENGL 2OOL 111 Lb2Libb9 0900398 328 I BRITISH STANDARD Respiratory protective BSEN devices -Methods of test - Part 1: Determination of inward leakage and total inward leakage The European Standard EN 13274-1:2001 has the status of a British Standard ICs 13.340.30 13274-1:2001 NO
2、 COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN 13274-L-ENGL 2001 = 1624667 0900399 264 BS EN 13274-1:2001 Amd. No. National foreword Date Comments This British Standard is the official English language version of The UK participation in its preparation was entrust
3、ed by Technical Committee PH/4, Respiratory protection, to Subcommittee PH/4/9, Test methods, which has the responsibility to: EN 13274-1:2001. - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and ke
4、ep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or Europea
5、n publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessar
6、y provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This British Standard, having been prepared under the direction of the Health and Environment Sector Com
7、mittee, was published under the authority of the Standards Committee and comes into effect on 15 March 2001 Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 28, an inside back cover and a back cover. The BSI copyright date displayed in this
8、 document indicates when the document was last issued. 8 BSI 03-2001 ISBN O 580 87080 1 STD=BSI BS EN L3274-L-ENGL 2OOL Lb24669 0700400 806 EUROPEAN STANDARD EN 13274-1 NORME EUROPEENNE EUROPISCHE NORM January 2001 ICs 13.340.30 English version Respiratory protective devices - Methods of test - Part
9、 1: Determination of inward leakage and total inward leakage Appareils de protection respiratoire - Mthodes dessai - Partie 1: Dtermination de la fuite vers lintrieur et de la fuite totale vers Iintrieur Atemschutzgerte - Prfverfahren -Teil 1: Bestimmung der nach innen gerichteten Leckage und der ge
10、samten nach innen gerichteten Leckage This European Standard was approved by CEN on I January 2001. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Upto
11、ilate lists and bibliographical references concerning such national standards may be obtained on application to the 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 th
12、e responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg
13、, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMiTEE FOR STANDARDIZATION COMITB EUROPBEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any me
14、ans reserved worldwide for CEN national Members. Ref. No. EN 13274-1:2001 E STD-BSI BS EN l3274-l-ENGL 2001 = lb24669 070040L 742 Page 2 EN 13274-1 2001 Contents Page Foreword Introduction 1 Scope . 2 Normative references . 3 Terms and definitions 4 Prerequisites . 5 General test requirements . 6 Pr
15、inciple . 7 Material permeability test 8 Device preparation . 9 Test Annex A (normative) Test results - Uncertainty of measurement Annex ZA (informative) Clauses of this European Standard addressing essential 3 4 4 4 4 5 5 5 5 6 9 27 requirements or other provisions of EU Directives 28 Q BSI 03-2001
16、 STD-BSI BS EN 13274-1-ENGL 2001 m 1624bb 0900402 689 Page 3 EN 13274-1 2001 Foreword This European Standard has been prepared by Technical Committee CENTTC 79, Respiratory protective devices, the Secretariat of which is held by DIN. This European Standard shall be given the status of a national sta
17、ndard, either by publication of an identical text or by endorsement, at the latest by July 2001, and conflicting national standards shall be withdrawn at the latest by July 2001. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Tr
18、ade Association, and supports essential requirements of EU Direct ive( s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries a
19、re bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. It is one of several parts, which are as follows: Part I :
20、 Determination of inward leakage and total inward leakage; Part 2: Practical performance tests; Part 3: Determination of breathing resistance; Part 4: Flame tests; Part 5: Climatic conditions; Part 6: Determination of carbon dioxide content of inhalation air; Part 7: Determination of particle filter
21、 penetration; Part 8: Determination of dolomite dust clogging. O BSI 03-2001 STDOES1 ES EN 13234-1-ENGL 2001 = Lb24bbq 0900403 515 Page 4 EN 13274-1 12001 Introduction This European Standard is intended as a supplement to the specific device standards for respiratory protective devices. Test methods
22、 are specified for complete, or parts of, devices. If deviations from the test method given in this standard are necessary, these deviations will be specified in the relevant device standard. 1 scope This European Standard specifies the general procedure for determining: a) the inward leakage of fac
23、epieces; or b) inward leakage of respiratory protective devices (RPD), which is the total inward leakage excluding any filter penetration; or c) total inward leakage of respiratory protective devices. Device preparation, selection of test subjects, test procedure and the method of calculation of lea
24、kage are included. Two methods are described, one using an aerosol (sodium chloride aerosol) and one using a gas (sulfur hexafluoride). 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited
25、at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to, or revisions of, any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition
26、 of the publication referred to applies (including amendments). EN 132, Respiratory protective devices - Definitions of terms and pictograms. EN 136, Respiratory protective devices - Full face masks - Requirements, testing, marking. EN 140, Respiratory protective devices - Half masks and quarter mas
27、ks - Requirements, testing, marking. EN 148-1 , Respiratory protective devices - Threads for facepieces - Part 1: Standard thread connection. 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 132 apply. 8 BSI 03.2001 Page 5 EN 13274-1 12001 4 P
28、rerequisites In order to implement this standard, at least the following parameters shall be specified in the relevant device standard: - the number of samples; - device preparation; - the selection and number of test subjects; - any prior conditioning or testing; - test method (1, 2A, 28); - any de
29、viations from the method; - use of supplementary fans (if applicable); - characteristics to be assessed subjectively; - pass/fail criteria. 5 General test requirements Unless otherwise specified, the values stated in this European Standard are expressed as nominal values. Except for temperature limi
30、ts, values which are not stated as maxima or minima shall be subject to a tolerance of +5 %. Unless otherwise specified, the ambient temperature for testing shall be between 16 “C and 32 “C and the temperature limits shall be subject to an accuracy of 11 “C. 6 Principle A test subject wearing the de
31、vice on test, walks on a horizontal treadmill surrounded by an atmosphere containing a known concentration of a test substance. Two types of challenge atmosphere are specified, one using sodium chloride and the other using sulfur hexafluoride, and the general principle of the test is the same for ei
32、ther substance. The substance used depends on the type of equipment under test and is chosen according to the guidance given in the following clauses. Dilution of the test atmosphere by clean air emanating from the device under test does not affect the accuracy of the measurement of leakage because
33、of the large volume and continuous replacement of the atmosphere. 7 Material permeability test 7.1 Principle This test serves the purpose of determining, particularly in case of doubt, which method shall be used for the determination of inward leakage of the facepiece. A specified air pressure is ap
34、plied to the material of the facepiece and/or its seal to the wearer, which is wetted by a liquid and has a film of the same liquid applied to its upper surface. If bubbles escape continuously from the upper surface, the material is rated as permeable and the sulfur hexafluoride method is to be used
35、. If no bubbles escape continuously, the sulfur hexafluoride and sodium chloride methods are equally acceptable options. If a facepiece or its seal to the wearer is made of impermeable materials or is obviously open to the atmosphere, inward leakage may be tested with either sodium chloride or sulfu
36、r hexafluoride. O BSI 03-2001 1, STDmBSI BS EN 13274-1-ENGL 2001 M 1624669 0900405 398 = Page 6 EN 13274-1 12001 7.2 Apparatus NOTE: See Figure 1. 7.2.1 Testing head. A cylindrical vessel over which the test specimen is clamped by a clamping ring and screw. The head is fitted with a gasket to make a
37、 seal against the test specimen. 7.2.2 Test liquid. Water in which a wetting agent (softener or washing-up liquid) is dissolved to form a solution by adding a few drops to 1 I of water. 7.2.3 Pressure measuring device 7.2.4 Air supply and control valves 7.3 Preparation of test specimens Take the tes
38、t specimens from different places in the device in order that an assessment can be made of all materials and seams. 7.4 Procedure Soak the conditioned test specimen under approximately 15 rnm of test liquid for a period of not less than 3 min. Remove the test specimen from the test liquid and clamp
39、it in the testing head. Pour sufficient test liquid on to the surface of the test specimen to form a continuous film. Apply air pressure to the undersurface of the test specimen until bubbles escape, or up to a maximum of 100 mbar, whichever occurs first. Note whether any bubbles escape from the upp
40、er surface of the test specimen indicating that the material is permeable. Repeat the test with the other test specimens. 8 Device preparation 8.1 General Prior to the inward leakage test, examine the device to see that it is in good working condition and can be used without hazard. Prepare the devi
41、ces to be tested in accordance with their design and with whether the inward leakage of a facepiece, the inward leakage of a device, or the total inward leakage of a device is to be determined. The sodium chloride and sulfur hexafluoride methods are equally acceptable for determinations of inward le
42、akage and total inward leakage, subject to the requirements of Table 1. O BSI 03-2001 Page 7 EN 13274-1 12001 Face piece IEN 136 or EN 140) Filtering Particles devices Gas Combined Table 1 - Selection of test agent Permeable device Non-permeable device - NaCI or sF6 I.L. NaCI NaCI T.I.L. s F6 NaCI o
43、r sF6 I.L. NaCI and SF6 - I.L. and T.1.L PIPE OF DEVICE I TEST AGENT 1 RESULT I Breathing apparatus sF6 NaCI or SF6 I.L. I I NaCI I T.I.L. I - I.L. = Inward leakage T.I.L. = Total inward leakage 8.2 Sample tubes and probe In order to sample and analyse the air inside the facepiece, punch a hole in t
44、he facepiece and insert a probe through which the sample is drawn by a suitable sample pump. A multiple hole sampling probe is strongly recommended. Figures 2 to 6 show designs that have been found suitable. Drying air at a flow of about I Ilmin is employed when sodium chloride is used. This is to m
45、inimize condensation and hence loss of sodium chloride particles in the sampling tube. The sample flow rate from the facepiece is equal to the total flow through the sample pump minus the amount of drying air used. Allowance has to be made for the diluting effect of this clean air when leakage calcu
46、lations are performed. Drying air is not used if sulfur hexafluoride is the test agent. Fit the probe securely in an airtight manner to the facepiece, as near as possible to the mouth of the wearer. For flexible or soft facepieces it may be necessary to fit a head harness to the test subject to prev
47、ent distortion of facepiece or inability to create a seal due to failure of the harness to support the probe assembly weight. This harness can then carry the sampling probe and associated connections and pressure probe for pulsed sampling. A second sampling probe is provided to measure the ambient c
48、oncentration of test agent in the test enclosure. This shall be placed away from the effect of any exhalate from the device under test. lhe sampling probes are connected to the analysing equipment by means of flexible thin-walled tubing of about 3 mm bore, the length of which is kept as short as pos
49、sible. O BSI 03-2001 Page 8 EN 13274-1 12001 8.3 Device preparation -total inward leakage For the determination of the total inward leakage, use the complete device. The preparation of the facepiece is as described in 8.2. In the case of a filtering device with a gas filter, the total inward leakage is assumed to equal the inward leakage (see 8.4), provided that the gas filter in its holder meets the requirements for the gas breakthrough time required in the appropriate filter standard and the facepiece does not incorporate gas permeable material. 8.4 Device preparati
