BS EN 13274-1-2001 Respiratory protective devices - Methods of test - Determination of inward leakage and total inward leakage《呼吸保护装置 试验方法 向内泄漏和总泄漏测定》.pdf

1、BRITISH STANDARD BS EN 13274-1:2001 Respiratory protective 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 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRI

2、GHT LAWBS EN 13274-1:2001 This British Standard, having been prepared under the direction of the Health and Environment Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 2001 BSI 03-2001 ISBN 0 580 37080 1 National foreword This British

3、Standard is the official English language version of EN 13274-1:2001. The UK participation in its preparation was entrusted by Technical Committee PH/4, Respiratory protection, to Subcommittee PH/4/9, Test methods, which has the responsibility to: A list of organizations represented on this subcommi

4、ttee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by us

5、ing the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunit

6、y from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summa

7、ry 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 document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments

8、EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13274-1 January 2001 ICS 13.340.30 English version Respiratory protective devices Methods of test Part 1: Determination of inward leakage and total inward leakage Appareils de protection respiratoire Mthodes dessai Partie 1: Dtermination de la fui

9、te vers lintrieur et de la fuite totale vers lintrieur Atemschutzgerte Prfverfahren Teil 1: Bestimmung der nach innen gerichteten Leckage und der gesamten nach innen gerichteten Leckage This European Standard was approved by CEN on 1 January 2001. CEN members are bound to comply with the CEN/CENELEC

10、 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 Management Centre or to any CEN me

11、mber. 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 Management Centre has the same status as the official versions. CEN members

12、 are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION

13、EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13274-1:2001 EPage 2 EN 13274-1:2001 BSI 03-2001 Contents Page Foreword 3 Introduction 4 1 S

14、cope . 4 2 Normative references. 4 3 Terms and definitions 4 4 Prerequisites . 5 5 General test requirements. 5 6 Principle. 5 7 Material permeability test 5 8 Device preparation. 6 9 Test 9 Annex A (normative) Test results Uncertainty of measurement 27 Annex ZA (informative) Clauses of this Europea

15、n Standard addressing essential requirements or other provisions of EU Directives 28Page 3 EN 13274-1:2001 BSI 03-2001 Foreword This European Standard has been prepared by Technical Committee CEN/TC 79, Respiratory protective devices, the Secretariat of which is held by DIN. This European Standard s

16、hall be given the status of a national standard, 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 Eu

17、ropean 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 standard. According to the CEN/CENELEC Internal Regulations, the national standards or

18、ganizations of the following countries are 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 sever

19、al parts, which are as follows: Part 1: 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; P

20、art 7: Determination of particle filter penetration; Part 8: Determination of dolomite dust clogging.Page 4 EN 13274-1:2001 BSI 03-2001IntroductionThis European Standard is intended as a supplement to the specific device standards for respiratory protective devices. Test methods are specified for co

21、mplete, 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 ScopeThis European Standard specifies the general procedure for determining:a) the inward leakage of facepieces; orb) inward lea

22、kage of respiratory protective devices (RPD), which is the total inward leakage excluding any filter penetration; orc) total inward leakage of respiratory protective devices.Device preparation, selection of test subjects, test procedure and the method of calculation of leakage are included. Two meth

23、ods are described, one using an aerosol (sodium chloride aerosol) and one using a gas (sulfur hexafluoride).2 Normative referencesThis European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in

24、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 of the publication referred

25、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 masks Requirements, testing, marking.EN 148

26、-1, Respiratory protective devices Threads for facepieces Part 1: Standard thread connection.3 Terms and definitionsFor the purposes of this European Standard, the terms and definitions given in EN 132 apply.Page 5 EN 13274-1:2001 BSI 03-20014 PrerequisitesIn order to implement this standard, at lea

27、st 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, 2B);- any deviations from the method;- use of supplementary fans (if appli

28、cable);- characteristics to be assessed subjectively;- pass/fail criteria.5 General test requirementsUnless otherwise specified, the values stated in this European Standard are expressed as nominal values. Except for temperature limits, values which are not stated as maxima or minima shall be subjec

29、t 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 1 C.6 PrincipleA test subject wearing the device on test, walks on a horizontal treadmill surrounded by an atmosphere

30、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 either substance. The substance used depends on the type of equipment under

31、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 of the large volume and continuous replacement of the atmosphere.7 Material

32、 permeability test7.1 PrincipleThis 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 applied to the material of the facepiece and/or its seal to the wearer, which is

33、 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. If no bubbles escape continuously, the sulfur hexafluoride and sodium chlori

34、de 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 sulfur hexafluoride.Page 6 EN 13274-1:2001 BSI 03-20017.2 ApparatusNOTE: See Figure

35、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 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

36、 by adding a few drops to 1 l of water.7.2.3 Pressure measuring device7.2.4 Air supply and control valves7.3 Preparation of test specimensTake the test specimens from different places in the device in order that an assessment can be made of all materials and seams.7.4 ProcedureSoak the conditioned t

37、est specimen under approximately 15 mm of test liquid for a period of not less than 3 min. Remove the test specimen from the test liquid and clamp 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 undersurfa

38、ce 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 upper surface of the test specimen indicating that the material is permeable. Repeat the test with the other test specimens.8 Device preparation8.1 General P

39、rior 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 devices 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 lea

40、kage of a device is to be determined. The sodium chloride and sulfur hexafluoride methods are equally acceptable for determinations of inward leakage and total inward leakage, subject to the requirements of Table 1.Page 7 EN 13274-1:2001 BSI 03-2001 Table 1 Selection of test agent TEST AGENT RESULT

41、TYPE OF DEVICE Permeable device Non-permeable device Facepiece (EN 136 or EN 140) - NaCl or SF 6 I.L. Filtering devices Particles NaCl NaCl T.I.L. Gas SF 6 NaCl or SF 6 I.L. Combined NaCl and SF 6 - I.L. and T.I.L - NaCl T.I.L. Breathing apparatus SF 6 NaCl or SF 6 I.L. I.L. = Inward leakage T.I.L.

42、= Total inward leakage 8.2 Sample tubes and probe In order to sample and analyse the air inside the facepiece, punch a hole in the 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 des

43、igns that have been found suitable. Drying air at a flow of about 1 l/min is employed when sodium chloride is used. This is to minimize 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

44、 pump minus the amount of drying air used. Allowance has to be made for the diluting effect of this clean air when leakage calculations 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 t

45、o the mouth of the wearer. For flexible or soft facepieces it may be necessary to fit a head harness to the test subject to prevent 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

46、 and associated connections and pressure probe for pulsed sampling. A second sampling probe is provided to measure the ambient concentration of test agent in the test enclosure. This shall be placed away from the effect of any exhalate from the device under test. The sampling probes are connected to

47、 the analysing equipment by means of flexible thin-walled tubing of about 3 mm bore, the length of which is kept as short as possible.Page 8 EN 13274-1:2001 BSI 03-2001 8.3 Device preparation total inward leakage For the determination of the total inward leakage, use the complete device. The prepara

48、tion 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 fi

49、lter standard and the facepiece does not incorporate gas permeable material. 8.4 Device preparation inward leakage The inward leakage of facepieces in accordance with either EN 136 or EN 140 and which incorporate a threaded connection in accordance with EN 148-1, is determined with the appropriate filter simulator fitted to the facepiece. Clean air is supplied to the facepiece via a lightweight hose. The conditions set out in the following paragraphs referring to breathing resistance, fitting and support of the ho