1、DEUTSCHE NORM Amil 2001 Respiratory protective devices - Methods of test Part 1 : Determination of inward leakage and total inward leakage English version of DIN EN 13274-1 DIN - EN 13274-1 ICs 13.340.30 Atemschutzgerte - Prfverfahren -Teil 1 : Bestimmung der nach innen gerichteten Leckage und der g
2、esamten nach innen gerichteten Leckage European Standard EN 13274-1 : 2001 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been prepared by CEN/TC 79 Respiratory protective devices. The responsible German body involved in its preparation w
3、as the Normenausschuss Feinmechanikund Optik (Optics and Precision Mechanics Standards Committee). EN comprises 28 pages. No pari of this standard may be reproduced without the prior permission of Ref. No. DIN EN 13274-1 : 2001 -0 Y Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 107
4、72 Berlin, Germany, s the exclusive right of sale for German Standards (DIN-Normen). English price group 13 Sales No. 11 13 08.01 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 : Determin
5、ation 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 lintrieur Atemschutzgerte - Prfverfahren - Teil 1 : Bestimmung der nach innen gerichteten Leckage und der gesam- ten
6、nach innen gerichteten Leckage This European Standard was approved by CEN on 2001 -01 -01. 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. Up-to-date li
7、sts and bibliographical references concerning such national stand- ards may be obtained on application to the Management Centre or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the respo
8、nsibility 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, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, t
9、he Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen 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 a
10、nd by any means reserved worldwide for CEN national members. Ref. No. EN 13274-1 : 2001 E Page 2 EN 13274-1 : 2001 Contents Page Foreword . 3 Introduction . 4 1 Scope . 4 2 Normative references . 4 3 Terms and definitions 4 4 Prerequisites . 4 5 General test requirements . 5 6 Principle 5 7 Material
11、 permeability test . 5 8 Device preparation . 6 9 Test 9 Annex A (normative) Test results . Uncertainty of measurement 28 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives . 28 Page 3 EN 13274-1 : 2001 Foreword This Europe
12、an Standard has been prepared by Technical Committee CEN/TC 79 “Respiratory protective devices“, the secretariat of which is held by DIN. 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 July 2001,
13、 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 Trade Association, and supports essential requirements of EU Directive(s). For relationship with E
14、U Directive(s), see informative Annex ZA, which is an integral part of this standard. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, F
15、rance, 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 1 : Determination of inward leakage and total inward leakage Part 2: Practical performance tests Part
16、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 penetration Part 8: Determination of dolomite dust clogging Page 4 EN 13274-1 : 2001 Introduction This E
17、uropean Standard is intended as a supplement to the specific device standards for respiratory protective devices. Test methods 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 d
18、evice standard. 1 Scope This European Standard specifies the general procedure for determining: a) b) excluding any filter penetration or c) the inward leakage of facepieces or inward leakage of respiratory protective devices (RPD), which is the total inward leakage total inward leakage of respirato
19、ry protective devices. Device preparation, selection of test subjects, test procedure and the method of calculation of leakage 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 Stand
20、ard incorporates, by dated or undated 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 amendments to, or revisions of any of these publications apply t
21、o this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 132 Respiratory protective devices - Definitions of terms and pictograms EN 136 EN 140 Respiratory protective de
22、vices - Full face masks - Requirements, testing, marking Respiratory protective devices - Half masks and quarter masks - 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
23、this European Standard, the terms and definitions given in EN 132 apply. 4 Prerequisites In order to implement this standard, at least the following parameters shall be specified in the relevant device standard: - the number of samples; Page 5 EN 13274-1 : 2001 - device preparation; - the selection
24、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 applicable); - characteristics to be assessed subjectively; - pass/fail criteria. 5 General test requirements Unless otherwise specified, the
25、 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 subject to a tolerance of 5%. Unless otherwise specified, the ambient temperature for testing shall be between 16 OC and 32 “C and the tem
26、perature limits shall be subject to an accuracy of 1 OC. 6 Principle A test subject wearing the device 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
27、 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 test and is chosen according to the guidance given in the following clauses. Dilution of the test atmosphere by clean air emanati
28、ng 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 permeability test 7.1 Principle This test serves the purpose of determining, particularly in case of doubt, which method shall
29、 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 wetted by a liquid and has a film of the same liquid applied to its upper surface. If bubbles escape continuously from the up
30、per 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 chloride methods are equally acceptable options. If a facepiece or its seal to the wearer is made of impermeable materials or is obvi
31、ously open to the atmosphere, inward leakage may be tested with either sodium chloride or sulfur hexafluoride. 7.2 Apparatus NOTE See Figure 1. Page 6 EN 13274-1 : 2001 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 w
32、ith 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 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
33、specimens Take the test 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 mm of test liquid for a period of not less than 3 min. Remove the test specimen from the t
34、est 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 undersutface of the test specimen until bubbles escape, or up to a maximum of 100 mbar, whichever occurs first. Note whether any bubble
35、s 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 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 haza
36、rd. Prepare the devices to be tested in accordance with their design and with whether the inward leakage of a facepiece or 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 determ
37、inations of inward leakage and total inward leakage, subject to the requirements of Table 1. Page 7 EN 13274-1 : 2001 TYPE OF DEVICE Facepiece (EN 136 or EN 140) Particles Table 1 - Selection of test agent TEST AGENT RESULT Permeable device Non-permeable device NaCI Or sF6 I.L. NaCI NaCI T.I.L. Filt
38、ering devices Gas Combined sF6 NaCI Or sF6 I.L. NaCI and sF6 - I.L. and T.1.L NaCI T.I.L. Breathing apparatus I.L. = Inward leakage T.I.L. = Total inward leakage sF6 NaCI Or sF6 I.L. 8.2 Sample tubes and probe In order to sample and analyse the air inside the facepiece, punch a hole in the facepiece
39、 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 1 Vmin is employed when sodium chloride is used. This is to minimize conde
40、nsation 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 calculations are p
41、erformed. 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 prevent distortion
42、 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 concentration o
43、f 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 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
44、EN 13274-1 : 2001 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 i
45、nward 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 preparation - inward leakage The inward leakage of facepieces
46、 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 para
47、graphs referring to breathing resistance, fitting and support of the hose apply here. The inward leakage of facepieces in accordance with EN 136 or EN 140 and not incorporating a threaded connection in accordance with EN 148-1, and of all filtering devices, is the total inward leakage excluding any
48、filter penetration. For the determination of inward leakage, clean air shall be supplied to the device under test. The breathing resistance of the modified device shall be similar to that of the complete device. It is important that the attachment of the clean air hose to the device does not affect
49、the fit of the device on the test subject nor should its fitting replace any seals incorporated in the device. If necessary the hose should be supported. An alternative method of measuring inward leakage of filtering devices is to replace gas filters or combined filters by surrogate high efficiency particle filters of the same mass and resistance. The results of a total inward leakage test using sodium chloride aerosol may then be equated to the inward leakage of the device. It is important that the attachment of the surrogate filters does not affect the fit of the device,
