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1、BRITISH STANDARD BS EN 13274-3:2001 Respiratory protective devices Methods of test Part 3: Determination of breathing resistance The European Standard EN 13274-3:2001 has the status of a British Standard ICS 13.340.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 13274
2、-3:2001 This British Standard, having been prepared under the direction of the Health and Environment Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 07 November 2001 BSI 07 November 2001 ISBN 0 580 38618 X National foreword T
3、his British Standard is the official English language version of EN 13274-3:2001. The UK participation in its preparation was entrusted by Technical Committee PH/4, Respiratory protection, to Subcommittee PH/4/9, Test methods and interpretation, which has the responsibility to: A list of organizatio
4、ns represented on this subcommittee 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
5、Correspondence Index”, or by using 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 do
6、es not of itself confer immunity 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 p
7、romulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 18, 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 pub
8、lication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13274-3 September 2001 ICS 13.340.30 English version Respiratory protective devices - Methods of test - Part 3: Determination of breathing resistance Appareils de protection respiratoire - Mthodes dessai - Partie 3:
9、Dtermination de la rsistance respiratoire Atemschutzgerte - Prfverfahren - Teil 3: Bestimmung des Atemwiderstandes This European Standard was approved by CEN on 17 August 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Eu
10、ropean 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 member. This European Standard exists in three official versions (English
11、, 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 are the national standards bodies of Austria, Belgium, Czech Republic,
12、 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 EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B
13、-1050 Brussels 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13274-3:2001 E EN 13274-3:2001 (E) 2 Contents page Foreword3 Introduction.4 1Scope 4 2Normative references 4 3Terms and definitions4 4Pre-requisites.4 5General test
14、 requirements 5 6Method 1: Static breathing resistance.5 6.1Principle5 6.2Equipment.5 6.3Procedure .5 6.3.1Ambient conditions .5 6.3.2Procedure for filters.5 6.3.3Procedure for other devices.6 7Method 2 : Dynamic breathing resistance.6 7.1Principle6 7.2Equipment.7 7.3Procedure .7 7.3.1General7 7.3.2
15、Inhalation resistance .7 7.3.3Exhalation resistance7 Annex A (normative) Fitting procedure for hoods which seal around the neck and which may or may not incorporate a head harness .13 A.1Introduction13 A.2Principle13 A.3Apparatus .13 A.3.1Sheffield dummy head/torso.13 A.3.2Stand and elastic string,
16、for hoods which do not incorporate a head harness13 A.3.3Adjustable collar13 A.4Procedure .14 Annex B (normative) Test results - Uncertainty of measurement17 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives18 EN 13274-3:2
17、001 (E) 3 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 shall be given the status of a national standard, either by publication of an identical text or by endorseme
18、nt, at the latest by March 2002, and conflicting national standards shall be withdrawn at the latest by March 2002. 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 Dire
19、ctive(s). For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this standard. EN 13274-3 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 3: Determination
20、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 aerosol penetration of particle filters Part 8: Determination of dolomite dust clogging of particle filters The annexes A and B are norma
21、tive. According to the CEN/CENELEC Internal Regulations, the national standards organizations 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, Norwa
22、y, Portugal, Spain, Sweden, Switzerland and the United Kingdom. EN 13274-3:2001 (E) 4 Introduction This European 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 t
23、he 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 measurement of breathing resistance of filters for respiratory protective devices and respiratory protective dev
24、ices incorporating facepieces, except for diving for respiratory protective devices. The requirements and any special conditions for the apparatus, and of filter measurements are described in the relevant device standard. 2 Normative references This European Standard incorporates, by dated or undate
25、d 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 to this European Standard only when
26、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. 3 Terms and definitions For the purposes of this European Standard, the definitions given in EN 13
27、2 apply, together with the following: 3.1 inhalation resistance flow resistance of the device during inhalation 3.2 exhalation resistance flow resistance of the device during exhalation 3.3 static breathing resistance inhalation resistance or exhalation resistance at defined constant flow expressed
28、as a pressure difference measured between ambient and a specified point within the device 3.4 dynamic breathing resistance peak inhalation resistance or peak exhalation resistance at a defined sinusoidal flow expressed as a pressure difference measured between ambient and a specified point within th
29、e device 4 Pre-requisites In order to implement this European Standard, at least the following parameters shall be specified in the relevant device standard: ? number of specimens; ? specimen pre-conditioning; EN 13274-3:2001 (E) 5 ? which test method (1 or 2); ? mounting of the specimen; ? preparat
30、ion of the specimen; ? which flow rates; ? deviations; ? number of repeat tests per specimen; ? size of facepiece; ? orientation of support for device; ? pass/fail criteria. 5 General test requirements Unless otherwise specified, the values stated in this European Standard are expressed as nominal v
31、alues. Except for temperature limits, values which are not stated as maxima or minima shall be subject to a limit deviation 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 a limit deviation of + 1
32、 C. 6 Method 1: Static breathing resistance 6.1 Principle The device is mounted on a support as described in the relevant device standard, and air is passed through the device at a constant flow. NOTE The convention of reporting breathing resistance is that if during the inhalation resistance test,
33、the pressure inside the facepiece relative to atmosphere is negative, no sign is used in front of the result. If the relative pressure inside the facepiece is positive, the result is prefixed with a +. 6.2 Equipment 6.2.1Pressure gauge, calibrated in the appropriate range and with a sensitivity bett
34、er than 10% of the limit value of breathing resistance specified in the relevant device standard. 6.2.2Flowmeter(s) calibrated in the appropriate range. 6.2.3Regulated blower/compressed air source or a variable suction device. 6.2.4Support for the device (e.g. filter holder, Sheffield dummy head wit
35、h insert or torso with insert) as described in the relevant device standard. 6.3 Procedure 6.3.1 Ambient conditions If ambient conditions differ from 23 C and 1 bar absolute, all flow rates shall be adjusted so that they give the correct flow rate when corrected to 23 C and 1 bar absolute. 6.3.2 Pro
36、cedure for filters Two methods of passing air through the filter are possible and typical examples are shown in Figures 1a) and 1b). The first method employs a chamber in which the filter holding device is fixed (see Figure 1a). Air is directed into EN 13274-3:2001 (E) 6 the chamber from a suitable
37、controlled source and exits through the filter and holder system. The pressure drop across the system to ambient is measured at a pressure tapping mounted on the chamber wall. The second method draws air through the filter holding device (see Figure 1b) and the pressure drop is measured between ambi
38、ent and a pressure port fitted at a suitable point between the filter holding system and the connection to the suction device. Ensure that the filter has been pre-conditioned according to the relevant device standard and that an equipment connector or the holder intended by the manufacturer to be us
39、ed is available. Mount the filter in a leaktight manner for horizontal airflow as indicated in Figures 1a) or 1b). Pass the appropriate airflow through the filter holding system. Measure and record the pressure drop, ?PF, across the filter holding system Remove the filter. Pass the same airflow thro
40、ugh the filter holding system. Measure and record the pressure drop, ?PH , of the set-up. Report the breathing resistance of the filter at the flow rate as: ?PF - ?PH 6.3.3 Procedure for other devices Ensure that the device has been pre-conditioned according to the relevant device standard. Fit the
41、device in a leaktight manner without deformation on the Sheffield dummy head (see Figure 2) or torso (see Figure 3). Close off the tube for exhalation air, and the pressure port on the exhalation tube shown in Figure 3. See also Figure 4. For hoods fitting around the neck, the fitting procedure give
42、n in annex A (see Figure A.1) shall be used. For measurements of inhalation resistance, connect the inhalation tube to a suitable suction device and the pressure gauge connections to the pressure port and ambient respectively. Note the “zero“ reading. Switch on and adjust the suction device to give
43、the appropriate flow and note the pressure reading. Record the reading, corrected for the “zero“ reading, as the inhalation resistance. For measurements of exhalation resistance, connect the exhalation tube to a suitable blower and the pressure gauge connections to the pressure port and ambient resp
44、ectively. Note the “zero“ reading. With the support in one of the five defined orientations, a) upright and facing directly ahead; b) facing vertically, upwards; c) facing vertically, downwards; d) lying on the left side; e) lying on the right side; switch on and adjust the blower to give the approp
45、riate flow and note the pressure reading. Record the reading, corrected for the “zero“ reading, as the breathing resistance on exhalation at that orientation. Repeat the procedure with the support successively placed in the other orientations. Report the highest value of the five results as the exha
46、lation resistance. 7 Method 2 : Dynamic breathing resistance 7.1 Principle The device is mounted on a support as described in the relevant device standard and connected to a breathing machine adjusted to a specified breathing minute volume. EN 13274-3:2001 (E) 7 NOTEThe convention of reporting breat
47、hing resistance is that if during the inhalation resistance test, the pressure inside the facepiece relative to atmosphere is negative, no sign is used in front of the result. If the relative pressure inside the facepiece is positive, the result is prefixed with a +. 7.2 Equipment 7.2.1Breathing mac
48、hine performing sinusoidal breathing. 7.2.2Support as described in the relevant device standard, e.g. Sheffield dummy head with insert or torso with insert (see Figures 2, 3 and 4). 7.2.3Pressure gauge, calibrated in the appropriate range and with a sensitivity better than 10 % of the limit value of
49、 breathing resistance specified in the relevant device standard. The response time of this pressure gauge, including the recording device, shall be less than 30 ms. for a response of 10 % to 90 % of the full scale deflection of the range used. 7.3 Procedure 7.3.1 General If ambient conditions differ from 23 C and 1 bar absolute, all flow rates shall be adjusted so that they give the correct flow rate when corrected to 23 C and 1 bar absolute. Ensure that the device has been pre-conditioned in accordance with the relevant device standard. Adjust th
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