1、BRITISH STANDARD 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 1 3 2 74-3 :2 O0 1 B
2、S EN 13274-32001 Amd. No. National foreword Date Comments This 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 PH149, Test methods and interpretati
3、on, which has the responsibility to: - - 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 i
4、n 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 European publications referred to in this document may be found in the BSI Standards Catalogue under the section e
5、ntitled “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 necessary provisions of a contract. Users of British Standards are responsible for their correct application. Comp
6、liance 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 Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committ
7、ee on 07 November 2001 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 public
8、ation Q BSI 07 November 2001 ISBN O 580 38618 X 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 de
9、ssai - Partie 3: Dtermination de la resistance respiratoire Atemschuhgerte - 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 CENKENELEC Internal Regulations which stipulate the conditions fo
10、r 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 member. This European Standard exists in three official v
11、ersions (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 are the national standards bodies of Austria, Belgium.
12、 Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Noway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITI? EUROPEEN DE NORMALISATION EUROPISCHES KOMITEE FOR NORMUNG Management Centre: ru
13、e de Stassart, 36 B-1050 Brussels 0 2001 CEN All 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) Contents Page Foreword 3 In t rod LI c ti on . 4 I 2 3 4 5 6 6.1 6.2 6.3 6.3.1 6.3.2 6.3.3 7 7.1 7.2 7.3 7.
14、3.1 7.3.2 7.3.3 Annex A . 1 A.2 A.3 A.3.1 A.3.2 A.3.3 A.4 Scope 4 Normative references 4 Terms and definitions 4 Pre-requisites . 4 General test requirements 5 Principle 5 Equipment . 5 Procedure . 5 Ambient conditions . 5 Procedure for filters . 5 Procedure for other devices . 6 Method 2 : Dynamic
15、breathing resistance . 6 Principle 6 Equipment . 7 Procedure . 7 General 7 Inhalation resistance . 7 Exhalation resistance 7 Method 1: Static breathing resistance . 5 - A (normative) Fitting procedure for hoods which seal around the neck and which may or may not incorporate a head harness . 13 Intro
16、duction 13 Principle 13 Apparatus . 13 Sheffield dummy headltorso . 13 Adjustable collar 13 Procedure . 14 Stand and elastic string, for hoods which do not incorporate a head harness 13 Annex B (normative) Test results . Uncertainty of measurement 17 Annex ZA (informative) Clauses of this European S
17、tandard addressing essential requirements or other provisions of EU Directives 18 2 EN 13274-3:2001 (E) 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
18、 the status of a national standard, either by publication of an identical text or by endorsement, 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 Comm
19、ission 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. EN 13274-3 is one of several Parts, which are as follows: Part 1: Determination of inwa
20、rd 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 aerosol penetration of particle filters Par
21、t 8: Determination of dolomite dust clogging of particle filters The annexes A and B are normative. 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, Denma
22、rk, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 3 EN q3274-3:2001 (E) Introduction This European Standard is intended as i! supplement to the specific device standards for respiratory protect
23、ive 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 device standard. 1 Scope This European Standard specifies the general procedure for measurement of bre
24、athing resistance of filters for respiratory protective devices and respiratory protective devices 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 d
25、evice standard. 2 Normative references This European Standard 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 amend
26、ments 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 to applies (including amendments). EN 132, Respiratory protective devices - Definitions. 3
27、Terms and definitions For the purposes of this European Standard, the definitions given in EN 132 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 breathi
28、ng resistance inhalation resistance or exhalation resistance at defined constant flow expressed 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
29、flow expressed as a pressure difference measured between ambient and a specified point within the device 4 Pre-requisites In order to implement this European Standard, at least the following parameters shall be specified in the relevant device standard: - num ber of specimens; - specimen pre-conditi
30、oning; 4 EN 13274-32001 (E) - which test method (1 or 2); - mounting of the specimen; - preparation 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 Un
31、less 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 subject to a limit deviation of 2 5 %. Unless otherwise specified, the ambient temperature for testing shall
32、be between 16 “C and 32 “C and the temperature limits shall be subject to a limit deviation of 2 1 “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
33、The convention of reporting breathing 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 +.
34、 6.2 Equipment 6.2.1 of breathing resistance specified in the relevant device standard. Pressure gauge, calibrated in the appropriate range and with a sensitivity better than 10% of the limit value 6.2.2 Flowmeter(s) calibrated in the appropriate range. 6.2.3 Regulated blower/compressed air source o
35、r a variable suction device. 6.2.4 in the relevant device standard. Support for the device (e.g. filter holder, Sheffield dummy head with insert or torso with insert) as described 6.3 Procedure 6.3.1 Ambient conditions If ambient conditions differ from 23 “C and 1 bar absolute, all flow rates shall
36、be adjusted so that they give the correct flow rate when corrected to 23 “C and 1 bar absolute. 6.3.2 Procedure for filters Two methods of passing air through the filter are possible and typical examples are shown in Figures la) and Ib). The first method employs a chamber in which the filter holding
37、 device is fixed (see Figure la). Air is directed into 5 EN 13274-3:2001 (E) the chamber from a suitable 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 d
38、raws air through the filter holding device (see Figure 1 b) and the pressure drop is measured between ambient and a pressure pori 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 re
39、levant device standard and that an equipment connector or the holder intended by the manufacturer tc be used is available. Mount the filter in a leaktight manner for horizontal airflow as indicated in Figures la) or Ib). Pass the appropriate airflow through the filter holding system. Measure an6 rec
40、ord the pressure drop, APF, across the filter holding system Remove the filter. Pass the same airflow through the filter holding system. Measure and record the pressure drop, APH, of the Set-up. Report the breathing resistance of the filter at the flow rate as: 6.3.3 Procedure for other devices Ensu
41、re that the device has been pre-conditioned according to the relevant device standard. Fit the 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 show
42、n in Figure 3. See also Figure 4. For hoods fitting around the neck, the fitting procedure given in annex A (see Figure A.l) 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
43、ambient respectively. Note the “zero“ reading. Switch on and adjust the suction device to give 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 tub
44、e to a suitable blower and the pressure gauge connections to the pressure port and ambient respectively. 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 o
45、n the left side; e) lying on the right side; switch on and adjust the blower to give the appropriate 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 successi
46、vely placed in the other orientations. Report the highest value of the five results as the exhalation 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
47、 specified breathing minute volume. 6 EN 13274-32001 (E) NOTE The convention of reporting breathing 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 insi
48、de the facepiece is positive, the result is prefixed with a I+. 7.2 Equipment 7.2.1 7.2.2 insert (see Figures 2, 3 and 4). Breathing machine performing sinusoidal breathing. Support as described in the relevant device standard, e.g. Sheffield dummy head with insert or torso with 7.2.3 of breathing r
49、esistance 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. Pressure gauge, calibrated in the appropriate range and with a sensitivity better than 10 % of the limit value 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 p
