1、BRITISH STANDARD BS EN 138:1994 Respiratory protective devices Fresh air hose breathing apparatus for use with full face mask, half mask or mouthpiece assembly Requirements, testing, marking The European Standard EN 138:1994 has the status of a British Standard UDC 614.894.73:620.1BS EN138:1994 This
2、 British Standard, having been prepared under the direction of the Personal Safety Equipment Standards Policy Committee, was published under the authority of the StandardsBoard and comesintoeffect on 15 January 1995 BSI 07-1999 The following BSI references relate to the work on this standard: Commit
3、tee reference PSM/14 Draft for comment 89/37754 DC ISBN 0 580 22230 6 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreic
4、hisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standard Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute o
5、f Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola d
6、e Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN138:1994 BSI 07-1999 i Contents Page Cooperating organizations Inside
7、 front cover National foreword ii Foreword 2 Introduction 3 1 Scope 3 2 Normative references 3 3 Definitions and nomenclature 3 4 Description 3 5 Classification 4 6 Requirements 4 7 Testing 8 8 Marking 18 9 Instructions for use 18 National annex NA (informative) Committees responsible 20 National an
8、nex NB (informative) Cross-references Inside back cover Figure 1 Measurement of strength of couplings 10 Figure 2 Wooden blocks as used in pratical performance test 11 Figure 3 Schematic diagram of flammability test apparatus 13 Figure 4 Measurement of collapse of air supply hose 14 Figure 5 Arrange
9、ment of apparatus for assessment of resistance to kinking 14 Figure 6 Arrangement to assess strength of air supply hose 15 Figure 7 Box for testing exhalation valve leakage 16 Figure 8 Measurement of exhalation valve leakage using a single cylinder breathing machine 17 Figure 9 Measurement of exhala
10、tion valve leakage using a twin cylinder breathing machine 18 Table 1 Classification of apparatus 4 Table 2 Strength of breathing hose connections 5 Table 3 Breathing resistance 7 Table 4 Testing schedule 9BS EN138:1994 ii BSI 07-1999 National foreword This British Standard has been prepared under t
11、he direction of the Personal Safety Equipment Standards Policy Committee and is the English language version of EN138:1994 Respiratory protective devices Fresh air hose breathing apparatus for use with full face mask, half mask or mouthpiece assembly Requirements, testing, marking, published by the
12、European Committee for Standardization (CEN). Together with BSEN139, BSEN269 and BSEN270 it supersedes BS4667-3:1974, which is withdrawn. EN 138 was produced as a result of international discussions in which the UnitedKingdom took an active part. A British Standard does not purport to include all th
13、e 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 immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii,
14、 the EN title page, pages 2 to 20, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 138 Augu
15、st 1994 UDC 614.894.73:620.1 Descriptors: Respiratory protective equipment, accident prevention, specifications, tests, marking Englishversion Respiratory protective devices Fresh air hose breathing apparatus for use with full face mask, half mask or mouthpiece assembly Requirements, testing, markin
16、g Appareils de protection respiratoire Appareils de protection respiratoire air libre avec masque complet, demi-masque ou ensemble embout buccal Exigences, essais, marquage Atemschutzgerte Frischluft-Schlauchgerte in Verbindung mit Vollmaske, Halbmaske oder Mundstckgarnitur Anforderungen, Prfung, Ke
17、nnzeichnung This European Standard was approved by CEN on 1994-08-17. CEN members are bound to comply with the CEN/CENELEC 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 bibliographi
18、cal references concerning such national standards may be obtained on application to the Central Secretariat 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 the responsibility of a CEN
19、member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain,
20、Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1994 Copyright reserved to CEN members Ref. No. EN 138:1994 EEN138:1994 BSI 07-1999 2 Foreword Thi
21、s European Standard has been prepared by the Technical Committee CEN/TC79, Respiratory protective devices, the Secretariat of which is held by DIN. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports e
22、ssential requirements of the EC Directive(s). 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 February1995, and conflicting national standards shall be withdrawn at the latest by February1995. Acc
23、ording to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom.EN138:199
24、4 BSI 07-1999 3 Introduction A given respiratory protective device can only be approved when the individual components satisfy the requirements of the test specification, which may be a complete standard or part of a standard, and practical performance tests have been carried out on complete apparat
25、us where specified in the appropriate standard. If for any reason a complete apparatus is not tested then simulation of the apparatus is permitted provided the respiratory characteristics and weight distribution are similar to those of the complete apparatus. 1 Scope This European Standard specifies
26、 minimum requirements for fresh air hose breathing apparatus for use with a full face mask, a half mask or a mouthpiece assembly as a respiratory protective device. Two classes of apparatus are covered, the differentiation resulting from mechanical performance and not respiratory protection. Escape
27、and diving apparatus and that used in abrasive blasting operations are not covered by this standard. Laboratory and practical performance tests are included for the assessment of compliance with the requirements. 2 Normative references This European Standard incorporates by dated or undated referenc
28、e, 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 incorporated
29、 in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 132:1990, Respiratory protective devices Definitions. EN 134:1990, Respiratory protective devices Nomenclature of components. EN 136:1989, Respiratory protective devices Full face ma
30、sks Requirements, testing, marking. EN 140:1989, Respiratory protective devices Half masks and quarter masks Requirements, testing, marking. EN 142:1989, Respiratory protective devices Mouthpiece assemblies Requirements, testing, marking. EN 148-1:1987, Respiratory protective devices Threads for fac
31、epieces Standard thread connection. EN 148-2:1987, Respiratory protective devices Threads for facepieces Centre thread connection. EN 148-3, Respiratory protective devices Threads for facepieces Thread connection M 45 3. EN 28031:1993, Rubber and plastics hoses and hose assemblies Determination of e
32、lectrical resistance. (ISO 8031:1987) ISO 6941:1984/AMD 1:1992, Textile fabrics Burning behaviour Measurement of flame speed properties of vertically oriented specimens. 3 Definitions and nomenclature For the purposes of this European Standard the definitions and nomenclature given in EN132 and EN13
33、4 respectively apply together with the following. 3.1 fresh air hose breathing apparatus for use with a full face mask, half mask or a mouthpiece assembly apparatus which is not self-contained in which breathable fresh air is drawn from an air source with or without the assistance of a device 3.2 ov
34、erflow valve a non-return valve, fitted to the breathing hose, that is specifically designed to allow the excess air supply to escape to atmosphere 3.3 breathing bag a device which compensates for variation in the air supply and provides for peak inhalation flow requirements 4 Description NOTEThe te
35、rm “suitable facepiece” means a facepiece complying with EN136, EN140 or EN142 as appropriate. 4.1 Fresh air hose breathing apparatus (unassisted) This apparatus enables the wearer to be provided with breathable air supplied by his own breathing action through an air supply hose to a full face mask
36、or mouthpiece assembly. The exhaled air flows into the ambient atmosphere. This type of apparatus is class2only and cannot incorporate a half mask.EN138:1994 4 BSI 07-1999 4.2 Fresh air hose breathing apparatus (manually assisted) This apparatus enables the wearer to be provided with breathable air
37、which is forced through a low pressure air supply hose by a manually operated device (blower) to a suitable facepiece. In an emergency the wearer is able to inhale whether or not the blower is operating. The exhaled and excess air flows into the ambient atmosphere. This type of apparatus can be clas
38、s1or class2. In certain circumstances a breathing bag or similar device may be necessary. 4.3 Fresh air hose breathing apparatus (poweroperated) This apparatus enables the wearer to be provided with breathable air which is forced through a low pressure air supply hose by a motor driven blower or oth
39、er device such as a compressed air injector to a suitable facepiece. In an emergency the wearer is able to inhale whether or not the device is operating. The exhaled and excess air flows into the ambient atmosphere. This type of apparatus can be class1orclass2. In certain circumstances a breathing b
40、ag or similar device may be necessary. 5 Classification and designation 5.1 Classification Apparatus shall be classified in terms of robustness of construction in accordance withTable 1. Table 1 Classification of apparatus 5.2 Designation Respiratory protective devices meeting the requirements of th
41、is standard shall be designated as follows: Fresh air BA EN 138 (class)(options) Example: Fresh air BAEN138 class2 6 Requirements 6.1 Materials 6.1.1 All materials used in the construction shall have adequate mechanical strength, durability and resistance to deterioration by heat. 6.1.2 Exposed part
42、s, i.e. those which may be subjected to impact during use of the apparatus shall not be made of aluminium, magnesium, titanium or alloys containing such proportions of these metals as will, on impact, give rise to frictional sparks capable of igniting flammable gas mixtures 6.1.3 Materials that may
43、come into direct contact with the wearers skin or that may affect the quality of the breathed air shall not be known to be likely to cause skin irritation or any other adverse effect to health. 6.1.4 The finish of any part of the apparatus likely to be in contact with the wearer shall be free from s
44、harp edges and burrs. 6.1.5 Compliance with 6.1.1, 6.1.2, 6.1.3 and6.1.4 shall be assessed in accordance with7.2. 6.2 Water immersion The apparatus shall continue to function satisfactorily after being submerged in water and shall meet the requirements of6.19. WARNING. The apparatus is not designed
45、for use under water. Testing in accordance with7.3. 6.3 Cleaning and disinfecting The materials used shall withstand the cleaning and disinfection agents and procedures recommended by the manufacturer. Testing in accordance with7.2. 6.4 Practical performance test The apparatus shall be such that it
46、can be worn without avoidable discomfort, the wearers shall show no undue signs of strain attributable to wearing the apparatus, and it shall impede the wearer as little as possible when in a crouched position or when working in a confined space. NOTEThese tests serve the purpose of checking the equ
47、ipment for imperfections that cannot be determined by the tests described elsewhere in this standard. Where in the opinion of the test station approval is not granted because practical performance tests show the apparatus has imperfections related to wearers acceptance, the test station shall descri
48、be the tests which revealed these imperfections. This will enable other test stations to duplicate the tests and assess the results thereof. Testing in accordance with7.4. Class Apparatus details 1 Light duty construction 2 Heavy duty constructionEN138:1994 BSI 07-1999 5 6.5 Connectors 6.5.1 General
49、 Components of the apparatus shall be readily separated for cleaning, examining and testing. All demountable connections shall be readily connected and secured, where possible by hand. Any means of sealing shall be retained in position when the joints or couplings are disconnected during normal maintenance. Testing in accordance with7.2 and7.4. 6.5.2 Couplings The apparatus shall be constructed so that any twisting of the breathing hose or fresh air supply hose does not affe
