1、CEN EN*:L38 94 W 3Li04589 008bb95 TT7 -I - BRITISH STANDARD 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
2、 614.894 73 U20 1 BS EN 138 : 1994 CEN ENUL38 94 m 3404589 0086696 933 m BS EN 138 : 1994 Standards Board and comes into 15 January 1995 0 BSI 1995 effect on Amd. No. Date The following BSI references relate to the work on this standard: Committee reference PSM/14 Draft for comment 89/37754 DC ISBN
3、O 580 2223 6 Cooperating organizations Text affected The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Belgium Denmark Finland France Germany Greece Iceland
4、 Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom Oesterreichisches Normungsinstitut Institut belge de normalisation Dansk Standard Suomen Standardisoimisliito, r. y. Association francaise de normalisation Deutsches Institut fr Normung e.V. Hellenic Organi
5、zation for Standardization Technological Institute of Iceland National Standards Authority of Ireland Ente Nazionale Italiano di Unificazione Inspection du Travail et des Mines Nederlands Normalisatie-instituut Norges Standardiseringsforbund Instituto Portugus da Qualidade Asociacin Espaola de Norma
6、lizacin y Certificacin Standardiseringskommissionen i Sverige Association suisse de normalisation British Standards Institution CEN ENxL38 94 3404589 008bb7 87T BS EN 138 : 1994 Contents we Cooperating organizations Inside front cover National foreword i Foreword 2 Specification Introduction 1 Scope
7、 3 3 2 Normative references 3 3 Definitions and nomenclature 3 4 Description 3 5 Classification 4 6 Requirements 4 7 Testing 7 8 Marking 18 9 Instructions for use 18 1 Classification of apparatus 4 2 Strength of breathing hose connections 4 3 Breathing resistance 7 Tbles 4 Esting schedule 8 Figures
8、1 Measurement of strength of couplings 9 2 Wooden blocks as used in pratica1 performance test 10 3 Schematic diagram of flammability test apparatus 12 4 Measurement of collapse of air supply hose 13 5 14 6 Arrangement to assess strength of air supply hose 14 7 Box for testing exhalation valve leakag
9、e 15 8 Measurement of exhalation valve leakage using a single cylinder breathing machine 16 9 Measurement of exhalation valve leakage using a twin cylinder breathing machine 17 National annexes NA (informative) Committees responsible Inside back cover NB (informative) Cross-references Inside back co
10、ver Arrangement of apparatus for assessment of resistance to kinking i CEN EN*L38 94 m 3404589 008bb98 70b m BS EN 138 : 1994 National foreword “his British Standard has been prepared under the direction of the Personal Safety Equipment Standards Policy Committee and is the English language version
11、of EN 138 : 1994 Respiratorg protective devices - Fresh air hose breathing apparatus for use with full face mask, half mask or mouthpiece assembly - Requirements, testing, marking, published by the European Committee for Standardization (CEN). Igether with BS EN 139, BS EN 269 and BS EN 270 it super
12、sedes BS 4667 : Part 3 : 1974, which is withdrawn. EN 138 was produced as a result of international discussions in which the United Kingdom took an active part. Compliance with a British Standard does not of itself confer immunity from legal obligations. CER EN*L38 94 3404589 0086699 642 EUROPEAN ST
13、ANDARD EN 138 NORME EUROPENNE EUROPISCHE NORM August 1994 UDC 614.894.73 : 620.1 Descriptors: Respiratory protective equipment, accident prevention, specifications, tests, marking English version Respiratory protective devices - Fresh air hose breathing apparatus for use with full face mask, half ma
14、sk or mouthpiece assembly - Requirements, testing, marking 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 Vollm
15、aske, Halbmaske oder Mundstckgarnitur - Anforderungen, Prfung, Kennzeichnung 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 s
16、tandard without any alteration. Up-to-date lists and bibliographical 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 othe
17、r language made by translation under the responsibility of a CEN 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, I
18、reland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, 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 O 1994 Copyright reserved to CEN
19、members Ref. No. EN 138 : 1994 E - CEN EN*138 Y W 3YOY589 0086700 194 W Page 2 EN 138 : 1994 Foreword This European Standard has been prepared by the Technical Committee CEN/TC 79, Respiratory protective devices, the Secretariat of which is held by DIN. This European Standard has been prepared under
20、 a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential 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
21、 by February 1995, and conflicting national standards shall be withdrawn at the latest by February 1995. According to the CENKENELEC Internal Regulations, the foliowing countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Irel
22、and, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. CEN ENuL38 94 3404589 008bOL O20 Introduction A given respiratory protective device can only be approved when the individual components satisfy the requirements of the test specification, which may be
23、a complete standard or part of a standard, and practical performance tests have been carried out on complete apparatus 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 characterist
24、ics and weight distribution are similar to those of the complete apparatus. 1 Scope This European Standard specifies 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 appa
25、ratus are covered, the differentiation resulting from mechanical performance and not respiratory protection. Escape 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 compl
26、iance with the requirements. 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, subse
27、quent 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 to applies. EN 132 : 1990 EN 134 : 1990 EN 136 : 1989 EN 140 : 1989 EN 142 : 1989
28、 EN 148-1 1987 Respiratory protective devices - Definitions Respiratory protective devices - Nomenclature of components Respiratory protective devices - Full face masks - Requirements, testing, marking Respiratory protective devices - Haw masks and quarter masks - Requirements, testing7 marking Resp
29、iratory protective devices - Mouthpiece assemblies - Requirements, testing7 marking Respiratory protective evices - Threads for fmepieces - Standard thread connection Page 3 EN 138 : 1994 EN 148-2 : 1987 Respiratory protective devices - Threads for facepieces - Centre thread connection Respiratory p
30、rotective devices - Threads for facepieces - Thread connection M 45 x 3 hose assemblies - Determination of electrical resistance (IS0 8031 : 1987) IS0 6941 : 19841 Extile fabrics - Burning AMD 1 : 1992 behaviour - Measurement of flame speed properties of vertically oriented specimens EN 148-3 EN 280
31、31 : 1993 Rubber and plastics hoses and 3 Definitions and nomenclature For the purposes of this European Standard the definitions and nomenclature given in EN 132 and EN 134 respectively apply together with the following. 3.1 fresh air hose breathing apparatus for use with a full face mask, half mas
32、k 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 overflow valve A non-return valve, fitted to the breathing hose, that is specifically designed to allow the excess air supply to
33、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 NOTE. The term suitable facepiece means a facepiece complying with EN 136, EN 140 or EN 142 as appropriate. 4.1 Fresh air hose breathin
34、g 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 or mouthpiece assembly. The exhaled air flows into the ambient atmosphere. This type of apparatus is class 2 only and cann
35、ot incorporate a half mask. 4.2 Fresh air hose breathing apparatus (manually assisted) This apparatus enables the wearer to be provided with breathable air which is forced through a low pressure air supply hose by a manually operated device (blower) to a suitable facepiece. In an emergency the weare
36、r is able to inhale whether or not the blower is operating. The exhaled and CEN EN*:L38 74 = 3404589 0086702 Tb 1 2 Page 4 EN 138: 1994 Light duty construction Heavy duty construction excess air flows into the ambient atmosphere. This type of apparatus can be class 1 or class 2. In certain circumsta
37、nces a breathing bag or similar device may be necessary. 4.3 Fresh air hose breathing apparatus (power operated) 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 other device such as a compressed a
38、ir 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 class 1 or class 2. In certain circumstances a breathing bag or similar device may be
39、necessary. 5 Classification and designation 5.1 Classification Apparatus shall be classified in terms of robustness of construction in accordance with table 1. I able 1. Classification of apparatus I class I Apparatus details I 6 Requirements 6.1 Materials 6. I. 1 All materials used in the construct
40、ion shall have adequate mechanical strength, durability and resistance to deterioration by heat. 6.1.2 Exposed parts, 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 metais as w
41、ill, on impact, give rise to frictional sparks capable of igniting flammable gas mixtures 6.1.3 Materials that may 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
42、 health. 6.1.4 The finish of any part of the apparatus likely to be in contact with the wearer shall be free from sharp edges and burrs. 6.1.5 Compliance with 6.1.1, 6.1.2, 6.1.3 and 6.1.4 shall be assessed in accordance with 7.2. 6.2 Water immersion The apparatus shall continue to function satisfac
43、torily after being submerged in water and shall meet the requirements of 6.19. WARNING. The apparatus is not designed for use under water. Testing in accordance with 7.3. 6.3 Cleaning and disinfecting The materials used shall withstand the cleaning and disinfection agents and procedures recommended
44、by the manufacturer. Rsting in accordance with 7.2. 6.4 Practical performance test The apparatus shall be such that it 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
45、 when in a crouched position or when working in a confined space. NUIT. These tests serve the purpose of checking the equipment 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 prac
46、tical performance tests show the apparatus has imperfections related to wearers acceptance, the test station shall describe the tests which revealed these imperfections. This will enable other test stations to duplicate the tests and assess the results thereof. %sting in accordance with 7.4. 6.5 Con
47、nectors 6.5.1 General 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 disconnect
48、ed during normal maintenance. Rsting in accordance with 7.2 and 7.4. 6.5.2 Couplings The apparatus shall be constructed so that any twisting of the breathing hose or fresh air supply hose does not affect the fit or performance of the apparatus, or cause either hose to become disconnected. The design
49、 of the coupling shall be such as to prevent unintentional interruption of the air supply. %sting in accordance with 7.2 and 7.4. CEN EN*L38 94 m 3404589 0086703 T3 m Face piece Full face mask Half mask Mouthpiece assembly 6.5.3 Strength of breathing hose connections When tested in accordance with 7.5 couplings of the breathing hose at the equipment connector and waist belt shall withstand the forces given in table 2. Class Force 1 50 2 2 50 1 50 1 50 2 250 N 6.6 Connection between apparatus and facepiece The connection between the breathing appa
