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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 341 : 1993 Implemen
2、ting Amendment No. 1, not published separately The European Standard EN 341 : 1992, with the incorporation of Amendment A1 : 1996, has the status of a British Standard ICS 13.340.99 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Personal protective equipment against falls fro
3、m a height Descender devices BS EN 341 : 1993Issue 2, March 1997 This British Standard, having been prepared under the direction of the Personal Safety Equipment Standards Policy, was published under the authority of the Standards Board and comes into effect on 15 February 1993 BSI 1997 The followin
4、g BSI references relate to the work on this standard: Committee reference PSM/5 Draft for comment 90/40696 DC ISBN 0 580 21108 8 Amendments issued since publication Amd. No.DateText affected 9423March 1997Indicated by a sideline in the margin Cooperating organizations The European Committee for Stan
5、dardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisl
6、iito, r.y. FranceAssociation franc aise de normalisation GermanyDeutsches Institut fu r Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspect
7、ion du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portugue s da Qualidade SpainAsociacio n Espan ola de Normalizacio n y Certificacio n SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalis
8、ation United KingdomBritish Standards Institution BS EN 341 : 1993 BSI 1997i | | Contents Page Cooperating organizationsInside front cover National forewordi Foreword2 Text of EN 3413 National annexes National annex NA (informative) Committees responsibleInside back cover National annex NB (informat
9、ive) Cross-referencesInside back cover National foreword This British Standard has been prepared under the direction of the Personal Safety Equipment Standards Policy Committee and is the English language version of EN 341 : 1992 Personal protective equipment against falls from a height Descender de
10、vices, including amendment A1 : 1996, published by the European Committee for Standardization (CEN). EN 341 was produced as a result of international discussions in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract
11、. 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 documdent comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, a
12、n inside back cover and a back cover. Sidelining in this document indicates the most recent changes by amendment. iiblank CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1992 Copy
13、right reserved to CEN members Ref. No. EN 341 : 1992 + A1 : 1996 E EUROPEAN STANDARDEN 341 NORME EUROPE ENNE December 1992 EUROPA ISCHE NORM + A1 October 1996 ICS 13.340.20 Descriptors: Personal protective equipment, accident prevention, protection against fall, rescue equipment,ropes,wirerope, clas
14、sifications, mechanical strength, tests,marking, instructions English version Personal protective equipment against falls from a height Descender devices (includes amendment A1 : 1996) Equipement de protection individuelle contre les chutes de hauteur Descenseurs (inclut lamendement A1 : 1996) Perso
15、 nliche Schutzausru stung gegen Absturz Abseilgera te (entha lt A nderung A1 : 1996) This European Standard was approved by CEN on 1992-11-30; amendment A1 was approved by CEN on 1996-09-19. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
16、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 Central Secretariat or to any CEN member. This European Standard exists in three official v
17、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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgiu
18、m, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2Issue 2, March 1997 EN 341 : 1992 BSI 1997 Foreword This European Standard was prepared by the Technical Committee CEN/TC 160 Protect
19、ion against falls from a height including working belts of which the secretariat is held by DIN. This European Standard has been prepared under a mandate given to CEN by the Commission of the European Communities and the European Free Trade Association, and supports essential requirements of the EC
20、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 June 1993, and conflicting national standards shall be withdrawn at the latest by June 1993. The standard was approved and in accordan
21、ce with the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Foreword of amen
22、dment A1 This Amendment EN 341 : 1992/A1 : 1996 to the EN 341 : 1992 has been prepared by Technical Committee CEN/TC 160, Protection against falls from height including working belts, the secretariat of which is held by DIN. This Amendment to the European Standard EN 341 : 1992 shall be given the st
23、atus of a national standard, either by publication of an identical text or by endorsement, at the latest by April 1997, and conflicting national standards shall be withdrawn at the latest by April 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the fo
24、llowing countries are bound to implement this Amendment: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Foreword2 1Scope3 2Normative references3 3Definitions
25、and classes3 4Requirements3 5Test methods4 6Marking and instructions for use5 Issue 2, March 1997Page 3 EN 341 : 1992 BSI 1997 | | | | | | | | | | | 1 Scope This standard specifies requirements, test methods, marking and instructions for use for descender devices as rescue equipment to be used in co
26、njunction with personal protective equipment against falls from a height, e.g. full body harnesses (see EN 361) or rescue equipment, e.g. rescue harnesses (see EN 1497). 2 Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These
27、 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 in it by amendment or revision. For undated
28、 references the latest edition of the publication referred to applies. EN 361Personal protective equipment against falls from a height Full body harnesses EN 364 : 1992Personal protective equipment against falls from a height Test methods EN 365Personal protective equipment against falls from a heig
29、ht General requirements for instructions for use and for marking prEN 795Protection against falls from a height Anchor devices Requirements and testing prEN 892-1Mountaineering ropes Ropes Safety requirements, testing, marking EN 1497Rescue equipment Rescue harnesses 3 Definition and classes 3.1 Def
30、inition For the purposes of this standard, the following definition applies. descender devices Rescue devices by means of which a person can, at a limited velocity, descend from a higher to a lower position either on his own or assisted by a second person. 3.2 Classes Descender devices shall be clas
31、sified as follows: class A:descent energy W $ 7,5 106J, class B:descent energy W $ 1,5 106J, class C:descent energy W $ 0,5 106J, class D:descent energy W $ 0,02 106J, for only one descent with a descent height of up to 20 m (for descender devices to be permitted for descent heights exceeding 20 m t
32、he descent energy shall be increased accordingly). NOTE 1. In practical operation descender devices are subjected to different loads. A descender device for descending e.g. 100 passengers from a ropeway cabin at a height of 100 m has to meet more severe requirements than a descender used by a crane
33、driver to descend himself from a height of 20 m. NOTE 2. Descender devices class D are primarily designed for private use. NOTE 3. Descent energy W = m3g3h3n W =descent energy, in joule; m =test mass, in kilogram; g=gravity 9,81 m/s2; h=descent height, in metres; n=number of descents. 4 Requirements
34、 4.1.1 Ropes, straps Ropes shall consist of synthetic fibres or steel wires 4.1.2 Wire ropes Wire ropes shall be made from galvanized steel wire; they shall be stress and torsion relieved. They shall be made from one piece. The nominal tensile strength of the steel wire rope should be 1770 N/mm2and
35、shall not exceed 1960 N/mm2. The base for calculating the construction shall be in any case 1770 N/mm2. Ropes shall be of a type capable of visual inspection or else subject to manufacturers guidance for appropriate examination and non-destructive test which will guarantee the rope is satisfactory f
36、or use. The rope terminations of wire ropes shall be made with thimbles and by splices or with thimbles and by ferrules. 4.1.3 Synthetic fibre ropes Synthetic fibre ropes shall be designed in a core-case plait and made from polyamide or a material of the same quality. The displacement of the case sh
37、all not exceed 15 mm over a rope length of 2 m. The elongation in use shall not exceed 8 %. Ropes of different design may be used for descender devices class D. 4.1.4 Straps If for the descent straps are used instead of ropes they shall be made of a material equal in quality to ropes made from synth
38、etic fibres. 4.1.5 Terminations Terminations shall exclusively be made by the manufacturer or by a person authorized by the manufacturer. Terminations shall be designed in a way that they can only be opened by means of a tool. They shall be marked by the manufacturer. Terminations of synthetic fibre
39、 ropes shall be made with knots or with pressed ferrules. The rope including terminations shall resist a static strength of 12 kN (class D 5 kN) for a period of 3 min. The test shall be carried out according to 5.5. Page 4Issue 2, March 1997 EN 341 : 1992 BSI 1997 | | 4.2 Holding load of hand operat
40、ed descender devices The maximum load necessary for holding the mass fixed at the end of the rope leaving the device shall be 120 N. 4.3 Static strength In a test of the static strength according to 5.5 no part of the device shall show any signs of breaking or tearing. 4.4 Descent energy With descen
41、ts being carried out in succession descender devices shall resist the descent energy determined for their class in the following without any impairment of the safety: descender devices class A:W $ 7,5 106J descender devices class B:W $ 1,5 106J descender devices class C:W $ 0,5 106J descender device
42、s class D:W $ 0,02 106J (for descender devices to be permitted for descent heights exceeding 20 m the descent energy shall be increased accordingly). After the test of the descent energy according to 5.6 and the functional test according to 5.7 the descender device and the rope or strap shall not sh
43、ow any changes affecting its safety. 4.5 Temperature rise of the descender device In the test of the descent energy according to 5.6 the temperature due to friction shall not rise to a point affecting the function of the descender device. None of the parts of the device touched during the descent sh
44、all develop a temperature higher than 48 C. 4.6 Descent velocity In the tests according to 5.6 and 5.7 it shall be possible to keep the descent velocity of the devices classes A, B and C between 0,5 m/s and 2 m/s. For the devices of class D it must be possible to maintain a descent velocity of a max
45、imum of 2 m/s. The testing of the descent velocity refers to the measurement of mean values. In the case of hand operated devices the velocity must not exceed 2 m/s after the control device was released. During the descent the descent velocity shall be almost constant. 4.7 Special requirements for d
46、evices class D Descender devices class D shall be designed in a way that they cannot be used more than once. 5 Test methods 5.1 Design test The design test is to show whether the device complies with the drawings and whether the calculation includes the proof of sufficient strength taking into accou
47、nt the forces given in 5.5. For proving the sufficient strength of components made from steel material a double safety with regard to the yield point shall be assumed. In case other materials are used there shall be an analogous proof concerning breaking or tensile strength. 5.2 Determination of cas
48、e displacement The case displacement shall be determined according to prEN 892-1. 5.3 Determination of the elongation in use The elongation in use shall be determined with two rope samples which shall not have been used before. The elongation in use shall be determined with the rope sample in a susp
49、ended position being loaded as follows: First a force created by a mass of (800,1) kg shall be rapidly applied to the rope sample. The mass shall be suspended freely at the rope sample. The load shall be maintained for (100,5) min. Then the force shall be reduced to zero and the rope sample shall remain unloaded in that position for (100,5) min. After that the rope sample shall be loaded with a mass of (50,1) kg, and it shall be marked by two reference lines in a distance of about 1 m. Then the distance l0 betwee