1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 381-8 : 1997 The Eu
2、ropean Standard EN 381-8 : 1997 has the status of a British Standard ICS 13.340.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Protective clothing for users of hand-held chain saws Part 8. Test methods for chain saw protective gaitersBS EN 381-8 : 1997 This British Standar
3、d, having been prepared under the direction of the Health and Environment Sector Board, was published under the authority of the Standards Board and comes into effect on 15 September 1997 BSI 1997 The following BSI references relate to the work on this standard: Committee reference PH/3/5 Draft for
4、comment 91/44708 DC ISBN 0 580 28321 6 Amendments issued since publication Amd. No. Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee PH/3, Protective clothing, to Subcommittee PH/3/5, Clothing for protec
5、tion against chainsaws, upon which the following bodies were represented: Arboricultural Association Association of Professional Foresters British Chainsaw Association British Clothing Industry Association British Railways Board British Safety Industry Federation Building Employers Confederation Con
6、sumer Policy Committee of BSI Forestry and Arboriculture Safety and Training Council Forestry Commission Garden Machinery Association Health and Safety Executive Hire Association Europe Made-up Textiles Association National Association of Glove Manufacturers National Farmers Union Royal Society for
7、the Prevention of Accidents SATRA Footwear Technology Centre Safety Equipment Association Safety Equipment Distributors Association Timber Growers AssociationBS EN 381-8 : 1997 BSI 1997 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 381-8 3ii BSI
8、 1997 BS EN 381-8 : 1997 National foreword This Part of BS EN 381 has been prepared by Subcommittee PH/3/5, and is the English language version of EN 381-8 : 1997, published by the European Committee for Standardization (CEN). The UK participation in its preparation was entrusted to Technical Commit
9、tee PH/3, Protective clothing, 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 development
10、s and promulgate them in the UK. 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 Correspondence Index, or by using the Find facili
11、ty of the BSI Standards Electronic Catalogue. 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, the EN title page, pages 2 to 12, an inside back cover and a back
12、 cover.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 1997 All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 381-8
13、: 1997 E EUROPEAN STANDARD EN 381-8 NORME EUROPE ENNE EUROPA ISCHE NORM April 1997 ICS 13.340.10 Descriptors: Personal protective equipment, accident prevention, safety, chain saws, protective clothing, legs, tests, cutting, notch strength English version Protective clothing for users of hand-held c
14、hain saws Part 8: Test methods for chain saw protective gaiters Ve tements de protection pour utilisateurs de scies a chaine tenues a la main Partie 8: Me thodes dessai des gue tres de protection pour lutilisation de scies a chaine Schutzkleidung fu r Benutzer handgefu hrter Kettensa gen Teil 8: Pru
15、 fverfahren fu r Schutzgamaschen fu r Kettensa gen This European Standard was approved by CEN on 1997-02-13. 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 altera
16、tion. 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 other language made by transla
17、tion 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, Ireland, Italy, Luxembourg,
18、 Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 381-8 : 1997 BSI 1997 Foreword This European Standard has been prepared by the Technical Committee CEN/TC 162, Protective clothing including hand and arm protection and lifejackets, the secretariat of which is he
19、ld by DIN. 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 October 1997, and conflicting national standards shall be withdrawn at the latest by October 1997. EN 381 Protective clothing for users o
20、f hand held chainsaws includes the following Parts: Part 1: Test rig for testing resistance to cutting by a chain saw Part 2: Test rig for leg protection Part 3: Test methods for footwear Part 4: Test method for chainsaw protective gloves Part 5: Requirements for leg protection Part 7: Requirements
21、for chainsaw protective gloves Part 8: Test methods for chainsaw protective gaiters Part 9: Requirements for chainsaw protective gaiters 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 re
22、quirements of EU Directive(s). For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this European Standard. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European
23、 Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 0 Introduction 3 1 Scope 3 2 Normative references 3 3 Definition 3 3.1 Gaiter 3 4 Pr
24、e-treatment 3 5 Testing of chain saw resistance 4 5.1 Principle 4 5.2 Test specimens 4 5.3 Apparatus 4 5.3.1 Test rig 4 5.3.2 Mounting device for gaiter 4 5.4 Test procedure 4 5.4.1 General 4 5.4.2 Mounting of gaiter on artificial boot 4 5.4.3 Cutting 7 6 Testing the strength of the underfoot straps
25、 10 6.1 Principle 10 6.2 Test specimens 10 6.3 Apparatus 10 6.3.1 Left and right artificial boots 10 6.3.2 Tensile testing machine (or other means of applying a known variable force) 10 6.3.3 Mounting device 10 6.3.4 Hook for applying load to straps 10 6.4 Test method for underfoot straps 10 6.4.1 M
26、ounting of samples for testing 10 6.4.2 Application of load to straps 10 7 Test report 10 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives 11Page 3 EN 381-8 : 1997 BSI 1997 0 Introduction This European Standard forms part
27、 of a series concerned with personal protective equipment designed to protect against the risks arising from the use of hand-held chain saws. No personal protective equipment can ensure 100 % protection against cutting from a hand-held chain saw. Nevertheless, experience has shown that it is possibl
28、e to design personal protective equipment which offers a certain degree of protection. Different functional principles may be applied in order to give protection. These include: a) chain slipping: on contact the chain does not cut the material; b) clogging: fibres are drawn by the chain into the dri
29、ve sprocket and block chain movement; c) chain braking: fibres have a high resistance to cutting and absorb rotational energy, thereby reducing the chain speed. Often more than one principle is applied. 1 Scope This European Standard specifies the test methods to be used to assess the resistance of
30、gaiters to cutting by hand-held chain saws. A test method of assessing the strength of underfoot straps of gaiters is also included. This European Standard is applicable to gaiters used together with safety footwear according to EN 345 : 1992 and EN 345 : 1992/A1 with a metallic toecap, because gait
31、ers offer only partial protection against chain saw cutting. Gaiters according to this European Standard are not intended for use in situations where there is a significant risk of tripping such as tree climbing or in forests. The requirements associated with the test methods in this European Standa
32、rd are given in EN 381-9. 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, subsequ
33、ent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendments or revision. For undated references the latest edition of the publication referred to applies. EN 345 : 1992, EN 345 : 1992/A1 Specification for safety footwear for
34、professional use EN 381-1 : 1993 Protective clothing for users of hand-held chain saws Part 1: Test rig for testing resistance to cutting by a chain saw EN 381-3 Protective clothing for users of hand-held chain saws Part 3: Test methods for footwear EN 381-9 : 1997 Protective clothing for users of h
35、and-held chain saws Part 9: Requirements for chain saw protective gaiters lSO 868 Plastics and ebonite Determination of indentation hardness by means of a durometer (Shore hardness) ISO 3175 : 1995 Textiles Evaluation of stability to machine dry-cleaning EN ISO 6330 Textiles Domestic washing and dry
36、ing procedures for textile testing (ISO 6330 : 1984) 3 Definition For the purposes of this European Standard the following definition applies. 3.1 gaiter A removable covering intended to protect the front part of the foot, ankle and lower leg against cutting by a hand-held chain saw. 4 Pre-treatment
37、 Except in the specific cases detailed below, all the test specimens shall be washed and dried 5 times before testing. This washing shall be according to EN ISO 6330 procedure 2A, and the drying by tumble-drying at a temperature not exceeding 70 C (procedure E).Page 4 EN 381-8 : 1997 BSI 1997 1) Sui
38、table artificial boots are obtainable from SATRA Footwear Technology Centre, Kettering, Northants, United Kingdom. This information is given for the convenience of users of this European Standard and does not constitute an endorsement by CEN of the product. Equivalent products may be used if they ca
39、n be shown to lead to the same results. Exceptions to this treatment are permitted in the following cases: a) where the gaiters are marked as unsuitable for washing or dry-cleaning; In such cases, the gaiters shall be immersed in water (20 C) for 10 min and then allowed to line-dry until more than 9
40、5 % of the water has evaporated, measured by weight. b) where the gaiters are marked as unsuitable for washing, but suitable for dry-cleaning; In such cases, the test specimens shall be dry-cleaned 3 times before testing. The dry-cleaning shall be performed principally in accordance with the conditi
41、ons described in 9.1 of ISO 3175 : 1995, i.e. using conditioned specimens, perchloroethylene with surfactant, addition of emulsified water, cleaning for 15 min at (30 3) C, draining and extracting, rinsing for 5 min with pure solvent, and draining and final extraction. Tumble dry with an outlet temp
42、erature not exceeding 60 C. No restorative finishing procedure. c) where the gaiters are marked as suitable for both washing and dry-cleaning; In such cases, the test shall be carried out on both washed specimens and dry-cleaned specimens, (2 sets of specimens) or, at the request of the manufacturer
43、, on one set of specimens first dry-cleaned and then washed. d) where the gaiters are marked as unsuitable for tumble-drying; In such cases, the specimens shall be washed by the method described above, then line-dried until more than 95 % of the water has evaporated, measured by weight. 5 Testing of
44、 chain saw resistance 5.1 Principle Each gaiter is mounted on an artificial boot and its chain saw resistance is then assessed by applying a moving chain of known speed and inertia characteristics and determining whether or not the chain cuts through. NOTE. For the purpose of testing gaiters it is r
45、ecommended that the test rig is fitted with some means of limiting the depth of cut into the artificial boot in cases where the gaiter fails to resist the chain. 5.2 Test specimens Three pairs of gaiters are required for each pre-treatment method applied. All the specimens shall be of a size suitabl
46、e for wear over a Paris point (stitch) size 42 boot (UK size 8). 5.3 Apparatus 5.3.1 Test rig Test rig as described in EN 381-1. 5.3.2 Mounting device for gaiter 5.3.2.1 Left and right artificial boots These are moulded from a rigid polyurethane. 1) Density 1,13 10 3 kgm 23 Hardness 95 Shore A Deter
47、mination of indentation hardness according to ISO 868. Their shape and dimensions are shown in figures 1, 2 and 3. Figures 1, 2 and 3 show a left boot. Right boots have the same dimensions, but their cross-sectional shapes are mirror images of those shown. In addition the boots shall be covered with
48、 a layer of (1,6 0,1) mm full-chrome side upper leather. The area covered by the leather shall correspond at least to the specified protective area described in 4.2 of EN 381-9 : 1997. 5.3.2.2 Base for mounting artificial boots The same base as used for mounting normal boots, described in EN 381-3.
49、5.4 Test procedure 5.4.1 General Calibration procedures are as in EN 381-1. After calibration the following changes are introduced. a) The chain saw unit is arranged as in Part 1 of this standard, but the load shall be (30 0,5) N instead of 15 N (see 5.3.5 in EN 381-1 : 1993). b) The horizontal distance from the point of contact to the centre of the sprocket shall be (300 2) mm (see figure 3 in EN 381-1 : 1993). 5.4.2 Mounting of gaiter on artificial boot Attach the gaiter securely to the appropriat
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