1、BRITISH STANDARD BS EN 818-7:2002Short link chain for lifting purposes Safety Part 7: Fine tolerance hoist chain, Grade T (Types T, DAT and DT)ICS 53.020.30; 77.140.65N O C O P Y I N G W I T H O U T B S I P E R M I S S I O N E X C E P T A S P E R M I T T E D B Y C O P Y R I G H T L A W+A1:2008BS EN
2、818-7:2002This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 19 March 2002 BSI 2009ISBN 978 0 580 60269 8National forewordThe UK participation in
3、its preparation was entrusted to Technical Committee MHE/1, Chains and fittings.A list of organizations represented on this committee can be obtained on request to its secretary.Amendments corrigenda issued since publication+A1 200: 8This British Standard is the UK implementation of EN 818-7:2002+A1
4、:2008. It supersedes BS EN 818-7:2002 which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by .a bCom
5、pliance with a British Standard cannot confer immunity from legal obligations. Date Comments 31 May 2009 Implementation of CEN amendment A1:2008A British Standard does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.EUROPEAN STANDA
6、RD NORME EUROPENNE EUROPISCHE NORM EN 818-7:2002+A1 April 2008 ICS 53.020.30 Supersedes EN 818-7:200English Version Short link chain for lifting purposes - Safety - Part 7: Fine tolerance hoist chain, Grade T (Types T, DAT and DT) Chanes de levage maillons courts - Scurit - Partie 7: Chanes de tolra
7、nce serre pour les palans, Classe T (Types T, DAT et DT) Kurzgliedrige Rundstahlketten fr Hebezwecke - Sicherheit Teil 7: Feintolerierte Hebezeugketten - Gteklasse T (Ausfhrung T, DAT und DT) This European Standard was approved by CEN on 8 November 2001 and includes Amendment 1 approved by CEN on 14
8、 February 2008. 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 bibliographical references concerning such national standards may
9、be obtained on application to the CEN Management Centre 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 member into its own language and notified to the CEN
10、 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, FranceGermany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands,
11、 Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in an
12、y form and by any means reserved worldwidefor CEN national Members. Ref. No. EN 818-7:2002+A1:2008: EN 818-7:2002+A1:2008 (E) 2 Contents page Foreword.3 Introduction 4 1 Scope4 2 Normative references .5 3 Terms and definitions.5 4 Hazards 6 5 Safety requirements7 6 Verification of safety requirement
13、s.14 7 Marking 18 8 Manufacturers certificate 18 9 Information for use and assembly of the hoist chain into the hoist18 Annex A (normative) Calculation of dimensions, working load limits and mechanical properties.20 Annex B (normative) Selection criteria for fine tolerance chain for power driven hoi
14、sts. Types T, DAT and DT22 Annex C (informative) Designation system for hoist chain - grade T 30 Annex D (informative) Approximate mass of Grade T hoist chain.31 Annex E (informative) Chain use 32 Annex ZA (informative) !Relationship between this European Standard and the Essential Requirements of E
15、U Directive 98/37/EC 33 Annex ZB (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC 34 Bibliography35 BS EN 818-7:2002+A1:2008 EN 818-7:2002+A1:2008 (E) 3 Foreword This document (EN 818-7:2002+A1:2008) has been prepared by Technical C
16、ommittee CEN/TC 168 “Chains, ropes, webbings, slings and accessories“, the secretariat of which is held by BSI. This document shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2008 and conflicting national standar
17、ds shall be withdrawn at the latest by October 2008. This document includes Amendment 1, approved by CEN on 2008-02-14. This document supersedes EN 818-7:2002. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! “. This document has been prepared under
18、a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directive(s). For relationship with EC Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document. The other parts of EN 818 are: Part
19、1: General conditions of acceptance Part 2: Medium tolerance chain for chain slings - Grade 8 Part 3: Medium tolerance chain for chain slings - Grade 4 Part 4: Chain slings - Grade 8 Part 5: Chain slings - Grade 4 Part 6: Chain slings - Specification for information for use and maintenance to be pro
20、vided by the manufacturer. The annexes A and B are normative. The annexes C, D, E, ZA and ZB are informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
21、Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 818-7:2002+A1:2008 EN 818-7:200
22、2+A1:2008 (E) 4 Introduction This European Standard has been prepared to be a harmonized standard to provide one means of conforming with the essential safety requirements of the Machinery Directive and associated EFTA regulations. These chains are intended for use in serial hoists. The multiple pit
23、ch is fine toleranced. The extent to which hazards are covered is indicated in the scope of this European Standard. In addition, lifting equipment should conform as appropriate to EN 292 for hazards which are not covered by this standard. Annex A is normative and gives the bases for the calculation
24、of the dimensions and the mechanical properties of hoist chains. Annex B is normative and gives selection criteria for the nominal size of hoist chains, Grade T, types T, DAT and DT for serial hoists. Annex C is informative and gives a designation system for recording the identifying features of fin
25、e tolerance short link chain Grade T. Since this system is not widely used it has been included in this first edition of this standard as an informative annex; however, should its use become more generally accepted then the status of the information would need to be reviewed. 1 Scope This European S
26、tandard specifies the requirements related to safety for hoist chain, Grade T (type T quenched and tempered and types DAT and DT case hardened), for use in serial chain hoists manual and power driven. Type DAT and type DT hoist chains possess surface hardnesses greater than core hardness and are use
27、d for power driven chain hoists to offer greater resistance to wear. Type DT hoist chain differs from DAT hoist chain in having higher surface hardness and/or greater case depth to optimise wear resistance. The standard is applicable to electrically welded round steel short link hoist chains conform
28、ing to EN 818-1. The range of nominal size of hoist chains covered by this European Standard is from 4 mm to 22 mm. The hazards covered by this European Standard are identified in clause 4. BS EN 818-7:2002+A1:2008EN 818-7:2002+A1:2008 (E) 5 2 Normative references This European Standard incorporates
29、, 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 amendments to or revisions of any of these publications apply to this European S
30、tandard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies (including amendments). EN 292-1:1991, Safety of machinery Basic concepts General principles for design Part 1: Basic terminology, methodology. EN 292-2:19
31、91/A1:1995, Safety of machinery Basic concepts General principles for design Part 2: Technical principles and specifications. EN 818-1:1996, Short link chain for lifting purposes Safety Part 1: General conditions of acceptance. EN 1050:1996, Safety of machinery Principles for risk assessment. EN ISO
32、 7500-1, Metallic materials - Verification of static uniaxial testing machines - Part 1: Tension/compression testing machines (ISO 7500-1:1999). EN 10025, Hot rolled products of non-alloy structural steels; technical delivery conditions (includes amendment A1:1993). ISO 643, Steels Micrographic dete
33、rmination of the ferritic or austenitic grain size. ISO 4301-1, Cranes and lifting appliances Classification Part 1: General. ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method. ISO 4965, Axial load fatigue testing machines - Dynamic force calibration - Strain gauge technique.
34、3 Terms and definitions For the purposes of this European Standard the terms, definitions and symbols given in EN 818-1 apply. BS EN 818-7:2002+A1:2008EN 818-7:2002+A1:2008 (E) 6 4 Hazards The release of a load due to failure of hoist chain puts at risk either directly or indirectly the safety or he
35、alth of those persons within the danger zone of lifting equipment. In order to provide the necessary strength and durability of hoist chain, this European Standard lays down requirements for the design, selection of materials of construction and testing to ensure that specified levels of performance
36、 are met. Fatigue failure has not been identified as a hazard for type T chain when hoist chain selected according to annex B and having the specified levels of performance and design given in this European Standard is used in serial hoists. Fatigue failure has been identified as a hazard for hoist
37、chains types DAT and DT used in power driven hoists. Therefore this European Standard specifies levels of design and performance, with particular reference to fatigue resistance. Since failure can be caused by the incorrect choice of grades and specification of lifting hoist chain this European Stan
38、dard also gives the requirements for marking and the manufacturers certificate. Dimensional incompatibility between the hoist chain and mating parts of the hoist (chain wheel, chain guide and loading device) may lead to premature failure and this European Standard contains dimensional requirements f
39、or correct assembly and fit. Table 1 lists those hazards, which require action to reduce risk identified by risk assessment as being specific and significant for hoist chain of Grade T Types T, DAT, DT. Table 1 Hazards and associated requirements Hazards identified in annex A of EN 1050:1996 Relevan
40、t clause of annex A of EN 292-2:1991/A1:1995 Relevant clause/subclause of this standard 1.e Mechanical hazard due to 1.3.2 5 inadequacy of strength 4.1.2.3 4.1.2.4 4.2.4 6 1.7.3 4.3.1 7 1.5 (Types DAT, DT only) - 5.5.6 Fatigue failure and 6.2.7 BS EN 818-7:2002+A1:2008EN 818-7:2002+A1:2008 (E) 7 5 S
41、afety requirements 5.1 General The hoist chains shall conform to the requirements of EN 818-1. 5.2 Dimensions 5.2.1 General A selection of nominal sizes and dimensions is given in 5.2.2 and 5.2.4. Other nominal sizes may be used, provided that nominal sizes shall not exceed the range specified in 5.
42、2.2 and that the dimensions and tolerances are calculated in accordance with annex A. Whilst the nominal link pitch pnis based upon 3 dn(where dnis the nominal size of the hoist chains) this may be varied but shall not exceed the limits 2,6 dnto 3,2 dn. The nominal link pitch pnshall be subject to t
43、he tolerances specified in annex A. NOTE Compatibility between the hoist chain and the mating parts of the hoist requires agreement on the nominal size and dimensions and on the distribution of tolerances between the chain manufacturer and the hoist manufacturer. 5.2.2 Nominal size dnThe nominal siz
44、e shall not be below 4 mm or above 22 mm, a selection of nominal sizes is listed in Table 2. 5.2.3 Tolerances on material diameter The tolerances on material diameter for the selected nominal sizes shall be as listed in Table 2. These and all other nominal size material diameter tolerances shall be
45、calculated in accordance with A.1. 5.2.4 Pitch and widths The dimensions and tolerances of the 3 dnpitch and the width for the selected nominal sizes shall be as listed in Table 2. The dimensions and tolerances of the pitch and width shall be calculated in accordance with A.1. These dimensions and t
46、olerances and all other nominal size and pitch ranges and tolerances of multiple pitch lengths, shall be calculated in accordance with A.1. The tolerances of multiple pitch lengths shall be calculated in accordance with A.1. BS EN 818-7:2002+A1:2008EN 818-7:2002+A1:2008 (E) 8 Table 2 Selected dimens
47、ions Dimensions in millimetres Pitch Width Gauge length of Weld 11 x pndiameter Nominal Material tolerance1 internal external tolerance1) dssize diameter w3 w2dntolerance pnmin. max. max.4 0,2 12 0,25 4,8 13,6 132 0,6 4,3 5 0,2 15 0,3 6,0 17,0 165 0,8 5,4 6 0,2 18 0,35 7,2 20,4 198 1,0 6,5 7 0,3 21
48、0,4 8,4 23,8 231 1,1 7,6 8 0,3 24 0,5 9,6 27,2 264 1,3 8,6 9 0,4 27 0,5 10,8 30,6 297 1,4 9,7 10 0,4 30 0,6 12,0 34,0 330 1,6 10,8 11 0,4 33 0,6 13,2 37,4 363 1,7 11,9 12 0,5 36 0,7 14,4 40,8 396 1,9 13,0 13 0,5 39 0,8 15,6 44,2 429 2,1 14,0 14 0,6 42 0,8 16,8 47,6 462 2,2 15,1 16 0,6 48 0,9 19,2 54
49、,4 528 2,5 17,3 18 0,9 54 1,0 21,6 61,2 594 2,9 19,4 20 1,0 60 1,2 24,0 68,0 660 3,2 21,6 22 1,1 66 1,3 26,4 74,8 726 3,5 23,8 1) These tolerances are usually divided into + 2/3 and 1/3 for both the individual link and the standard gauge length. 5.2.5 Weld diameter The maximum diameter at the weld for the selected nominal sizes shall be as in Table 2 and shall be calculated in accordance with annex A. The maximum diameter at the weld shall not be in excess of 8 % above the nominal si
