1、BRITISH STANDARD BS EN 818-2:Short link chain for lifting purposes Safety Part 2: Medium tolerance chain for chain slings Grade 8ICS 53.020.30nullnull nullnullnullnullnullnullnull nullnullnullnullnullnullnull nullnullnull nullnullnullnullnullnullnullnullnullnull nullnullnullnullnullnull nullnull nul
2、lnullnullnullnullnullnullnullnull nullnull nullnullnullnullnullnullnullnullnull nullnullnull1996+A1:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/03/2009 07:46, Uncontrolled Copy, (c) BSIBS EN 818-2:1996+A1:2008This British Standard was published under the authority of the Standards
3、Board and comes into effect on 15 April 1997 BSI 2008ISBN 978 0580 64140 4National forewordThis British Standard is the UK implementationofEN 818-2:1996+A1:2008. Itsupersedes BS EN 818-2:1996 which is withdrawn.The start and finish of textintroduced or altered by amendment is indicated in the text b
4、y tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 isindicated by!“.The UK participation in its preparation was entrusted to Technical Committee MHE/1, Chains and fittings.A list of organizations represented on this commit
5、tee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued sin
6、ce publicationDate Comments30 November 2008 Implementation of CEN amendment A1:2008, andalignment of BSI and CEN publication datesLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/03/2009 07:46, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORMEN 818-2:1996+A1April
7、2008 ICS 53.020.30Supersedes EN 818-2:1996 English Version Short link chain for lifting purposes - Safety - Part 2: Medium tolerance chain for chain slings - Grade 8 Chanes de levage maillons courts - Scurit - Partie 2:Chane de tolrance moyenne pour lingues en chanes - Classe 8Kurzgliedrige Rundstah
8、lketten fr Hebezwecke - Sicherheit-Teil 2: Mitteltolerierte Rundstahlketten fr Anschlagketten - Gteklasse 8This European Standard was approved by CEN on 7 March 1996 and includes Amendment 1 approved by CEN on 10 February 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations
9、 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 nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European
10、 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 Management Centre has the same status as the official versions.CEN members are the nationa
11、l standards bodies of Austria, Belgium, Bulgaria, 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 Unite
12、d Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.Ref. No. EN 818-2:1996+A1:2
13、008: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/03/2009 07:46, Uncontrolled Copy, (c) BSIEN 818-2:1996+A1:2008 (E)2 Contents PageForeword3Introduction.41Scope52Normative references53 ! Terms and definitions“ .54Hazards.65Safety requirements 65.1General65.2Dimensions.65.2.1 Nominal si
14、ze of chain, dn 65.2.2Tolerance on material diameter (except at the weld).65.2.3Weld diameter75.2.4 Length dimensionally affected by welding.75.2.5 Pitch and widths 75.3 Materials and heat treatment85.3.1 Quality of material85.3.2 Heat treatment95.4 Mechanical properties.95.4.1Manufacturing proof fo
15、rce (MPF).95.4.2 Breaking force (BF) and total ultimate elongation (A).95.4.3 Bend deflection96Verification of safety requirements106.1 ! Qualification of personnel.106.2 Size of lot and selection of samples106.3Manufacturing proof force, breaking force and total ultimate elongation.106.3.1 Static t
16、ensile test .106.3.2 Manufacturing proof force acceptance criteria116.3.3 Breaking force and total ultimate elongation acceptance criteria116.4 Bend deflection116.4.1 Bend test.116.4.2 Bend deflection acceptance criteria117Marking.118Manufacturers certificate.119 ! Information“ for use .11Annex A (i
17、nformative) Calculation of dimensions, working load limits and mechanical properties .13A.1Dimensions and tolerances13A.2Working load limits and mechanical properties.13Annex B (informative) Weight of chain .15Annex C (informative) Designation system for chain (medium tolerance) - grade 8.16Annex ZA
18、 (informative) ! Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC17Annex ZB (informative) Relationship between this European Standard and the EssentialRequirements of EU Directive 2006/42/EC18! Bibliography.19BS EN 818-2:1996+A1:2008Licensed Copy: W
19、ang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/03/2009 07:46, Uncontrolled Copy, (c) BSIEN 818-2:1996+A1:2008 (E)3 Foreword This document (EN 818-2:1996+A1:2008) has been prepared by Technical Committee CEN/TC168 “Chains,ropes, webbing, slings and accessories - Safety”,the secretariat of which is held by
20、BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latestby October 2008 and conflicting national standards shall be withdrawn at the latest byOctober2008.This document includes Amendment 1, approved byCE
21、N on 2008-02-10. This document supersedes EN 818-2:1996. The start and finish of textintroduced or altered by amendment is indicated in the text by tags!“. ! This document has been prepared under a mandate given to CEN bythe European Commission and the European Free Trade Association, and supports e
22、ssential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document.“The other parts of EN 818 are: Part 1: General conditions of acceptance Part 3: Medium tolerance chain for chain slings - Grade 4 Part 4: Cha
23、in slings - Grade 8 Part 5: Chain slings - Grade 4 ! Part 6: Chain slings - Specification for information for use and maintenance to be provided by the manufacturer“ ! Part 7: Fine tolerance hoist chain, Grade T (Types T, DAT and DT)“A further part or parts will cover fine tolerance chains for chain
24、 hoists and other lifting appliances. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, CzechRepublic, Denmark, Estonia, Finland, France, Germany, Greece
25、, Hungary, Iceland, Ireland, Italy, Latvia,Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 818-2:1996+A1:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/03/2009 07:46, Uncontrolled Co
26、py, (c) BSIEN 818-2:1996+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 MachineryDirective. This Directive stipulates thatwhere chainwith welded links is used for lifting
27、accessories it is to be of short linktype and for the purposes of this standard this is chain having a ratio of nominal pitch to nominal size of 3:1. The extent to which hazards are covered is indicated in the scope of this Part of EN 818. In addition, liftingequipment shall comply as appropriate wi
28、th ! EN ISO 12100“ for hazards which are not covered by thisstandard. Annex C gives a designation system for recording the identifying features of grade 8 short link chain. Since this system is not widely used it has been included in this first edition of this standard as an informative annex,howeve
29、r, should its use become more generally accepted then the status of the information would need to bereviewed. ! This standard is a Type C standard as stated in EN ISO 12100. When provisions of this type C standard are different from those which are stated in type A or B standards, the provisions of
30、this type C standard take precedence over the provisions of the other standards, for equipment that have been designed and build according to the provisions of this type C standard.“BS EN 818-2:1996+A1:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/03/2009 07:46, Uncontrolled Copy, (c
31、) BSIEN 818-2:1996+A1:2008 (E)5 1 Scope ! This part of EN 818 specifies the requirements related to safety for short link chains, grade 8, of mediumtolerance for use in chain slings accor ding to ! EN 818-4:1996+A1“ and for general lifting purposes.“They are electrically welded round steel short lin
32、k chains, heat treated and tested and complying with the general conditions of acceptance in ! EN 818-1:1996+A1“ . The range of nominal sizes of chain covered by this Part of EN 818 is from 4 mmto 45 mm. The hazards covered by this Part of EN 818 are identified in clause 4. The bases for calculation
33、 of tabulated values for dimensions, working load limits and mechanical propertiesare given in annex A. Annex B gives information on weight/metre of chain. Annex C gives an example of a designation system forchains. 2 NormativereferencesThis European Standard incorporates bydated or undated referenc
34、e provisions from other publications.These normative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent revisions to or amendments of anyof these publications applytothis European Standard only when incorporated in it
35、 by amendment or revision. For undated references, thelatestedition of the publication referred to applies.! deleted text“! EN 818-1:1996+A1“ , Short link chain for lifting purposes Safety Part 1: General conditions of acceptance ! EN 818-6:2000+A1“ , Short link chain for lifting purposes Safety Par
36、t6: Chain slings Instructions foruse and maintenance ! EN 1050“ , Safety ofmachinery Risk assessment! EN ISO 12100-1, Safety of machinery - Basic concepts,general principles for design - Part 1: Basic terminology, methodology (ISO 12100-1:2003)EN ISO 12100-2, Safety of machinery -Basic concepts,gene
37、ral principlesfor design - Part 2: Technical principles (ISO 12100-2:2003)“ISO 643, Steels Micrographic determination of the ferritic or austenitic grain size.3 ! Terms and definitions“! For the purposes of this document, the terms, definitions and symbols given in EN 818-1:1996+A1 and the following
38、 apply.“BS EN 818-2:1996+A1:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/03/2009 07:46, Uncontrolled Copy, (c) BSIEN 818-2:1996+A1:2008 (E)6 4 Hazards ! Accidental release of a load, or release of a load d ue to“ failure of lifting accessories such as slings ortheir component parts
39、puts at risk either directly or indirectly the ! safety orhealth“ or health of those persons within the danger zone of lifting equipment. In order to provide the necessary strength and durabilityof lifting accessories this Partof EN 818 lays downrequirements for the design, selection ofmaterials of
40、construction and testing to ensure that specified levels of performance are met. Fatigue failure has not been identified as a ha zard when chain having the specified levels of performance given in this Part of EN 818isused in general lifting service. Since failure can be caused bythe incorrect choic
41、e of grade and specification of lifting accessories this Part ofEN 818 also gives the requirementsformarking and the manufacturers certificate. Those aspects of safe use associated with good practice are given in ! EN 818-6:2000+A1“ . Table 1 contains ! all those hazards“ , which require action to r
42、educe risk identified by risk assessment asbeing specific and significant for short link chain (medium tolerance) grade 8 for lifting purposes.Table 1 Hazards and associated requirements Hazards identified in annex A of ! EN 1050 “ Relevant clause/sub-clause of this standard ! 1 e)“ Mechanical hazar
43、d due to inadequacy ofstrength ! deleted text“5 6 7 5 Safetyrequirements 5.1 General The chain shall also complywith the appropriate requirements of ! EN 818-1:1996+A1“ . 5.2 Dimensions 5.2.1 Nominal size of chain, dnThe nominal size of chain shall be one of the sizes listed in table 2 column 1. 5.2
44、.2Tolerance on material diameter (except at the weld)The tolerance on materialdiameter for each nominal size of chain shall be in accordance with table 2 column2. BS EN 818-2:1996+A1:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/03/2009 07:46, Uncontrolled Copy, (c) BSIEN 818-2:1996+
45、A1:2008 (E)7 5.2.3 WelddiameterThe maximum diameter at the weld for each nominal size of chain shall be in accordance with table 2 column3. The thickness of the steel at the weld shall nowhere be less than the actualdiameter of the steel adjacent to the weld. 5.2.4Length dimensionally affected by we
46、lding The length dimensionallyaffected by welding (e) shall not extend by more than 0,6 dn to either side of thecentre of the link. 5.2.5Pitch and widthsThe dimensions of the pitch and widths of the individual links and chain shall be as specified in table 2 columns 4 to 8, and illustrated in figure
47、 1 of! EN 818-1:1996+A1“ . Table 2 DimensionsDimensions in millimetres(1) (2) (3) (4) (5) (6) (7) (8) Pitch Nominal Size d nMaterialdiametertolerance Welddiameterd s maxp n p maxp minInternalwidth awayfrom weldw 1minExternalwidth overthe weld W 2max4 5 6 7 8 10 13 16 18 19 20 22 23 25 26 28 32 36 40
48、 45 + 0,16 + 0,2 + 0,24 + 0,28 + 0,32 + 0,4 + 0,52 + 0,64 + 0,9 + 1 + 1 + 1,1 + 1,2 + 1,3 + 1,3 + 1,4 + 1,6 + 1,8 + 2 + 2,3 4,4 5,5 6,6 7,7 8,8 11 14,3 17,6 19,8 20,9 22 24,2 25,3 27,5 28,6 30,8 35,2 39,6 44 49,5 12 15 18 21 24 30 39 48 54 57 60 66 69 75 78 84 96 108 120 135 12,4 15,5 18,5 21,6 24,7
49、 30,9 40,2 49,4 55,6 58,7 61,8 68 71,1 77,3 80,3 86,5 98,9 111 124 139 11,6 14,6 17,5 20,4 23,3 29,1 37,8 46,6 52,4 55,3 58,2 64 66,9 72,8 75,7 81,5 93,1 105 116 131 5,2 6,5 7,8 9,1 10,4 13 16,9 20,8 23,4 24,7 26 28,6 29,9 32,5 33,8 36,4 41,6 46,8 52 58,5 14,8 18,5 22,2 25,9 29,6 37 48,1 59,2 66,6 70,3 74 81,4 85,1 92,5 96,2 104 118 133 148 167 BS EN 818-2:1996+A1:2008Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/03/2009 07:46, Uncontrolled Copy, (c) BSIEN 818-2:1996+A1:2008 (E)8 5.3Materials and heat treatment5.3.1 Quality of material
