【正文】 ......................................... .... 18 9 Information for use and assembly of the hoist chain into the hoist .................................. 18 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 hoists. Types T, DAT and DT ........................................................................................................... ... 23 Annex C (informative) Designation system for hoist chain grade T ............................................ 31 Annex D (informative) Approximate mass of Grade T hoist chain ................................................. 32 Annex E (informative) Chain use ........................................................................................................ 33 Annex ZA (informative) Relationship of this document with EC Directives .................................. 34 Bibliography .......................................................................................................................................... 35 2 EN 8187:2020 (E) 3 Foreword This document EN 8187:2020 has been prepared by Technical Committee CEN /TC 168 Chains, ropes, webbings, slings and accessories, the secretariat of which is held by 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of an identical text or by endorsement, at the latest by August 2020, and conflicting national standards shall be withdrawn at the latest by August 2020. This document has been prepared under 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 annex ZA, which is an integral part of this document. The other parts of EN 818 are: Part 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 provided by the manufacturer. This is the first edition of this part of EN 818. The annexes A and B are normative. The annexes C, D, E and ZA are informative. According to the CEN/CENELEC Internal Regulations, the national standards anizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. EN 8187:2020 (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 pitch 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 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 fine 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 bee more generally accepted then the status of the information would need to be reviewed. 1 Scope This European Standard 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 used 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 conforming to EN 8181. 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. EN 8187:2020 (E) 5 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, 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 references, the latest edition of the publication referred to applies (including amendments). EN 2921:1991, Safety of machinery – Basic concepts – General principles for design – Part 1: Basic terminology, methodology. EN 2922:1991/A1:1995, S