【正文】 es on material diameters are based on: a) 177。 BSI 091999 Page 8 EN 8183:1999 Mechanical properties Manufacturing proof force (MPF) All the chain shall be subjected to the manufacturing proof force specified in Table 5, column 3 for the appropriate nominal size of chain. Breaking force (BF) and total ultimate elongation (A) Samples of chain in the finished condition shall have a breaking force at least equal to that specified in Table 5, column 4 for the appropriate nominal size of chain. On pletion of the static tensile test the total ultimate elongation as defined in EN 8181:1996 shall be not less than 25 %. Bend deflection Single link samples shall withstand the minimum deflection specified in Table 5, column 5 for the appropriate nominal size of chain and shall be free from visible defects. Table 5 — Working load limits and test requirements 1 2 3 4 5 Nominal size, dn mm Working load limit, WLL t Manufacturing proof force, MPF kN Breaking force, BF kN min. Bend deflection, f mm min. 7 0,75 15,4 30,8 5,6 8 1 20,1 40,2 6,4 10 1,6 31,4 62,8 8 13 2,65 53,1 106 10 16 4 80,4 161 13 18 5 102 204 14 19 5,6 113 227 15 20 6,3 126 251 16 22 7,5 152 304 18 23 8 166 332 18 25 10 196 393 20 26 10,6 212 425 21 28 12,5 246 493 22 32 16 322 643 26 36 20 407 814 29 40 25 503 1 010 32 45 31,5 636 1 270 36 6 Verification of safety requirements Qualification of personnel All testing and examination shall be carried out by a petent person. 169。C and then cooled to room temperature。C. The tempering conditions shall be at least as effective as a temperature of 475 176。2,3 49,5 135 139 131 58,5 167 Page 7 EN 8183:1999 169。1,8 39,6 108 111 105 46,8 133 40 177。1,4 30,8 84 86,5 81,5 36,4 104 32 177。1,3 27,5 75 77,3 72,8 32,5 92,5 26 177。1,1 24,2 66 68 64 28,6 81,4 23 177。1 20,9 57 58,7 55,3 24,7 70,3 20 177。0,64 17,6 48 49,4 46,6 20,8 59,2 18 177。0,4 11 30 30,9 29,1 13 37 13 177。0,28 7,7 21 21,6 20,4 9,1 25,9 8 177。 BSI 091999 3 Terms and definitions For the purposes of this part of EN 818, the terms, definitions and symbols given in EN 8181:1996 apply. 4 Hazards The release of a load due to failure of lifting accessories such as chain slings or their ponent parts puts at risk either directly or indirectly the safety or health of those persons within the danger zone of lifting equipment. In order to provide the necessary strength and durability of lifting accessories this part of EN 818 lays down requirements for the design, manufacture and testing to ensure that specified levels of performance are met. Fatigue failure has not been identified as being a hazard when chain, having the specified levels of performance given in this part of EN 818, is used in general lifting service. Since failure can be caused by the incorrect choice of grade and specification of lifting accessories this part of EN 818 also gives the requirements for marking and the manufacturer’s certificate. Those aspects of safe use associated with good practice are given in prEN 8186. Table 1 contains those hazards which require action to reduce risk identified by risk assessment as being specific and significant for short link chain (medium tolerance) grade 4. Table 1 — Hazards and associated requirements Hazards identified in EN 1050:1996, annex A Relevant clause of EN 2922:1991/A1:1995, annex A Relevant clause/subclause of this part of EN 818 1e) Mechanical hazard due to inadequacy of strength 5 5 5 6 7 8 9 5 Safety requirements General The chain shall also conform to the appropriate requirements of EN 8181:1996. Dimensions Nominal size of chain, dn The nominal size of the chain shall be one of the sizes listed in Table 2, column 1. Tolerance on material diameter (except at the weld) The tolerance on the material diameter for each nominal size of chain shall be in accordance with Table 2, column 2. Page 6 EN 8183:1999 169。 BSI 091999 Foreword This European Standard has been prepared by Technical Committee CEN/TC 168, Chains, ropes, webbing, slings and accessories — Safety, 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 November 1999, and conflicting national standards shall be withdrawn at the latest by November 1999. 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 requirements of EU Directive(s). For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this standard. 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, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. The other parts of EN 818 are: Part 1: General conditions of acceptance Part 2: Medium tolerance chain for chain slings — Grade 8 Part 4: Chain slings — Grade 8 Part 5: