1、BRITISH STANDARD Materials and articles in contact with foodstuffs - Non-metallic articles for catering and industrial use - Method of test for the determination of impact resistance The European Standard EN 12980:2 has the status of a British Standard ICs 67.250 NO COPYING WITHOUT BSI PERMISSION EX
2、CEPT AS PERMMTED BY COPYRIGAT LAW BS EN 12980:2000 STD-BSI BS EN 22980-ENGL 2000 II 2b2qbbS 0852292 5bB BS EN 129802000 This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Committee, was published under the authority of the Standards Committee
3、 and comes into effect on 15 June 2000 National foreword This British Standard is the official English language version of EN 129802000. The UK participation in its preparation was entrusted to Technical Committee CW/29, Tableware, which has the responsibility to: - aid enquirers to understand the t
4、ext; - present to the responsible European committee any enquiries on the - monitor related international and European developments and promulgate interpretation, or proposals for change, and keep the UK interests informed; them in the UK. A list of organizations represented on this committee can be
5、 obtained on request to its secretary. 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 “Fi
6、nd facity of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal o
7、bligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. The BSI copynght notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd.
8、No- ID* Comments O BSI 06-2000 ISBN O 580 34612 9 STDOBSI BS EN 12980-ENGL 2000 = 3b24bbS 0853273 4T4 EUROPEAN STANDARD EN 12980 NORME EUROPENNE EUROPISCHE NORM March 2000 ICs 67.250 English version Materiais and articles in contact with foodstuffs - Non-metallic articles for catering and industrial
9、 use - Method of test for the determination of impact resistance Matriaux et articles en contact avec les denres alimentaires - Objets non mtalliques usage industriel pour la cuisine et le transport de nourriture - Mthode dessai permettant de dterminer la rsistance au choc Werkstoffe und Gegenstnde
10、in Kontakt min Lebensmitteln - Nichtmetallische Gegenstande fr gastronomische und gewerbliche Zwecke - Verfahren zur Bestimmung des Schlagwiderstandes This European Standard was approved by CEN on 18 February 1999 CEN members are bound to comply with the CENICENELEC Internal Regulations which stipul
11、ate the conditions for giving this Europein Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning sich national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exi
12、sts in three official versions (English, French, German). A version in any other language made by tmislation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as tie official versions. CEN members are the national standards bod
13、ies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Genany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Ce
14、ntral Secretariat: rue de Stassart, 36 8-1050 Brussels O 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12980:2000 E STD=BSI BS EN L2980-ENGL 2000 Lb24bb7 0851294 Page 2 EN 12980:2000 Contents Foreword 1 Scope 2 Normative ref
15、erences 3 Principle 4 Sampling 5 Apparatus 6 Procedure 7 Test report Table 1 - Relationship between angular displacement z and height of fall h 330 = Page 2 2 3 3 4 4 5 6 7 Table 2 - Relationship between angular displacement a and impact velocity v Table 3 - Relationship between height of fall h, ma
16、ss of hammer rn and impact for different lengths of pendulum 1 energy E 9 8 Foreword This European Standard has been prepared by Technical Committee CEN/TC 194, Utensils in contact with food, the Secretariat of which is held by BSI. This European Standard shall be given the status of a national stan
17、dard, either by publication of an identical text or by endorsement, at the latest by September 2000, and conflicting national standards shall be withdrawn at the latest by September 2000. According to the CENCENELEC Internal Regulations, the national standards organizations of the following countrie
18、s 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. 1 Scope This standard gives a method of test for determ
19、ination of the resistance to mechanical shocks of articles used in catering and industrial services where they are subjected to substantial and frequent shocks. It is well known that the results of this test procedure depend upon the details of the test conditions). The results therefore cannot be g
20、eneralized for other utensils made of the same mc terial, nor to other test conditions. The results are only valid for the article and test conditions specified in the test report. ) See paper by R O Heckroodt and V Frith, Impact strength and chipping resistance of dinner plates, Tnterceram 39, NO 2
21、 pp 32-34 1990. O BSI 06-2000 Page 3 EN 12980:2000 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 d
22、ated 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 10109-1, Metallic mater
23、ials - Hardness test - Part 1: Rockwell test (scales A, B, C, D, E, F, G, H, and K) and Rockwell superficial test (scales 15N, 30N, 45N, 15T, 30T and 45T). 3 Principle The method uses an impact testing machine that subjects the article to be tested to a blow from a hammer of mass m, on the end of a
24、pendulum of negligible mass and length 1 raised to an angle a from the vertical and let fall from a height h at a velocity v. The relationships between m, E, h, a and v are given by the equations: h = l(1-cosa) (1) The kinetic energy of the shock (the impact energy, E) is expressed by the relationsh
25、ips: E = mgh (3) and (4) 2 E = %mv and represents a measure of the resistance of the article under test to the shock administered where: h is the height of fall of the hammer, in metres; I is the length of the pendulum arm, in metres; a is the angular displacement of the arm from the vertical, in de
26、grees; v is the velocity of fall of the hammer, in metres per second; g is the acceleration due to gravity (= 9,81 mos2); m is the mass of the pendulum hammer including the arm, in kilograms; E is the impact energy, in joules. 8 BSI 06-2000 Page 4 EN 12980:ZOOO NOTE: The velocity of fall is usually
27、not less than 0,Z md. 4 Sampling The sample size shall be a minimum of ten test specimens. NOTE: recorded in the test report see 7 c). The sampling plan should be agreed by the purchaser and/or supplier and 5 Apparatus Pendulum impact testing machine, consisting of the following components, all of w
28、hich are metal, assembled as shown diagrammatically in Figure 1. 5. 1 A pendulum swinging on a horizontal pivot, comprising a rigid lightweight metal arm with a radius of swing of 0,Z m to 0,7 m and a hammer of mass 0,l kg to 1,0 kg which constitutes the major part of the combined mass of the pendul
29、um and hammer. The centre of gravity of the pendulum may therefore be considered to be coincident with that of the hammer. The hammer has an interchangeable striking head made from a steel of hardness 55 to 65 HRC (conforming to EN 10109-1). The striking face of the head is normally spherical in sha
30、pe but other profiles may be used. NOTE: tested. The type of the head is chosen according to the shape of the article to be 5.2 A mechanism (optional) to raise the pendulum to the desired height and to trigger its fall. 5.3 A dial to measure the angular displacement of the pendulum from the vertical
31、 and/or the corresponding height of fall h and impact energy E. 5.4 A column to support the pendulum and the dial. 5.5 A support which permits a test specimen to be held on the apparatus in a defined position. NOTE: horizontally and/or tilted. The support should be designed to adjust the specimen ve
32、rtically, 5.6 A supporting fixture, which permits a test specimen to be held on the apparatus by a minimum restraining force when it is necessary to prevent movement of the specimen on impact. NOTE: The supporting fixture may have the shape of a V with an angle of 120“. 5. 7 A protective screen to p
33、rotect personnel against splinters. O BSI 06-2000 STD*BSI BS EN 12980-ENGL 2000 Lb24bb7 0853277 04T 0 Page 5 EN 12980:2000 5. 8 A heavy level base, on which the components of the testing machine are mounted. NOTE: the floor. The most effective way to provide for an absolutely rigid base is to fix it
34、 to 6 Procedure Use Tables 1,2 and 3 to choose the appropriate conditions to perform the test. Place the test specimen on the apparatus so that the hammer in the resting position touches it at the desired point of impact, making sure that the specimen is against the supporting fixture (5.6) if appli
35、cable. Close the protective screen; lift the pendulum to the height corresponding to the chosen energy of impact. Release the pendulum. Examine the article under test. Record the result of the test as positive if the article has not broken and does not show any visible signs of chipping, cracking or
36、 fissuring. According to the objectives of the test and the test programme either: a) procedure; for testing by attributes: Place another test specimen on the support and repeat the b) progressively increasing the energy level until the article chips or cracks or until a predetermined energy level i
37、s reached. Alternatively repeat the procedure, without changing the energy level, on the same article, one or several times, hitting the article in the same or in different places. for testing by variables: Repeat the procedure on the same test specimen, Record the experimental conditions and the re
38、sults. a BSI 06-2000 STD-BSI BS EN 32780-ENGL 2000 Lb24bb9 0853278 T8b m Page 6 EN 12980:2000 7 Test report The test report shall include the following information: a) description of the articles under test; b) the number of articles in the lot to be tested; c) the sampling plan and the procedure fo
39、r selecting test specimens from the lot; d) the number of articles tested; e) height of fall, impact energy, zone and angle of impact, specimen unrestrained or fixed to the support, etc.); the test conditions in detail (temperature, mass and type of hammer head, f) energy level; for testing by attri
40、butes: the number of articles broken or damaged at the selected g) where applicable, and the energy values and height of fall at which the articles are broken or damaged; alternatively the number and location of impacts; for testing by variables: initial energy level and the successive higher energy
41、 levels, h) mean value and scatter of the results for testing by variables; j) any other relevant details of the test procedure. O BSI 06-2000 STD-BSI BS EN L2780-ENGL 2000 W 3b24bb7 0853277 712 W 30 35 Page 7 EN 12980:2000 0,027 0,040 0,054 0,067 0,080 0,094 0,036 0,054 0,072 0,09 1 O, 109 O, 127 T
42、able 1 -Relationship between angular displacement a and height of fall h for different lengths of pendulum 1 40 0,047 0,070 0,094 0,117 0,140 O, 164 45 0,059 0,088 0,117 0,147 O, 176 0,205 50 0,07 1 O, 107 O, 143 O, 179 0,2 14 0,250 r 55 0,085 O, 128 O, 170 0,2 13 0,256 0,298 I Angular I Length of p
43、endulum 1 (in m) I 60 65 I adegrees I Height of fall h (in m) o, 1 O0 0,150 0,200 0,250 0,300 0,350 0,115 0,173 0,23 1 0,289 0,346 0,404 145 150 0,364 0,546 0,728 0,9 1 O 1 ,O9 1 1,273 0,373 0,560 0,746 0,933 1,120 1,306 O BSI 06-2000 STD-BSI BS EN L2980-ENGL 2000 m Lb24bb9 0853300 qbi m Page 8 EN 1
44、2980:2000 Table 2 - Relationship between angular displacement a and impact velocity v for different lengths of pendulum I I180 I 2,801 I 3,431 I 3,962 I 4,429 I 4,852 I 5,241 1 O BSI 06-2000 STD-BSI BS EN 32780-ENGL 2000 II 3b2Libb7 0853303 3TO Page 9 EN 12980:2000 Table 3 - Relationship between hei
45、ght of fall h, mass of hammer m and impact energy E 8 BSI 06-2000 Page 10 EN 12980:2000 Legend a) Side view b) Top view 1 Dial 2 Pendulum arm 3 Article under test 4 Supporting fixture 5 6 Hammer 7 8 Base 9 Angular displacement Support to hold the item under test Column to support pendulum and dial F
46、igure 1 - Pendulum impact testing machine O BSI 06-2000 STDDBSI BS EN LZ780-ENGL 2000 E 3b2ibbS 0853303 373 BS EN 12980:2000 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the
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