BS EN 10333-2005 Steel for packaging - Flat steel products intended for use in contact with foodstuffs products or beverages for human and animal consumption - Tin coated steel (ti.pdf

1、BRITISH STANDARD BS EN 10333:2005 Steel for packaging Flat steel products intended for use in contact with foodstuffs, products or beverages for human and animal consumption Tin coated steel (tinplate) The European Standard EN 10333:2005 has the status of a British Standard ICS 67.250 BS EN 10333:20

2、05 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 4 May 2005 BSI 4 May 2005 ISBN 0 580 45952 7 National foreword This British Standard is the official English language version of EN 10333:2005. The UK participation in its preparation was ent

3、rusted to Technical Committee ISE/29 Tinplate and blackplate, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to

4、in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of

5、 a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or prop

6、osals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 12, an inside back cover and a back cover. The BSI

7、 copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN10333 April2005 ICS67.250 Englishversion SteelforpackagingFlatsteelproductsintendedforusein contactwith

8、foodstuffs,productsandbeveragesforhumanand animalconsumptionTincoatedsteel(tinplate) AcierpouremballageProduitsplatsenacierdestin entreraucontactdesdenres,produitsetboissonspour lalimentationdelhommeetdesanimauxAcierrevtu dtain(ferblancoufertam) VerpackungsblechFlacherzeugnisseausStahlfrdie Verwendu

9、nginBerhrungmitLebensmitteln,Produkten undGetrnkenfrdenmenschlichenundtierischen VerzehrVerzinnterStahl(Weiblech) ThisEuropeanStandardwasapprovedbyCENon7March2005. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanat

10、ionalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation underth

11、eresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembou

12、rg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2005CEN Allrightsofexploitationinanyformandbyanymeansre

13、served worldwideforCENnationalMembers. Ref.No.EN10333:2005:EEN 10333:2005 (E) 2 Contents Page Foreword 3 1 Scope .4 2 Normative references .4 3 Terms and definitions.4 4 Information to be provided by the purchaser .5 5 Dimensions and dimensional tolerances5 6 Requirements 5 6.1 Base metal.5 6.2 Tin

14、coating.5 6.3 Passivation and oiling 5 7 Checks .6 8 Sampling6 9 Test method.6 10 Designation .6 11 Marking, labelling, packaging 6 Annex A (normative) Determination of lead7 A.1 Scope .7 A.2 Principle.7 A.3 Apparatus 7 A.4 Reagents7 A.5 Health and safety 8 A.6 Instructions .8 A.7 Figures.8 A.8 Expr

15、ession of results11 Bibliography.12 EN 10333:2005 (E) 3 Foreword This document (EN 10333:2005) has been prepared by Technical Committee ECISS/TC 26 “Tinmill products - Qualities, dimensions, tolerances and specific tests”, the secretariat of which is held by BSI. This European Standard shall be give

16、n the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2005, and conflicting national standards shall be withdrawn at the latest by October 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizatio

17、ns of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia

18、, Spain, Sweden, Switzerland and United Kingdom. EN 10333:2005 (E) 4 1 Scope This document specifies the composition of the base steel used for the production of tinplate for use in direct contact with foodstuffs or products for human and animal consumption as well as the composition of tin used to

19、coat it. Tinplate can be produced with or without an organic coating. The main examples of use are: drinks cans, food cans, packaging of dry foods, aerosol cans. The material should be chosen in accordance with the conditions for its use. This standard does not apply to categories of steel other tha

20、n steel for packaging intended for use in contact with foodstuffs, products or beverages for human or animal consumption. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undate

21、d references, the latest edition of the referenced document (including any amendments) applies. EN 610, Tin and tin alloys Ingot tin EN 10202:2001, Cold reduced tinmill products Electrolytic tinplate and electrolytic chromium/chromium oxide coated steel EN 10204, Metallic products Types of inspectio

22、n documents EN 10334, Steel for packaging Flat steel products intended for use in contact with foodstuffs, products and beverages for human and animal consumption - Non-coated steel (blackplate) EN ISO 14284, Steel and iron Sampling and preparation of samples for the determination of chemical compos

23、ition (ISO 14284:1996) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 tinplate cold-rolled blackplate coated on at least one side with a layer of tin. The mass of the coating can reach up to 15.1 g/m 3.2 blackplate See EN 10334 3.3 steel int

24、ended for use in contact with foodstuffs See EN 10334 EN 10333:2005 (E) 5 3.4 passivation surface treatment designed to improve resistance to oxidation, resistance to sulphurizing and ease of lacquering or printing on the tin coating 3.5 steel for packaging See EN 10334 3.6 steel for other applicati

25、ons than packaging See EN 10334 4 Information to be provided by the purchaser The information, which shall be provided by the purchaser at the time of enquiry and order, shall satisfy the requirements of EN 10202. NOTE Furthermore, the purchaser can specify the type of oil suitable for food contact

26、to be used when the product is delivered oiled. 5 Dimensions and dimensional tolerances The nominal dimensions shall be agreed at the time of enquiry and order. Dimensional tolerances shall meet the requirements of Clause 9 of EN 10202:2001. 6 Requirements 6.1 Base metal The composition of the base

27、metal shall meet the requirements of EN 10334. NOTE As described in EN 10202:2001 informative Annex A, tighter limits may be necessary for certain elements particularly for manufacturing reasons. 6.2 Tin coating The chemical composition of the tin ingot used shall comply with the requirements set do

28、wn in EN 610 for grade Sn99.85 with the exception of the Pb content, which shall be 0.010 %. The Pb content of the tin coating shall be 0,010 %. 6.3 Passivation and oiling The requirements specified in EN 10202 shall apply. Unless otherwise specified at the time of enquiry and order, the products de

29、livered shall be coated with an oil that is suitable for contact with foodstuffs. EN 10333:2005 (E) 6 7 Checks At the request of the purchaser, conformity with the order requirements shall be proven in accordance with this standard. Unless otherwise specified, the inspection document 2.1 shall be us

30、ed in accordance with EN 10204. 8 Sampling The sampling process and the preparation of the sample shall be in accordance with the requirements of EN ISO 14284. 9 Test method Lead present in the tin coating shall be assayed in accordance with the requirements contained within Annex A. Other methods c

31、an be used. Nevertheless, in cases of dispute, the method defined in Annex A is the reference method. 10 Designation The designation shall be in accordance with EN 10202. 11 Marking, labelling, packaging Each coil or bundle shall display a label indicating the reference to this standard, the name an

32、d the trademark of the manufacturer and the batch identification. The packaging specifications shall be agreed at the time of enquiry and order. EN 10333:2005 (E) 7 Annex A (normative) Determination of lead A.1 Scope Measurement of the lead content of tin coating for steel for packaging. A.2 Princip

33、le Coulometric dissolution of tin coating in hydrochloric acid; Elimination of tin through hydrobromic distillation; Placing of remaining elements into solution and assaying of lead by means of atomic absorption spectro- photometry. A.3 Apparatus Direct current generator for currents of between 0 mA

34、 and 500 mA; Potentiometer recorder with a range of 0 mV to 2500 mV; Calomel electrode (ECS) and counter-electrode in platinum wire; Glass laboratory receptacles and adjustable hot plate; Air-drying vinyl spray paint can; Atomic absorption spectro-photometer with oven able to detect between 0 g/l an

35、d 100 g/l lead. A.4 Reagents All of the solutions shall be prepared on the basis of products intended specifically for toxicological analyses: Hydrochloric acid 2N; Hydrochloric acid at 10 %; Bromine solution at 10 % in hydrobromic acid; Sulphuric acid 9N; Lead standard solution at 5 g/mI prepared b

36、y dilution of a commercial solution at 1 g/l. EN 10333:2005 (E) 8 A.5 Health and safety For the needs of the following instructions, the safety data sheets of the relevant used chemicals are applicable. A.6 Instructions Cut out a strip of tinplate (about 12 cm x 2.5 cm); Lacquer the surface which is

37、 not analysed; Overlap the edges of the sample, with the plain surface inwards, mount on a steel sample-holder (see Figure A.1) and insert into a 150 ml low profile beaker; Add about 50 ml of hydrochloric acid 2N, so that the tinplate is completely submerged; Position the electrode system (see Figur

38、e A.2) and perform the coulometric dissolution of tin by applying a current of 8 mA/cm; Load the dissolution curve of tin with the potentiometric recorder; Remove the sample and the electrodes, rinse in 2 changes of water and add 2 ml of sulphuric acid 9N; Reduce the volume to 5 ml approx. through s

39、oft evaporation; Add 5 ml of the bromine solution and proceed to the distillation of the tin by increasing the heat and stirring the contents of the beaker continuously; When white sulphuric flames begin to be produced, turn the heat up to a very high temperature to eliminate the sulphuric acid enti

40、rely; Leave to cool, then take up the dry residue with 10 ml hydrochloric acid to 10 % by placing on a low heat to dissolve; Transfer into a 100 ml volumetric flask and assay the lead by means of an electrothermal atomic absorption spectro-photometry; Carry out simultaneous blank tests for all reage

41、nts and at least 2 reference points leading to final solutions before spectro-photometry containing between 0 g/l and 100 g/l of lead (1 ml of the standard solution diluted in 100 ml leads to 50 g/l of lead). A.7 Figures Sample holder: fold a strip of blackplate 1 cm wide in half lengthways, leaving

42、 sufficient space between the two sides of the fold to slide in the cylinder of tinplate as shown in Figure A.1: EN 10333:2005 (E) 9 1 2 3 4 5 6 7Key 1 Band of blackplate 2 Axis of folding 3 Folding 180 4 Axis of folding 90 5 Sliding in the fold 6 White iron sample hemmed 7 Fixed sample seen aside F

43、igure A.1 Sample holder EN 10333:2005 (E) 10 1 2 3 4 5 6 7 8 - +Key 1 Generator 2 Auxiliary electrode in platinum 3 Electrode of reference (EC) 4 Recorder 5 HCI 2N 6 Beaker 150 ml 7 Sample support in black plate 8 Connection clip Figure A.2 Coulometry cell EN 10333:2005 (E) 11 A.8 Expression of resu

44、lts A.8.1 Weight of tin dissolved An example of the free and alloyed tin dissociation curve is given in Figure A.3. 1 2 E (mV) t (s)Key 1 t total2 t 1(free tin) Figure A.3 Free and alloyed tin dissolution curve NOTE The time and dissolution characteristics of free and alloyed tin are taken at the po

45、ints of inflection of the voltage level steps measured by the potentiometric recorder. To calculate the amount of dissolved alloyed tin (FeSn 2 ) use the following formulae: t total - t 1= t 2 where 2 t 2 / 3 seconds for Sn of alloyed Sn Total time for dissolving t Sn : t Sn= t 1+ 2t 2 /3 in seconds

46、 Mass of dissolved tin (Faradays law) in mg: (96500) 2 119 t 8S sn ( 1 ) where S is the surface area of the sample in cm A.8.2 Lead concentration: % Lead content of tin coating = sn t S C 2(2) Where C is the concentration of lead detected in g/l NOTE In practice, sampling in the range 0-100 g/l is a

47、djusted for a sample of several tens of cm (as an example, S = 30 cm for 12 cm x 2,5 cm) and whose tin coating is greater than 2,8 g/m. In the case of a thinner tin coating and/or a sample with small surface area, the calibration curve shall be plotted for a lower range. EN 10333:2005 (E) 12 Bibliog

48、raphy 1 Directive 89/109/EEC of 21 December 1988 on materials and articles intended to come into contact with foodstuffs. 2 Directive 94/62/EC of the European Parliament and Council of 20 December 1994 on packaging and packaging waste. 3 Council of Europe Guidelines for metals and alloys intended to come into contact with foodstuffs 4 EN 10079, Definition of steel products blankBS EN 10333:2005 BSI 389 Ch