1、BRITISH STANDARD BS EN 12873-2:2005 Influence of materials on water intended for human consumption Influence due to migration Part 2: Test method for non-metallic and non-cementitious site-applied materials The European Standard EN 12873-2:2005 has the status of a British Standard ICS 13.060.20; 67.
2、250 BS EN 12873-2:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 18 February 2005 BSI 18 February 2005 ISBN 0 580 45516 5 National foreword This British Standard is the official English language version of EN 12873-2:2005. The UK partic
3、ipation in its preparation was entrusted to Technical Committee EH/6, Effects of materials on water quality, 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 inte
4、rnational or European publications referred to 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 pur
5、port to include all the necessary provisions of 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 committ
6、ee any enquiries on the interpretation, or proposals 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 28,
7、 an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN128732 February2005 ICS13.060.20;67.250 Englishversion I
8、nfluenceofmaterialsonwaterintendedforhumanconsumption InfluenceduetomigrationPart2:Testmethodfornon metallicandnoncementitioussiteappliedmaterials Influencesurleaudesmatriauxdestinsentreren contactavecleaudestinelaconsommationhumaine InfluencedelamigrationPartie2:Mthodedessaides matriauxappliqussurs
9、iteexceptlesmatriaux mtalliquesetceuxbasedeciment EinflussvonMaterialienaufTrinkwasserEinflussinfolge derMigrationTeil2:PrfverfahrenfrvorOrt aufgebrachtenichtmetallischeundnichtzementgebundene Materialien ThisEuropeanStandardwasapprovedbyCENon3January2005. CENmembersareboundtocomplywiththeCEN/CENELE
10、CInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthre
11、eofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,E
12、stonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG Managemen
13、tCentre:ruedeStassart,36B1050Brussels 2005CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN128732:2005:EEN 12873-2:2005 (E) 2 Contents Page Foreword 4 Introduction . 5 1 Scope 6 2 Normative references . 6 3 Terms and definitions. 6 4 Principle . 8 5
14、Reagents 8 5.1 General 8 5.2 Waters to be used for testing. 8 5.3 Cleaning liquids for glassware . 8 5.4 Other reagents . 9 6 Apparatus. 9 7 Test pieces. 9 7.1 General requirements 9 7.2 Requirements for the preparation of test piece 10 7.2.1 Site-applied organic lining systems for pipes. 10 7.2.2 J
15、ointing compounds (solvent cements, adhesives) . 10 7.2.3 Other site-applied materials (e.g. greases and sealants) 11 7.3 Surface-area-to-volume ratio (S/V) 11 8 Pretreatment of test pieces 11 8.1 General 11 8.2 Test pieces to be tested at (23 2) C 11 8.2.1 Flushing 11 8.2.2 Stagnation with test wat
16、er 12 8.2.3 Stagnation with disinfection treatment water . 12 8.3 Test pieces to be tested at elevated temperature (60 C to 85 C). 12 8.3.1 Flushing 12 8.3.2 Stagnation with disinfection treatment water at (23 2) C. 12 8.3.3 Stagnation with test water at elevated temperature. 12 8.4 Prewashing 12 9
17、Test procedure 12 9.1 Migration of substances . 12 9.2 Procedural blank tests . 13 9.3 Analysis 13 10 Calculation of test results 14 10.1 Calculation of the concentration of the substances in the migration water . 14 10.2 Calculation of the migration rate of the measured substances 14 10.3 Calculati
18、on of the mean migration rate 14 11 Test report 15 11.1 General information . 15 11.2 Information on the material 15 11.3 Information on the test pieces 15 EN 12873-2:2005 (E) 3 11.4 Information on the test procedure.16 11.5 Test results .16 Annex A (informative) Arrangement for flushing pipes with
19、nominal size greater than DN 80 .18 Annex B (normative) Additional procedure for testing non-homogeneous products and pipes with nominal size greater than DN 8020 B.1 Arrangement for testing 20 B.2 Flushing of the test piece20 B.3 Blank test 20 Annex C (informative) Sequence of additional migration
20、periods in the migration test 22 C.1 Introduction .22 C.2 Migration tests 22 Annex D (informative) Procedural tests using standard additions (positive controls) 24 Annex E (informative) Flow diagrams for migration test procedure for cold water temperature and elevated temperature 25 EN 12873-2:2005
21、(E) 4 Foreword This document (EN 12873-2:2005) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the
22、latest by August 2005, and conflicting national standards shall be withdrawn at the latest by August 2005. It has been drawn up with the objective to describe a test method to determine the migration of substances from non-metallic and non-cementitious materials for use in contact with water intende
23、d for human consumption. This document will result in one of a series of standards on test methods which support the appropriate standards. This document, part 2, is the second in a series of standards for dealing with the influence of migration from materials on water intended for human consumption
24、, including: Part 1: Test method for non-metallic and non-cementitious factory made products; Part 2: Test method for non-metallic and non-cementitious site-applied materials; Part 3: Test method for ion exchange and absorbent resins; Part 4: Test method for water treatment membranes. This document
25、includes a Bibliography. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, I
26、reland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 12873-2:2005 (E) 5 Introduction In respect of potential adverse effects on the quality of water intended for human consumption caused by t
27、he materials, it is called to mind that, while awaiting the adoption of verifiable European acceptance criteria, the relevant national regulations remain in force. EN 12873-2:2005 (E) 6 1 Scope This document specifies a procedure to determine the migration of substances from non-metallic and non- ce
28、mentitious site-applied materials for use in contact with water intended for human consumption. It is applicable to site-applied materials intended to be used under various conditions for the transport and storage of water intended for human consumption, including raw water used for the production o
29、f water intended for human consumption. It covers the extraction by water of substances from these materials after their application on site. The document is applicable to materials whose physical or chemical properties alter during or after on-site application, such as coatings, paints, and adhesiv
30、es. In addition, some site-applied materials that do not change in such a manner, e.g. greases or lubricants, are also included. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For
31、 undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 7393-2, Water quality Determination of free chlorine and total chlorine Part 2: Colorimetric method using N, N-diethyl-1,4-phenylenediamine, for routine control purposes. (ISO 7393-2:1985) 3
32、 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 test technical operation that consists of the determination of one or more characteristics of a given product 3.2 test procedure specified technical method for performing a test 3.3 test report d
33、ocument that presents test results and other information relevant to a test 3.4 testing laboratory laboratory that performs tests 3.5 material manufactured items(s) for application on-site and subsequent contact with water intended for human consumption 3.6 product material, in its finished form aft
34、er application on site, that comes into contact with water intended for human consumption EN 12873-2:2005 (E) 7 3.7 test piece product to be tested for suitability for use in contact with water intended for human consumption 3.8 tap water water intended for human consumption (5.2.1) 3.9 test water w
35、ater used for migration testing (5.2.2 and 5.2.3) 3.10 disinfection treatment water water used for preliminary chlorination (5.2.4) 3.11 prewashing water water used for prewashing (5.2.5) 3.12 blank water test water, (5.2.2 and 5.2.3) which has been kept at the same specified conditions as migration
36、 water (3.15) but without contact with test pieces 3.13 migration movement of a substance or substances from test pieces into test water 3.14 migration period period of time in which the migration is carried out under specified conditions 3.15 migration water test water after exposure to a test piec
37、e under specified conditions 3.16 migration rate mass of a measured substance or substances (in mg) migrating from one square decimetre of a test piece into the test water in one day at a specified temperature (C) 3.17 fitting, ancillary complete functional unit made up of one or more components or
38、materials, parts of which are in contact with water intended for human consumption, e.g. taps, valves, water meters, water filters, pipe connectors and flexible hose assemblies 3.18 lining layer of material applied on site and intended, as a finished product, to come into contact with drinking water
39、, e.g. the inside surfaces of pipes, fittings or storage vessels 3.19 cure conversion of a material into its final form; for example by chemical reaction or drying EN 12873-2:2005 (E) 8 4 Principle Test pieces are taken on site or prepared under specific conditions that are intended to simulate site
40、- application taking into account the manufacturers written instructions. Each test piece is subjected to a specified pretreatment procedure of stagnation and prewashing. The surface of the test piece, that is exposed in practice to water intended for human consumption, is brought into contact with
41、test water during at least three sequential migration periods. A migration period is either; 72 h at 23 C for products intended to come into contact with cold water. 24 h at a specified temperature in the range 60 C to 85 C for products intended to come into contact with warm or hot water. Migration
42、 rates for the first three migration periods are determined by analysis of the required substances in the corresponding migration waters. NOTE 1 The test is carried out under conditions to ensure that calculation of a reliable migration rate is facilitated. These conditions are not meant to simulate
43、 any service condition. Relating the results obtained from this document to the service condition is carried out using a conversion procedure. This procedure will be specified in regulations. NOTE 2 The choice of the type of test water (chlorinated and/or chlorine free), the temperature of the test
44、water, the number of additional migration periods and the necessity for a preliminary chlorination (see Clause 8) will be specified by product/system standards or regulations. 5 Reagents 5.1 General For the purpose of this document, the following reagents apply. 5.2 Waters to be used for testing 5.2
45、.1 tap water, water intended for human consumption with a free chlorine content less than 0,2 mg/l as Cl 2 . 5.2.2 test water, chlorine-free water with a conductivity of 2 mS/m and a total organic content (TOC) of 0,2 mg/l C, e.g. prepared by reverse osmosis, deionization or distillation, followed b
46、y activated carbon filtration. 5.2.3 chlorinated test water, test water according to 5.2.2 having an active chlorine content of (1 0,2) mg/l as Cl2 (5.3). 5.2.4 disinfection treatment water, test water according to 5.2.2 having an active chlorine content of (50 5) mg/l as Cl2 (5.4). 5.2.5 prewashing
47、 water, tap water (5.2.1). 5.3 Cleaning liquids for glassware 5.3.1 hydrochloric acid, concentrated (30 % mass per volume) analytical reagent grade. 5.3.2 hydrochloric acid solution, prepared by slowly adding (0,5 0,01) l of concentrated hydrochloric acid (5.3.1) to (0,5 0,01) l of test water (5.2.2
48、). EN 12873-2:2005 (E) 9 NOTE Care is needed because the solution may generate heat. 5.3.3 nitric acid, concentrated (65 % mass per volume) analytical reagent grade. 5.3.4 nitric acid solution, prepared by slowly adding (0,5 0,01) l of concentrated nitric acid (5.3.3) to (0,5 0,01) l of test water (5.2.2). NOTE Care is needed because the solution may generate heat. 5.3.5 sulphuric acid, concentrated (density 1,84 g/ml) analytical reagent grade. 5.3.6 chromic acid, anal
