BS EN 16058-2012 Influence of metallic materials on water intended for human consumption Dynamic rig test for assessment of surface coatings with nickel layers Long-term test metho.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 16058:2012Influence of metallic materialson water intended for humanconsumption Dynamic rigtest for assessment of surfacecoatings with nickel layers Long-term test methodBS

2、 EN 16058:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 16058:2012.The UK participation in its preparation was entrusted to TechnicalCommittee EH/6, Effects of materials on water quality.A list of organizations represented on this committee can beobtained

3、 on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 69831 6ICS 67.250Compliance with a Briti

4、sh Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2012.Amendments issued since publicationDate Text affectedBS EN 16058:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1605

5、8 May 2012 ICS 67.250 English Version Influence of metallic materials on water intended for human consumption - Dynamic rig test for assessment of surface coatings with nickel layers - Long-term test method Influence des matriaux mtalliques sur leau destine la consommation humaine - Banc dessai dyna

6、mique pour lvaluation des revtements de surface ayant des couches de nickel - Mthode dessai long terme Einfluss metallischer Werkstoffe auf Wasser fr den menschlichen Gebrauch - Dynamischer Prfstandversuch fr die Beurteilung von Oberflchenbeschichtungen mit Nickelschichten - Langzeit-Prfverfahren Th

7、is European Standard was approved by CEN on 13 April 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical referen

8、ces concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN m

9、ember into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Icela

10、nd, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre:

11、 Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16058:2012: EBS EN 16058:2012EN 16058:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms and definition

12、s .54 Principle 75 Test rig 76 Operation 76.1 General 76.2 Conditioning .87 Test water .87.1 General 87.2 Check of test water 88 Sampling .88.1 General 88.2 Test water sampling 88.3 Sampling to determine metal release 88.4 Sampling volumes .99 Analysis 910 Expression of results 910.1 Nickel concentr

13、ation calculation for end point devices 910.2 Nickel concentration calculation for in-line devices . 1010.3 Mean concentration after a given period of operation (T) 1010.4 Presentation of results . 1011 Test report . 11Annex A (normative) Test rig components and assembly Test rig 12Annex B (informat

14、ive) Example of graphs for expression of results 14Bibliography . 16BS EN 16058:2012EN 16058:2012 (E) 3 Foreword This document (EN 16058:2012) 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 stat

15、us of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2012, and conflicting national standards shall be withdrawn at the latest by November 2012. Attention is drawn to the possibility that some of the elements of this document may be the s

16、ubject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This European Standard is one of a series of test methods that supports associated product standards. With respect to potential adverse effects on the quality of water intended fo

17、r human consumption caused by metallic materials, attention is drawn to the fact that the relevant national regulations remain in force until the adoption of verifiable European acceptance criteria. Water intended for human consumption is hereafter referred to as “drinking water“ and means the same

18、as the definition given at Article 2(1) of the Council Directive 98/83/EC on the quality of water intended for human consumption. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria,

19、 Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingd

20、om. BS EN 16058:2012EN 16058:2012 (E) 4 Introduction Contact between metallic materials and drinking water can cause metal release to the water. Metal released from product surfaces in contact with drinking water is caused by corrosion of any metal films or layers present on the products and the bul

21、k material. Metal release from the bulk material depends on the composition of the material. The bulk material can release metals for a long period. This long term behaviour depends on the formation of protective layers of corrosion products on the surface of the material. It is possible to test mat

22、erials to assess their behaviour in releasing metals from the bulk material (EN 15664-1 and -2) so that products made of accepted materials do not have to be tested for this characteristic. The metal release from metal layers due to coating or other production processes depends on the characteristic

23、s of those processes. Therefore products must be tested for metal release due to the presence of films or layers on the surface of products. The test method given in this standard is designed to provide information on nickel release over time from surfaces of products having a coating containing nic

24、kel which are in contact with drinking water. This nickel coating may be added intentionally or part formed unintentionally i.e. it might appear due to electrostatic conditions in the process. For testing nickel release caused by the bulk material the test procedure according to EN 15664-1 and -2 is

25、 required. This test is based on EN 15664-1, Influence of metallic materials on water intended for human consumption Dynamic rig test for assessment of metal release Part 1: Design and operation. It includes alternating periods of once-through flow and stagnation in a rig, simulating the conditions

26、in a domestic distribution system. For the commonly used chrome plating process of sanitary tap ware, preliminary research indicates that the water composition does not significantly influence the release of nickel from such surface nickel layers. The use of this method in product testing might give

27、 more information about the influence of water composition. If this test method is used to measure the release of other metals it must be taken into account that the water composition has a strong influence on the results. BS EN 16058:2012EN 16058:2012 (E) 5 1 Scope This European Standard specifies

28、a procedure to determine the release of nickel from nickel layers or a coating containing nickel on inner surfaces of products which are intended to come into contact with drinking water1). 2 Normative references The following documents, in whole or in part, are normatively referenced in this docume

29、nt and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12502-1:2004, Protection of metallic materials against corrosion Guidance on the assessment

30、 of corrosion likelihood in water distribution and storage systems Part 1: General EN 15664-1:2008, Influence of metallic materials on water intended for human consumption Dynamic rig test for assessment of metal release Part 1 Design and operation EN ISO 8044:1999, Corrosion of metals and alloys Ba

31、sic terms and definitions (ISO 8044:1999) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 8044:1999, EN 12502-1:2004 and the following apply. 3.1 test rig assembly of a number of test lines and one control line Note 1 to entry: See Clause 5 and An

32、nex A, Figure A.1. 3.2 line for a test rig equipped with end point device products: Continuous part between a check valve and the free outlet(s) for a test rig equipped with in-line devices products: Continuous part between a check valve and the corresponding flow regulator 3.3 test line line contai

33、ning one product for end point devices or up to five products for in-line devices 3.4 control line line containing a single length of pipe made on an inert material for the purposes of the test 3.5 dummy line pipe made of an inert material for the purpose of the test used for the conditioning run of

34、 a newly built test rig 1) Water intended for human consumption is referred to as “drinking water“ and means the same as the definition given at Article 2(1) of the Council Directive 98/83/EC on the quality of water intended for human consumption. Luxembourg, Office for Official Publications of the

35、European Communities. 3 November 1998. BS EN 16058:2012EN 16058:2012 (E) 6 3.6 product product as manufactured with the process parameters which are used in normal production 3.7 end point device product used to control the flow of water and releasing it to the atmosphere EXAMPLES Taps for kitchen a

36、nd wash basins. 3.8 in-line device product used in a drinking water system that is not a tube or pipe, e.g. valve used to control the flow of water in an installation system but not dispensing to atmosphere EXAMPLE Ball valves. 3.9 local water drinking water from a particular supply zone 3.10 test w

37、ater water used for testing purposes Note 1 to entry: See 7.1. 3.11 contact water test water which has been in contact with a test line 3.12 control water test water which has been in contact with a control line 3.13 flow regime consecutive alternating periods of flow, at a given flow rate, and stag

38、nation of the test water in the test rig 3.14 representative water sample volume of water in the test line containing metals released from the product(s) to be tested 3.15 period of operation or operation period (T) period of time during which the flow regime is operated for a particular test Note 1

39、 to entry: Time is expressed in weeks. 3.16 stagnation time (t) period of time when the test water is static in the test rig Note 1 to entry: Time is expressed in hours. 3.17 run-time curve graphical representation of the relationship between the concentration after 4 hours of stagnation, over the p

40、eriod of operation (T) BS EN 16058:2012EN 16058:2012 (E) 7 4 Principle Representative samples of endpoint and inline devices to be tested are installed in a test rig which is operated for 26 weeks under controlled conditions of water quality, temperature and flow regime. Water samples are taken at s

41、pecified operation periods after 4 h stagnation time throughout the whole of the test and analyzed for the nickel concentrations. The products for testing shall be representative for the products intended to be placed on the market. If the same product might come from several manufacturing (plating)

42、 operations samples of each plant shall be tested. 5 Test rig The test rig shall be constructed in accordance with Annex A in addition to the requirements given in this clause. For in-line devices, a total of fifteen representative samples of the product to be tested shall be installed in a minimum

43、of three test lines of a test rig (see Figure A.1). For endpoint devices, five test lines each containing one representative sample of the product to be tested shall be installed in a test rig (see Figure A.2). In addition to the test lines one control line shall be installed and operated in the sam

44、e way as the test lines. With the exception of the products under test, all materials used in the test rig that come into contact with the test water shall be inert for the purpose of the test. Precautions shall be taken to ensure there is no transformation or contamination of the surface of product

45、s to be tested during preparation for installation or during the installation itself. End point devices: where there are hoses or pipes for cold and hot water inlets, both shall be fed with the test water. The valves shall be set to fully open in mixed water position for the duration of the test. In

46、-line devices: where these are valves e.g. ball valves, they shall be set in half-open position. Other adjustable products shall be set accordingly or to a partially open position. The product samples shall be marked so that each sample can be identified. The manufacturer shall also disclose the sta

47、ndard operating conditions and range of process parameters of the complete plating process. 6 Operation 6.1 General The test rig shall be operated for 26 weeks under controlled conditions of water quality, temperature and flow regime. It shall be operated at a room temperature of (20 5) C and shall

48、not be thermally insulated. Temporary deviations of the temperature shall be recorded. The temperature of the test water shall be in the range from 10 C to 25 C. The test water supply shall be able to maintain a supply pressure of at least 1.5 bar over the whole period of the test. The regular daily

49、 operation of the test rig shall be automatically controlled in accordance with the flow regime shown in EN 15664-1:2008, Annex B, Table B.1. The flow rate shall be (5 0,5) l/min. For a newly built test rig, conditioning (6.2) and for in-line devices fractional sampling according to EN 15664-1 shall be carried out before using it for testing. BS EN 16058:2012EN 16058:2012 (E) 8 6.2 Conditioning A newly built rig shall be operated for a minimum of one week using free outlets for end