SIST EN 15664-1:2008
(Main)Influence of metallic materials on water intended for human consumption - Dynamic rig test for assessment of metal release - Part 1: Design and operation
Influence of metallic materials on water intended for human consumption - Dynamic rig test for assessment of metal release - Part 1: Design and operation
This European Standard specifies a procedure to determine the release of metals from metallic materials used in construction products intended to come into contact with drinking water .
The test can be used for three purposes:
a) Assess a material as a reference material for a category of materials using the results of several investigations in different waters covering a broad range of water compositions.
b) Assess a material for approval by way of comparative testing.
c) Obtain data on the interaction of local water with a material.
Einfluss metallischer Werkstoffe auf Wasser für den menschlichen Gebrauch - Dynamischer Prüfstandversuch für die Beurteilung der Freisetzung von Metallen - Teil 1: Auslegung und Betrieb
Diese Europäische Norm legt ein Verfahren zur Bestimmung der Freisetzung von Metallen aus metallischen Werkstoffen fest, die in Bauprodukten verwendet werden, die für den Kontakt mit Trinkwasser ) vorgesehen sind.
Der Versuch kann zu drei Zwecken angewendet werden:
a) Ein Werkstoff ist als Bezugswerkstoff für eine bestimmte Werkstoffkategorie zu beurteilen, wobei die Ergebnisse mehrerer Untersuchungen verschiedener Wässer anzuwenden sind, die einen breiten Bereich von Wasserzusammensetzungen abdecken.
b) Ein Werkstoff ist durch Vergleichsprüfungen auf die Annahmetauglichkeit zu beurteilen.
Es sind Daten zur Wechselwirkung des lokalen Wassers mit einem Werkstoff zu bestimmen
Influence des matériaux métalliques sur l'eau destinée à la consommation humaine - Banc d'essai dynamique pour l'évaluation de l'émission de métaux - Partie 1: Conception et fonctionnement
La présente Norme européenne spécifie un mode opératoire pour déterminer l'émission de métaux à partir de matériaux métalliques employés dans des produits de construction destinés à entrer en contact avec de l'eau potable1) .L'essai peut être utilisé pour trois buts :
a) Évaluer un matériau comme matériau de référence pour une catégorie de matériaux en utilisant les résultats de plusieurs investigations dans différentes eaux couvrant une large gamme de compositions de l'eau.
b) Évaluer un matériau en vue de son approbation au moyen d'essais comparatifs.
c) Obtenir des données sur l'interaction de l'eau locale avec un matériau.
Vpliv kovinskih materialov na pripravo pitne vode - Dinamično preskuševališče za ocenjevanje izločanja kovin - 1. del: Načrtovanje in delovanje
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Influence of metallic materials on water intended for human consumption - Dynamic rig test for assessment of metal release - Part 1: Design and operationInfluence des matériaux métalliques sur l'eau destinée à la consommation humaine - Banc d'essai dynamique pour l'évaluation de l'émission de métaux - Partie 1: Conception et fonctionnementEinfluss metallischer Werkstoffe auf Wasser für den menschlichen Gebrauch - Dynamischer Prüfstandversuch für die Beurteilung der Freisetzung von Metallen - Teil 1: Auslegung und BetriebTa slovenski standard je istoveten z:EN 15664-1:2008SIST EN 15664-1:2008en,fr,de67.25013.060.20ICS:SLOVENSKI
STANDARDSIST EN 15664-1:200801-april-2008
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15664-1January 2008ICS 13.060.20; 67.250 English VersionInfluence of metallic materials on water intended for humanconsumption - Dynamic rig test for assessment of metal release- Part 1: Design and operationInfluence des matériaux métalliques sur l'eau destinée à laconsommation humaine - Banc d'essai dynamique pourl'évaluation de l'émission de métaux - Partie 1: Conceptionet fonctionnementEinfluss metallischer Werkstoffe auf Wasser für denmenschlichen Gebrauch - Dynamischer Prüfstandversuchfür die Beurteilung der Freisetzung von Metallen - Teil 1:Auslegung und BetriebThis European Standard was approved by CEN on 28 October 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15664-1:2008: E
EN 15664-1:2008 (E) 2 Contents Page Foreword.4 Introduction.5 1 Scope.6 2 Normative references.6 3 Terms and definitions.7 4 Principle.9 5 Test rig.9 5.1 General.9 5.2 Test rig arrangement.9 5.3 Control line.10 5.4 Test lines.10 5.4.1 General.10 5.4.2 Materials in the form of pipes.10 5.4.3 Materials in the form of test pieces.10 5.5 Reference lines for comparative testing.10 6 Operating conditions.10 6.1 General.10 6.2 Conditioning.11 6.3 Fractional Sampling.11 6.3.1 General.11 6.3.2 Calculation and expression of results for fractional sampling.11 6.3.3 Requirements for the hydraulic function of the test rig.13 6.3.4 Determination of sampling volumes.13 6.4 Normal operation of the test rig.14 7 Test water.14 7.1 Composition.14 7.2 Check of test water.14 8 Sampling.15 8.1 General.15 8.2 Test water sampling.15 8.3 Sampling to determine metal release.15 8.4 Sampling volumes.16 8.4.1 General.16 8.4.2 Test lines with test pieces.16 8.4.3 Test pipes.16 9 Analysis.16 10 Expression of results.16 10.1 Metal concentrations after fixed stagnation time.16 10.2 Equivalent pipe concentration.17 10.3 Mean concentration after a given operating time.17 10.4 Presentation of the test results.17 11 Test report.18 Annex A (normative).19 Test rig components and assembly.19 A.1 Test rig.19
EN 15664-1:2008 (E) 3 A.2 Test piece.21 A.3 Connecting piece.21 Annex B (normative).23 Test rig flow regime.23 B.1 Test rig flow regime and sampling plan (24 h cycle).23 B.2 Test rig flow regime and sampling plan for 16 h stagnation time.25 Annex C (normative).26 Test water monitoring and analysis.26 C.1 Data on test water composition.26 Annex D (informative).28 Example of graphs for expression of results.28 Bibliography.31
EN 15664-1:2008 (E) 4 Foreword This document (EN 15664-1:2008) 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 latest by July 2008, and conflicting national standards shall be withdrawn at the latest by July 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject 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. The standard has been prepared under the mandate given to CEN by the Commission of the European Communities and the European Free Trade Area and supports essential requirements of the relevant EC-Directives. With respect to potential adverse effects on the quality of water intended for 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 as the definition given at Article 2(1) of the Council Directive 98/83/EC on the quality of water intended for human consumption. This European Standard has been drafted in accordance with the CEN Internal Regulations, Part 3. This European Standard is Part 1 of a series dealing with the test method to determine the release of metals from metallic products into drinking water comprising: — Part 1: Design and operation
— Part 2: Test waters — Part 3: Guidance on interpretation of results. Part 1 describes a test method to produce contact waters for the assessment of metal release from metallic materials. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 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 and the United Kingdom.
EN 15664-1:2008 (E) 5 Introduction The main application of metallic materials in water supply is within the domestic installation. The test method given in this standard is designed to provide information on metal release over time from metallic materials into drinking water.
The test is based on a programme of alternating periods of once-through flow and stagnation in a rig, simulating the conditions in a domestic distribution system.
The test conditions are more relevant than conditions of continuous through-flow or sit and soak tests and are applicable to all metallic materials in distribution systems. Internal corrosion of metallic products in water conveying systems generally leads to the build-up of layers, which might or might not be protective. The factors influencing corrosion are described in EN 12502-1. Type and rate of the production of corrosion products and the rate of metal release can depend on: • characteristics of the metallic material;
• characteristics of the water;
• design and construction;
• pressure testing and commissioning;
• operating conditions and duration of operation. Corrosion product layers begin to form as soon as a metallic material comes into contact with water. Their properties depend on the factors noted above and for a given water/material combination especially on the operating conditions. It is not possible to reproduce the conditions of an actual installation in tests by constant once-through flow or circulation of water. The flow regime (3.16) used in this test simulates the operating conditions in domestic drinking water installations where stagnation times of water considerably exceed the times of through-flow. An assessment by testing is possible only if the influence of the flow regime (3.16) and the operation period (3.19) is taken into consideration. A compilation of data is needed, which has been determined under defined conditions over a prolonged period of time. In most cases, metal release decreases with operation time. For some alloying elements and impurities, however, an increase in their release can be observed.
EN 15664-1:2008 (E) 6 1 Scope This European Standard specifies a procedure to determine the release of metals from metallic materials used in construction products intended to come into contact with drinking water1. The test can be used for three purposes: a) Assess a material as a reference material for a category of materials using the results of several investigations in different waters covering a broad range of water compositions. b) Assess a material for approval by way of comparative testing. c) Obtain data on the interaction of local water with a material. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1484, Water analysis — Guidelines for the determination of total organic carbon (TOC) and dissolved organic carbon (DOC) EN 10088-1, Stainless steels — Part 1: List of stainless steels EN 12502-1:2004, Protection of metallic materials against corrosion — Guidance on the assessment of corrosion likelihood in water distribution and storage systems — Part 1: General EN 25813, Water quality — Determination of dissolved oxygen — Iodometric method (ISO 5813:1983) EN 25814, Water quality — Determination of dissolved oxygen — Electrotechnical probe method (ISO 5814:1990) EN 27888, Water quality — Determination of electrical conductivity (ISO 7888:1985) EN ISO 6878, Water quality — Determination of phosphorus — Ammonium molybdate spectrometric method (ISO 6878:2004) EN ISO 8044:1999, Corrosion of metals and alloys — Basic terms and definitions (ISO 8044:1999) EN ISO 9963-1, Water quality — Determination of alkalinity — Part 1: Determination of total and composite alkalinity (ISO 9963-1:1994) EN ISO 10304-1, Water quality — Determination of dissolved fluoride, chloride, nitrite, orthophosphate, bromide, nitrate and sulphate ions, using liquid chromatography of ions — Part 1: Method for water with low contamination (ISO 10304-1:1992) EN ISO 11885, Water quality — Determination of 33 elements by inductively coupled plasma atomic emission spectroscopy (ISO 11885:1996)
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 European Communities. 3 November 1998.
EN 15664-1:2008 (E) 7 EN ISO 14911, Water quality — Determination of dissolved Li+, Na+, NH4+, K+, Mn2+, Ca2+, Mg2+, Sr2+ and Ba2+ using ion chromatography — Method for water and waste water (ISO 14911:1998) EN ISO 15586 Water quality — Determination of trace elements using atomic absorption spectrometry with graphite furnace (ISO 15586:2003) EN ISO 17294-2, Water quality — Application of inductively coupled plasma mass spectrometry (ICP-MS) — Part 2: Determination of 62 elements (ISO 17294-2:2003) ISO 6058, Water quality — Determination of calcium content — EDTA titrimetric method ISO 6059, Water quality — Determination of the sum of calcium and magnesium — EDTA titrimetric method ISO 9297, Water quality — Determination of chloride — Silver nitrate titration with chromate indicator (Mohr's method) ISO 9964-3, Water quality — Determination of sodium and potassium — Part 3: Determination of sodium and potassium by flame emission spectrometry ISO 10523, Water quality — Determination of pH 3 Terms and definitions For the purposes of this European standard the terms and definitions given in EN ISO 8044:1999, EN 12502-1:2004 and the following apply. 3.1 test rig assembly of test lines, control lines and where necessary reference lines together with test water inlet and discharge arrangements, see Annex A, Figure A.1 3.2 line continuous part between a check valve and the corresponding flow regulator 3.3 control line line containing a single length of pipe made of an inert material for the purposes of the test 3.4 test line line containing test pieces or a test pipe 3.5 reference line line containing test pieces each made of the same reference material or line containing a single length of pipe made of a reference material 3.6 dummy lines pipes made of an inert material for the purposes of the test used for the conditioning run of a newly built test rig 3.7 test pipe specimen that is representative of a construction product in the form of a pipe for use with drinking water in terms of material composition and surface characteristics
EN 15664-1:2008 (E) 8 3.8 test piece specimen that is representative of a construction product, which is not a pipe, for use with drinking water in terms of material composition, see Annex A, clause A.2 3.9 category group of materials with the same metal release characteristics in respect of their application in products and behaviour in contact with drinking water 3.10 reference material metallic material of a tightly defined composition for which the characteristics of metal release into drinking water are known and reproducible, and are accepted for a category 3.11 surface characteristics aspects of the surface of a product exposed to the water, which are derived from the production process 3.12 local water water from a particular supply zone
3.13
test water water used for testing purposes
3.14 contact water test water which has been in contact with a test line
3.15 control water test water which has been in contact with the control line
3.16 flow regime consecutive alternating periods of flow, at a given flow rate, and stagnation of the test water in the test rig 3.17 representative water sample continuous column of water in the test line containing released corrosion products from the test pieces or test pipe uninfluenced by the remainder of the test rig 3.18 fractional sampling method used to check the proper hydraulic function of the rig and to determine the representative volume of the water samples 3.19 period of operation or operation period (T) period of time, expressed in weeks, during which the flow regime is operated for a particular test 3.20
stagnation time (t) period of time, expressed in hours, when the test water is static in the test rig
EN 15664-1:2008 (E) 9 3.21 run-time curve graphical representation of the relationship between the mean of the metal concentration arising from the sampling plan, MEP(T), or of the concentration after 4 hours of stagnation, over the period of operation (T) 3.22 stagnation curve graphical representation of the relationship between the measured metal concentration and the length of the stagnation time (t) at a given period of operation (T) 4 Principle Test pieces or test pipes of a material of defined geometry and given surface characteristics are installed in a test rig which is operated for a period of time under controlled conditions of water quality, temperature and flow regime. Water samples are taken at specified operation periods after specified stagnation times throughout the whole of the test and analysed for the concentrations of relevant metals.
5 Test rig 5.1 General The test rig shall be constructed in accordance with Annex A in addition to the requirements given in this clause. A test rig shall have: one line for control purposes (5.3); three identical test lines for each material submitted for testing as set out in 5.4; and three identical reference lines (see 5.5) for comparative testing. With the exception of the materials under test, all materials used in the test rig that come into contact with the test water shall be inert for the purposes of the test.
Precautions shall be taken to ensure there is no transformation or contamination of the surface of test pieces or pipes during preparation for installation or during the installation itself. The materials for testing shall be in the form of pipes or test pieces. Where the material used for testing is intended to be used for pipes and other applications, it shall be tested as a pipe. 5.2 Test rig arrangement The test rig shall be arranged in the following way for the relevant purpose: • Assess a material as a reference material for a category of materials the test rig shall comprise three test lines made up of the material under examination and a control line. The rig shall be operated in several different waters covering a broad range of water compositions (see Part 2 of this standard). • For comparative testing of materials the test rig shall comprise three test lines containing the material under examination, three reference lines containing the reference material for the category of the material under test and a control line. The rig shall be operated with one test water defined in Part 2 of this standard. • Obtain data on the interaction of local water with a material the rig shall comprise three test lines made up of the material under examination and a control line. The rig shall be operated with the local water in question. This would include, for example, the effect of water treatment on the metals under examination.
EN 15664-1:2008 (E) 10 5.3 Control line The line for control purposes shall contain a single length of pipe made of stainless steel conforming to EN 10088-1, material no. 1.4401. The pipe shall have an inner diameter of (13 ± 1) mm. 5.4 Test lines 5.4.1 General A test rig shall have three identical test lines for each material.
5.4.2 Materials in the form of pipes Each line shall include a single length of test pipe as shown in Annex A, Figure A.3. Pipes shall have an inner diameter of (13 ± 1) mm. Where this diameter is not available then the next larger commercially available size shall be used. The test pipes shall be marked with the name of the manufacturer, identification of the material and the date of manufacture. When testing pipes by comparative testing, the inner pipe diameter shall be the same for both the candidate material and the reference material. 5.4.3 Materials in the form of test pieces Each test line shall consist of five test pieces connected by pipes as shown in Annex A, Figure A.2. All five test pieces in one test line shall be representative of one material. The internal surface which is exposed to the test water shall have a length of (100 ± 1) mm and a diameter of (17 ± 0,3) mm. The sections of pipe and the pipe connections between the individual test pieces shall be of stainless steel, conforming to EN 10088-1, material no. 1.4401. Pipes shall have an inner diameter (13 ± 1) mm. Connecting pieces shall be in the form defined in Annex A. The test pieces and the pipe sections shall be equi-potentially bonded.
The test pieces shall be marked with the name of the manufacturer, identification of the material and the date of manufacture. 5.5 Reference lines for comparative testing When the test rig is used for comparative testing it shall contain reference lines in addition to the test lines (see 5.4.2 and 5.4.3):
• three reference lines when testing materials in the form of pipes;
• three reference lines each containing five test pieces made of the reference material, when testing materials for other forms. 6 Operating conditions 6.1 General The test rig shall be operated at a room temperature of (20 ± 5) °C and shall not be thermally insulated. Temporary deviations of the temperature shall be recorded. The water supply shall be able to maintain a supply pressure of at least 3 bar over the whole period of the test. The test water shall have a pressure between 3 bar and 5 bar upon entering the test rig.
For a newly built test rig, conditioning (6.2) and fractional sampling (6.3) shall be carried out before using it for testing. After changes of the test rig, which may influence its hydraulic properties, repeat fractional sampling.
EN 15664-1:2008 (E) 11 Before beginning the operation period, the test rig shall be flushed using test water for 1 h at a flow rate of (5 ± 0.5) l/min. 6.2 Conditioning In order to test the proper function of the components used and flush the system, a newly built rig shall be operated for a minimum of one week using dummy lines in the place of test lines and reference lines. 6.3 Fractional Sampling
6.3.1 General Fractional sampling shall be carried out in order to: • Check the proper hydraulic function of the test rig; • Demonstrate the sampling conditions are appropriately controlled; and
• Determine the sampling volumes. This procedure shall be carried out once with a single test line. The results remain valid for any further tests carried out using the same equipment and test pipes and test pieces having identical geometrical dimensions.
The test line shall include five test pieces as shown in Annex A Figure A.2. The two outer and the middle test pieces shall be made of materials of high metal release rates (e.g. Pb, Cu) while the two other test pieces shall consist of an inert material for the purposes of the test.
The test line shall be operated for a minimum of one week before starting the fractional sampling procedure. After a minimum of 2 h stagnation, n samples of (30 ± 10) mL volume shall be taken sequentially until a total volume of not less than 1500 mL has been collected.
For each fraction j, the volume vf(j) shall be determined and the concentrations cf(j) of the chosen element shall be analysed.
NOTE The choice of the appropriate element for this procedure depends on the selected material. More than one element can be analysed when appropriate. 6.3.2 Calculation and expression of results for fractional sampling For each fraction j, calculate the cumulated flushed volume V(j) according to equation 1: ∑=+×−=jifijjV1f)(v)(v2/1)(, for j = 1 to n
(1) where n = total number of samples; vf(j) = volume (ml) of fraction j; vf(i) = volume (ml) of fraction i,
for 1 ≤ i ≤ j. The cumulated flushed volume V(n) of the last fraction sampled shall be at least 1 500 mL. The measured concentrations cf(j) shall be plotted over the cumulated flushed volume V(j) as shown in Figure 1.
EN 15
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