covers fm BRITISH STANDARD BS EN 14095 2003 Water conditioning equipment inside buildings — Electrolytic treatment systems with aluminium anodes — Requirements for performance, safety and testing Conf[.]
BRITISH STANDARD BS EN 14095:2003 Water conditioning equipment inside buildings — Electrolytic treatment systems with aluminium anodes — Requirements for performance, safety and testing The European Standard EN 14095:2003 has the status of a British Standard Confirmed November 2008 ICS 13.060.20; 91.140.60 12&23 100 µS/cm; Calcium hydrogen carbonate concentration: [Ca(HCO3)2] > 0,8 mmol/l; Phosphates and polyphosphates: < mg/l as P2O5; Continuous circulation in the hot water circuit should be verified A.2 Example of use Figure A.1 shows a type of conditioning installation in a hot water installation protected by a electrolytic water conditioning system using aluminium electrodes 12 EN 14095:2003 (E) Key Hot water distribution Test pipe Automatic air vent Manual air release Cathode (-pole) Aluminium anode Conditioning tank Anode (+pole) DC generator 10 Mains supply 11 Water-meter impulse input 12 Cathodic protection 13 Inert anode 14 15 16 17 18 19 20 21 22 23 24 25 26 Man hole Sludge drain Safety valve Mixer By-pass Circulation pump Water heating system Water supply Back flow protection Water-meter Impulse outlet Test pipe Circulation Figure A.1 Example of a hot drinking water installation protected by an electrolytic treatment system A.3 Aluminium composition The aluminium quality, which is used to manufacture the anodes is approved for contact with foodstuff, in accordance with EN 573-3 and EN 602 The maximum allowed impurities not exceed the following limits, expressed in percentage by mass (% m/rn): Total impurities: 0,5 Silicon: 0,25 Iron: 0,4 Copper: 0,05 Manganese: 0,05 Magnesium: 0,05 13 EN 14095:2003 (E) Zinc: 0,07 Titanium: 0,05 Chromium: 0,03 Nickel: 0,03 Gallium: 0,03 Vanadium: 0,03 A.4 Water analysis As the composition of the water supplied for human consumption can often fluctuate seasonally and geographically in the same mains supply, the manufacturer has to know the composition of the water which has to be conditioned The most important physical and chemical aspects are listed in A.1 The analysis shall be carried out in accordance with EN ISO 9963-1, EN ISO 10304-1, EN ISO 11885 and EN 27888 A.5 Electrolytic dissolution of aluminium In drinking water, aluminium is passivated by a thin oxide layer Thus it can only be dissolved by an applied DC current The quantity of aluminium going in suspension in hot or cold water with a pH between 6,5 and 8,5 is in accordance with Faraday's Law in which 1/96489 [C] dissolves gram equivalent of metal As the Coulomb is equal to an Ampere per second, the following equation applies: Al = 0,0932 × A × t where 3+ AI is the quantity of aluminium, in mg AL ; A is the strength of electric current, in A; t is the time, in s A.6 Maintenance The following operations should be carried out and recorded on a regular basis, at least once a year: 14 1) Analysis of the conditioned water for at Ieast aluminium, pH, oxygen, nitrites 2) Record the conditioned water consumption 3) Visual inspection of the condition of the anodes and the connections 4) Visual inspection of the sludge drain system and the drained water EN 14095:2003 (E) 5) If necessary, replacement of the anodes, cleaning and sanitization of the tank A.7 Operating and commissioning A.7.1 Assembling The anodes should be assembled in the tanks by the manufacturer or his subcontractor under the manufacturer’s responsibility A.7.2 Commissioning The installation should be commissioned by the manufacturer or his subcontractor under the manufacturer’s responsibility 15 EN 14095:2003 (E) Bibliography [1] 98/83/EC - Council Directive 98/83/EC of 3rd November 1998 relating to the quality of water intended for human consumption [2] EN 27888, Water quality - Determination of electrical conductivity (ISO 7888:1985) [3] EN ISO 9963-1, Water quality - Determination of alkalinity - Part 1: Determination of total and composite alkalinity (ISO 9963-1:1994) [4] EN ISO 11885, Water quality - Determination of 33 elements by inductively coupled plasma atomic emission spectroscopy (ISO 11885:1996) [5] EN ISO 10304-1, Water quality - Determination of dissolved fluoride, chloride, nitrite, orthophosphate, bromide, nitrate and sulfate ions, using liquid chromatography of ions - Part 1: Method for water with low contamination (ISO 10304-1:1992) [6] Report EEC - EUR 7742 - 1982 - by Dr C L KRUSE - Korrosion feuerverzinkter Stahlrohre Corrosion of hot deep zinced steel pipes [7] C.-L Kruse, Kh G SCHMITT-THOMAS, H GRÄFEN; « Korrosionsverhalten von feuerverzinktem Stahl in erwärmtem Wasser », Werkstoffe und Korrosion 34, 539-546 (1983) [8] ATEC 15/86 - 100 - Technical advice concerning the process “GULDAGER ELECTROLYSE PVI” delivered by CSTB - Champs sur Marne – France (1986) [9] Ch PETIT; « Utilisation d’anodes en aluminium pour le conditionnement anticorrosion et antitartre dans les réseaux d’eau chaude sanitaire » Acte des journées information eau Poitiers - France, conférence n° 57, tome II, (1994) [10] Planung und Ausführung von Sanitäranlagen in öffentlichen Gebäuden (Sanitärbau 95), Aufgestellt und herausgegeben vom Arbeitskreis Maschinen-und Elektrotechnik staatlicher und kommunaler Verwaltungen (AMEV), Bonn –Deutschland 1995 [11] J Ehreke; “Vergleichende Untersuchungen an verzinkten Stahlrohren mit und ohne ElektrolyseSchutzverfahren”, Material and Corrosion 48, 388-391 (1997) [12] ATEC 19/98-12 - Technical advice concerning the process « GULDAGIL PVI » delivered by CSTB – Marne la Vallée - France (1998) [13] U Ruhrberg, U Heinzelmann; “Korrosionsinnenschutz von Rohrleitungen durch das ElektrolyseVerfahren”, Kapitel 5-4.3 im Handbuch; Korrosionsschutz durch Beschichtungen und Überzüge auf Metallen, WEKA-Fachverlag (1999) 16 blank BS EN 14095:2003 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover Tel: +44 (0)20 8996 9000 Fax: +44 (0)20 8996 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services Tel: +44 (0)20 8996 9001 Fax: +44 (0)20 8996 7001 Email: orders@bsi-global.com Standards are also available from the BSI website at http://www.bsi-global.com In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service Various BSI electronic information services are also available which give details on all its products and services Contact the Information Centre Tel: +44 (0)20 8996 7111 Fax: +44 (0)20 8996 7048 Email: info@bsi-global.com Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards For details of these and other benefits contact Membership Administration Tel: +44 (0)20 8996 7002 Fax: +44 (0)20 8996 7001 Email: membership@bsi-global.com Information regarding online access to British Standards via British Standards Online can be found at http://www.bsi-global.com/bsonline Further information about BSI is available on the BSI website at http://www.bsi-global.com Copyright Copyright subsists in all BSI publications BSI also holds the copyright, in the UK, of the publications of the international standardization bodies Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means – electronic, photocopying, recording or otherwise – without prior written permission from BSI BSI 389 Chiswick High Road London W4 4AL This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained Details and advice can be obtained from the Copyright & Licensing Manager Tel: +44 (0)20 8996 7070 Fax: +44 (0)20 8996 7553 Email: copyright@bsi-global.com