1、ICS 71.100.80Chemicals used for treatment of water intended forhuman consumptionPhosphoric acidEnglish version of DIN EN 974Produkte zur Aufbereitung von Wasser fr den menschlichenGebrauch PhosphorsureEuropean Standard EN 974 : 2003 has the status of a DIN Standard.A comma is used as the decimal mar
2、ker.National forewordThis standard has been prepared by CEN/TC 164 Water supply (Secretariat: France).The responsible German body involved in its preparation was the Normenausschuss Wasserwesen (WaterPractice Standards Committee), Technical Committee Wasseraufbereitung.Users of this standard should
3、note that national regulations exist in Germany dealing with the characteristicsand treatment of water for human consumption, such as the Lebensmittel- und Bedarfsgegenstndegesetz(German Foodstuffs Act) and the Verordnung zur Novellierung der Trinkwasserverordnung (GermanRegulation amending the Germ
4、an Drinking Water Regulation).AmendmentsThis standard differs from the December 1997 edition in that the specifications have been harmonized withthose given in EU Directive 98/83/EC and references have been updated.Previous editionDIN EN 974: 1997-12.National Annex NADocuments referred to(and not in
5、cluded in Normative references and Bibliography)Verordnung zur Novellierung der Trinkwasserverordnung (German Regulation amending the German DrinkingWater Regulation), as of 21 May 2001, BGBl. (German Federal Law Gazette) I, No. 24, p. 959980Lebensmittel- und Bedarfsgegenstndegesetz, as of 9 Septemb
6、er 1997, BGBl. I, No. 63, pp. 22962319DEUTSCHE NORM January 2004DIN EN 974 No part of this standard may be reproduced without the prior permission ofDIN Deutsches Institut fr Normung e.V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Norm
7、en).Supersedes December 1997edition.English price group 11www.din.dewww.beuth.de9549024Continued overleaf.Document comprises 20 pages.04.04G4G15G60G96G30G5English versionICS 71.100.80Chemicals used for treatment of water intended forhuman consumptionPhosphoric acid 2003. CEN All rights of exploitati
8、on in any form and by any meansreserved worldwide for CEN national members.Ref. No. EN 974 : 2003 EProdukte zur Aufbereitung von Was-ser fr den menschlichen Gebrauch PhosphorsureThis European Standard was approved by CEN on 2003-09-12.CEN members are bound to comply with the CEN/CENELEC Internal Reg
9、ulationswhich stipulate the conditions for giving this European Standard the status of anational standard without any alteration.Up-to-date lists and bibliographical references concerning such national stand-ards may be obtained on application to the Management Centre or to anyCEN member.The Europea
10、n Standards exist in three official versions (English, French, German).A version in any other language made by translation under the responsibility of aCEN member into its own language and notified to the Management Centre hasthe same status as the official versions.CEN members are the national stan
11、dards bodies of Austria, Belgium, the CzechRepublic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland,Ireland, Italy, Luxembourg, Malta, the Netherlands, Norway, Portugal, Slovakia,Spain, Sweden, Switzerland, and the United Kingdom.EN 974October 2003Management Centre: rue de Stassart 36,
12、B-1050 BrusselsEuropean Committee for StandardizationComit Europen de NormalisationEuropisches Komitee fr NormungProduits chimiques utiliss pour le trai-tement de leau destine la consom-mation humaine Acide phosphoriqueSupersedes EN 974 : 1997.Page 2EN 974 : 2003Page33444671315161719Page 3EN 974 : 2
13、003Page 4EN 974 : 2003Page 5EN 974 : 2003Page 6EN 974 : 2003Page 7EN 974 : 2003Page 8EN 974 : 2003Page 9EN 974 : 2003Page 10EN 974 : 2003Page 11EN 974 : 2003Page 12EN 974 : 2003Page 13EN 974 : 2003Page 14EN 974 : 2003Page 15EN 974 : 2003Page 16EN 974 : 2003Page 17EN 974 : 2003Page 18EN 974 : 2003Page 19EN 974 : 2003
