1、PUBLISHED DOCUMENT Chemicals used for treatment of water intended for human consumption Guidelines for the purchase of products ICs 71.100.80 PD CR 14269:2001 WkNb A%“ U- rn% E rn NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW $ present to the responsible European committee a
2、ny 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. - A list of organizations represented on this committee can be obtained on request to its secretary. Additional info
3、rmation The title has been modified to include the words ofproducts, which were missing from the final text issued by CEN. The error has been notified to CEN. Cros s-r e ferenc es The British Standards which implement international or European publications referred to in this document may be found i
4、n 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 Stan dards Online. This publication does not purport to include all the necessary provisions of a contract. Users of this pub
5、lication are responsible for its correct application. Compliance with a British Standard does not ofitself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the CRtitle page, pages 2 to 14, an inside back cover and a back cover. Th
6、e BSI copyright date displayed in this document indicates when the document was last issued. O BSI 30 May 2002 ISBN O 580 39759 9 CEN REPORT RAPPORT CEN CEN BERICHT CR 14269 August 2001 ICs English version Chemicals used for treatment of water intended for human consumption - Guidelines for the purc
7、hase This CEN Report was approved by CEN on 4 August 2001. It has been drawn up by the Technical Committee CENTTC 164. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwa
8、y, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMIT EUROPEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwid
9、e for CEN national Members. Ref. No. CR 14269:2001 E CR 14269:2001 (E) Contents Foreword 3 Introduction . 4 1 Scope 5 2 Normative references 5 3 Terms and definitions 5 4 General Considerations 6 5 Assessment of the suitability of a supplier of water treatment chemicals 7 5.1 General 7 5.2 Product m
10、anufacturing process and general product information 7 5.3 Product supplier reference . 8 5.4 Product and process quality assurance systems 8 5.5 Product and process inspection and testing 9 5.6 Product handling, storage. packing and despatch 9 5.8 Delivery and post delivery product issues 10 5.7 Pr
11、oduct transport . IO Annex A (normative) Complementary requirements for purchase of filtering materials 12 A.l General 12 Source of supply 12 Particle size distribution . 12 Interstitial volume (voidage) . 12 A.6 Mechanical strength 12 A.8 Leachable impurities . 13 A.2 A.3 A.4 AS A.7 Basis of purcha
12、se 13 Bibliography 14 Choice of filter material . 12 2 CR 14269:2001 (E) Foreword This CEN Report has been prepared by CEN/TC 164, “Water supply“, the secretariat of which is held by AFNOR. 3 CR 14269:2001 (E) I nt rod uction A series of European Standards for chemicals used for treatment of water i
13、ntended for human consumption has been prepared taking into account that no product should contain any contaminating, inorganic or organic substances in quantities that could cause deterioration in the quality of drinking water that has been correctly treated with the product. A range of important i
14、ssues, beyond the scope of these European Standards, should be considered by a water supply undertaker before entering into a contract with a particular supplier of water treatment chemicals. These issues, which are the subject of this European Standard, will include an assessment of the chemical su
15、ppliers competence, contract conditions, chemical quality monitoring strategy and procedures for product acceptance and rejection. It is for the purchaser to decide which of these issues should be included in the preparation of their own checklists and contract documents. 4 CR 14269:2001 (E) 1 Scope
16、 This CEN Report gives guidance on the use of European Standards for chemicals used for treatment of water intended for human consumption and it is intended to assist a purchaser of such chemicals to identify factors that shall be considered, developed and included in a water supply undertakers proc
17、urement policy. 2 Normative references This CEN Report incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to
18、or revisions of any of these publications apply to this CEN Report only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 12902, Products used for treatment of water intended for human consump
19、tion - Inorganic supporting and filtering materials - Methods of test. 3 Terms and definitions For the purposes of this CEN Report, the following terms and definitions apply: 3.1 agent organisation appointed by a supplier to sell a product on a commission basis NOTE An agent does not have ownership
20、of the product 3.2 distributor organisation which is formally appointed by a supplier to buy stock and resell all or part of the suppliers product range NOTE 1 The distributor can operate within defined geographical areas, use sectors, and load size limitation for delivery. NOTE 2 organisation with
21、whom a close liaison will exist. The supplier can be a manufacturer, can supply in part, purchase for resale and can also have his own direct sales NOTE 3 A distributor takes ownership of the product in contrast to an agent who does not. 3.3 batch quantity of finished product produced in a batch pro
22、cess at one time NOTE to talk in terms of a lot. In a continuous or semicontinuous process the concept of a batch, as defined above, does not apply and it is usual 3.4 certificate of analysis document stating the actual test results obtained by analysing a representative sample drawn from the produc
23、t to be delivered 3.5 certificate of conformity document that testifies to conformity to a specification NOTE 1 treatment of water intended for human consumption but a purchaser can request a supplier to provide this document. The provision of a certificate of conformity is not a requirement of the
24、European Standards for chemicals used for 5 CR 14269:2001 (E) NOTE 2 A certificate of conformity does not imply that the actual material delivered has been tested, but it confirms that all the material from which the delivery has been made up has at some stage been tested and inspected according to
25、the requirements of the established quality system. 3.6 contract any type of agreement, preferably written between the supplier and the customer NOTE The use of a written contract is essential for all issues affecting product quality, security of supply and cost. 3.7 lot quantity of chemical from wh
26、ich a representative sample is available NOTE An example of a lot is a quantity of chemical drummed off or packed out from a bulk tank or storage silo. 3.8 process any operation which intentionally changes the performance, chemical nature, physical form or composition of the product 3.9 purchaser or
27、ganisation which enters into a contract with a supplier and is generally referred to as the customer 3.10 representative sample sample taken in accordance with a defined procedure in order to obtain information on the batch or lot NOTE customer. Where applicable this should assure the homogeneity of
28、 the whole or part of the lot as agreed with the 3.1 1 specification precise statement, or set of requirements (quantities, characteristics and/or properties) to be satisfied by a material, process or product with an indication of the test methods used 3.12 subcontractor any provider of goods or ser
29、vices to the supplier NOTE Examples of such services are: raw materials, toll manufacturing, test laboratory facilities, transport, storage. 3.13 supplier organisation which has entered into a contract with a customer to provide a product in accordance with previously established specifications and
30、in compliance with a formal quality system 3.14 toll manufacturer sub-contractor who undertakes the whole or a prescribed part of the suppliers manufacturing process 4 General Considerations Chemicals used for the treatment of water intended for human consumption shall conform to the relevant Europe
31、an Standard. Purchasers of water treatment chemicals shall confirm that potential suppliers are aware of the appropriate European Standard and can demonstrate that they are capable of conforming to it. The issues identified in this European Standard shall be considered for inclusion in the purchaser
32、s procurement policy. The resulting purchaser contract conditions shall then be discussed and agreed with the supplier prior to negotiating the unit cost of the required product and agreeing to enter into a formal contract. 6 CR 14269:2001 (E) The purchaser shall formally notify potential suppliers
33、that the product will be used in the treatment of water for human consumption and that full conformity to the requirements of the appropriate European Standard is the minimum expectation. In special circumstances purchasers can require more stringent quality requirements to be achieved. Purchasers s
34、hall seek sufficient information from potential suppliers to be confident that products are prepared, transported and quality assured in a way that guarantees full conformity to the requirements of the relevant European Standard. Third party certification of the product concerned and of the quality
35、assurance system used by the producer can be used to assess the supplier and to improve confidence in their ability. The purchasers requirements, regarding manufacture, quality control, the right to enter premises to inspect practices and procedures, delivery of finished products and the issue of ce
36、rtificates of analysis or conformity can influence the cost of the product and shall be clearly specified in all tender and contract documentation. The purchaser shall seek sufficient information, including analytical reports, to be confident that there are no unacceptable risks to product quality.
37、This European Standard gives guidance on information that shall be sought in order to select a preferred supplier from those that are available. 5 Assessment of the suitability of a supplier of water treatment chemicals 5.1 General Information shall be sought by correspondence or, where applicable,
38、by inspection of the suppliers premises and manufacturing plant. The purchaser can select the questions that are relevant for his requirements and incorporate them in a supplier questionnaire. 5.2 Product manufacturing process and general product information 5.2.1 Purpose The purpose of this procedu
39、re is: to establish who makes the product and how it is made; and to identify whether the manufacturing process carries an unacceptable risk of producing a poor quality product. 5.2.2 Procedure 5.2.2.1 Origin of products Confirm whether the product is manufactured by the supplier. If the product is
40、not manufactured by the supplier, confirm: a) whether the product is obtained directly or through sub-contractor(s); b) the name and address of the product manufacturer; c) that the main supplier is able to demonstrate adequate control over the sub-contractors performance in all areas identified bel
41、ow. 5.2.2.2 Manufacturing process Seek assurance that: a) the product is manufactured from raw materials of appropriate and known quality, monitored by agreed methods at agreed frequencies; 7 CR 14269:2001 (E) b) procedures are in place to prevent variation in raw material quality affecting the qual
42、ity of the finished product; c) process conditions are adequately defined, monitored and controlled to achieve consistent finished product quality. Establish whether other products are manufactured on site. 5.2.2.3 Product handling Seek assurance that: a) adequate precautions are taken to minimise r
43、isk of crosscontamination of products (a list of other products shall be provided); b) adequate precautions are taken to prevent the product from being wrongly labelled, wrongly packaged or wrongly loaded onto transport vehicles. 5.3 Product supplier reference 5.3.1 Purpose The purpose of this proce
44、dure is to establish that the supplier can demonstrate the ability to supply products of acceptable quality. 5.3.2 Procedure Seek to establish whether the supplier has ever supplied products of inferior quality to a purchaser. Has the supplier revised manufacturing and supply procedures adequately t
45、o prevent future problems? Establish whether the supplier has supplied the required product to the purchaser in the past. Does previous experience confirm adequate competence and performance? Establish whether the supplier can provide references of other water suppliers who have purchased the requir
46、ed product. Does their experience with the supplier confirm adequate competence and performance? Establish whether the supplier can provide references of other industries who purchased the required product. Does their experience with the supplier confirm adequate competence and performance? 5.4 Prod
47、uct and process quality assurance systems 5.4.1 Purpose The purpose of this procedure is to establish, either directly or through third party assessment, that the supplier uses quality control procedures to ensure that the quality of the finished product conforms at all times to the requirements of
48、the agreed product specification and the appropriate European Standard. 5.4.2 Procedure Confirm that there is an accountable person responsible for quality assurance within the suppliers company. Confirm that the supplier has well defined and documented policies and objectives regarding product qual
49、ity control. Confirm that the suppliers procedures make reference to all requirements of the appropriate European Standard. Identify the suppliers commitment to quality assurance through accreditation or award of relevant European or national standards; for example the EN IS0 9000 series is a means of verifying commitment to quality assurance. Confirm that the supplier can demonstrate that its quality control procedures are implemented, maintained in an up- to-date condition, regularly reviewed and revised when necessary. It is anticipated that the cu
