EN-26-1997-AC,A1,A2,A3.pdf
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1、EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 26:1997/A3 October 2006 ICS 91.140.65 English Version Gas-fired instantaneous water heaters for the production of domestic hot water, fitted with atmospheric burners Appareils de production instantane deau chaude pour usages sanitaires quips de br
2、leurs atmosphriques utilisant les combustibles gazeux Gasbeheizte Durchlauf-Wasserheizer fr den sanitren Gebrauch mit atmosphrischen Brennern This amendment A3 modifies the European Standard EN 26:1997; it was approved by CEN on 4 September 2006. CEN members are bound to comply with the CEN/CENELEC
3、Internal Regulations which stipulate the conditions for inclusion of this amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN m
4、ember. This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are
5、the national standards bodies of Austria, Belgium, 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 Un
6、ited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 26:1997/A
7、3:2006: E -,-,- EN 26:1997/A3:2006 (E) 2 Foreword This document (EN 26:1997/A3:2006) has been prepared by Technical Committee CEN/TC 48 “Domestic gas-fired water heaters”, the secretariat of which is held by AFNOR. This Amendment to the European Standard EN 26:1997 shall be given the status of a nat
8、ional standard, either by publication of an identical text or by endorsement, at the latest by April 2007, and conflicting national standards shall be withdrawn at the latest by April 2007. This amendment includes requirements relative to the metallic, plastic and other non-metallic materials that a
9、re used in water heaters and which come into contact with water intended for human consumption. It is intended to ensure that products of this kind complying with these requirements meet current technological development and requirements which will result from the application of the EAS (European Ap
10、proval Scheme) of the European Commission, with regard to the service life of water heaters and their physiological suitability. NOTE As long as no European regulations are enforced (EAS) national regulations stay in force. According to the CEN/CENELEC Internal Regulations, the national standards or
11、ganizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
12、Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. -,-,- EN 26:1997/A3:2006 (E) 3 6.1.2 Materials Add a new subclause header “6.1.2.1 General”. Replace the last paragraph with the following text: “6.1.2.2 Metallic materials 6.1.2.2.1 Corrosion resistance Provided that the water heate
13、r is used in accordance with the manufacturers instructions: the functioning of components manufactured from corrosion-resistant metallic materials shall not be affected by corrosion within the expected service life of the water heater, and no special maintenance shall be required to keep the compon
14、ents in good working order. 6.1.2.2.2 Requirements Materials that come into contact with water intended for human consumption shall withstand the mechanical, chemical and thermal stresses to which they are exposed during the service life of the water heater and shall not contaminate the water suppli
15、ed. Metallic materials shall be corrosion-resistant. Metallic materials are considered to satisfy the requirements with respect to corrosion protection: if the material used is enamelled (one or more layers) and equipped with cathodic corrosion protection, or where types of stainless steel containin
16、g a minimum of 16 % chrome are used, or where they are assessed as acceptable to the national regulations in force. Examples for the selection of metallic materials (steel, copper and copper alloys) are given in P.2 and P.3. 6.1.2.3 Non-metallic materials 6.1.2.3.1 Plastic materials Due to the many
17、different types of plastic in components used in the drinking water sector, many different material properties need to be taken into consideration e.g. longitudinal expansion, joining and fixing techniques, temperature effects, effect of light (UV resistance), ageing, internal pressure, internal and
18、 external corrosion (for example as a result of using cleaning products) and also transport and storage conditions. 6.1.2.3.2 Requirements of plastic materials In the manufacture of water heaters and their components, only those plastic materials that meet mechanical, chemical and thermal demands as
19、 well as physiological and hygiene requirements throughout the life of the equipment shall be used in contact with water intended for human consumption. This means they shall be suitable for coming into direct contact with food and not pose any health threat. Special attention shall be paid to the m
20、icrobiological properties of the plastic materials used and to the prevention of substances leaching out. Examples for the selection of the plastic materials are given in P.4. -,-,- EN 26:1997/A3:2006 (E) 4 6.1.2.3.3 Other non-metallic operating and auxiliary materials These materials include rubber
21、, sealant, adhesives and also lubricants on moving parts that come into contact with the water intended for human consumption. These materials shall satisfy the physiological and hygiene requirements in force. Their use is to be limited to what is technically necessary.” -,-,- EN 26:1997/A3:2006 (E)
22、 5 Add the following Annex P: ANNEX P (informative) Examples of materials currently used P.1 General Materials in compliance with the requirements of the enforced national regulations (e.g. ACS, ATA, KTW, WRC, ) are deemed to satisfy the requirements of the present amendment. P.2 Special types of st
23、eel Table P.1 Special types of steel Material reference Abbreviation 1.4571 X6CrNiMoTi 17 12 2 1.4435 X2CrNiMo 18 14 3 1.4539 X2NiCrMoCu 25 20 5 1.4462 X2CrNiMoN 22 5 P.3 Copper and copper alloys Table P.2 Copper and copper alloys Material Material reference Abbreviation Copper 2.0090 SF-Cu Copper-N
24、ickel alloy 2.0872 CuNi10Fe1Mn Copper-Zinc alloys 2.0401 2.0402 2.0340.02 2.0340.05 2.0290.01 CuZn39Pb3 CuZn40Pb2 GK-CuZn37Pb GD-CuZn37Pb G-CuZn33Pb Copper-Tin-Zinc alloys 2.1096.01 G-CuSn5ZnPb Copper-Tin alloys 2.1020 CuSn6 -,-,- EN 26:1997/A3:2006 (E) 6 P.4 Plastic materials Table P.3 Plastic mate
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