1、BRITISH STANDARDBS EN 14453:2005Devices to prevent pollution by backflow of potable water Pipe interrupter with permanent atmospheric vent DN 10 to DN 20 Family D, type CThe European Standard EN 14453:2005 has the status of a British StandardICS 13.060.20; 23.060.50g49g50g3g38g50g51g60g44g49g42g3g58
2、g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14453:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 25 January 2
3、006 BSI 25 January 2006ISBN 0 580 47600 6National forewordThis British Standard is the official English language version of EN 14453:2005. It supersedes BS 6281-3:1982 which is withdrawn.The UK participation in its preparation was entrusted by Technical Committee B/504, Water supply, to Subcommittee
4、 B/504/14, Backflow prevention, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European
5、developments and promulgate them in the UK.A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue
6、under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct a
7、pplication.Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 16, an inside back cover and a back cover.The BSI copyright notice displayed in this doc
8、ument indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14453May 2005ICS 13.060.20; 23.060.50English versionDevices to prevent pollution by backflow of potable water - Pipeinterrupter with permanent
9、atmospheric vent DN 10 to DN 20 -Family D, type CDispositifs de protection contre la pollution de leau potablepar retour - Rupteur vent atmosphrique permanent DN10 DN 20 - Famille D, type CSicherungseinrichtungen zum Schutz des Trinkwassersgegen Verschmutzung durch Rckflieen -Rohrunterbrecher mit st
10、ndig geffneten Luftein-trittsffnungen, DN 10 bis DN 20 - Familie D, Typ CThis European Standard was approved by CEN on 24 December 2004.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 s
11、tandard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other
12、language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
13、Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagemen
14、t Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14453:2005: EEN 14453:2005 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6
15、 4 Nominal sizes.6 5 Designation 6 6 Marking and technical documents.7 7 Symbolization.8 8 General design characteristics 8 9 Physico-chemical characteristics9 10 Characteristics and tests 9 11 Acoustic characteristics .14 Annex A (normative) Sampling and test sequence15 Bibliography 16 EN 14453:200
16、5 (E) 3 Foreword This document (EN 14453:2005) 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
17、latest by November 2005, and conflicting national standards shall be withdrawn at the latest by November 2005. This document has been developed with reference to EN1717 “Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by b
18、ackflow“. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Den-mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
19、 Latvia, Lithuania, Luxem-bourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14453:2005 (E) 4 Introduction In respect of potential adverse effects on the quality of water intended for human consumption, caused by the product cov
20、ered by this document: a) this document provides no information as to whether the product may be used without restriction in any of the Member States of the EU or EFTA; b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning t
21、he use and/or the characteristics of this product remain in force. EN 14453:2005 (E) 5 1 Scope This document specifies: a) field of application; b) requirements for pipe interrupters with permanent atmospheric vent; c) dimensional, the physico-chemical properties and the properties of general hydrau
22、lic, mechanical and acoustic design of pipe interrupters with permanent atmospheric vent, DN 10 to DN 20; d) test method and requirements for verifying these properties; e) marking and presentation; f) acoustics. This document specifies the characteristics of pipe interrupters with permanent atmosph
23、eric vent, DN 10 to DN 20 that are suitable for use in drinking water systems at pressures up to 1 MPa (10 bar) and temperatures up to 65 C and for 1 h 90 C. Backflow protection devices integrated in flushing valves are similar to DC and are not covered under this document. The requirements are stat
24、ed in EN 12541. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer-ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 806-1:
25、2000, Specifications for installations inside buildings conveying water for human consumption Part 1: General EN 1717:2000, Protection against pollution of potable water in drinking water installations and general re-quirements of devices to prevent pollution by backflow EN ISO 228-1, Pipe threads w
26、here pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) EN ISO 3822-1, Acoustics Laboratory tests on noise emission from appliances and equipment used in water supply installations Part 1: Method of measurement (ISO 3822-1:1999) EN ISO 3
27、822-3, Acoustics Laboratory tests on noise emission from appliances and equipment used in water supply installations Part 3: Mounting and operating conditions for in-line valves and appliances (ISO 3822-3:1997) EN ISO 3822-4, Acoustics Laboratory tests on noise emission from appliances and equipment
28、 used in wa-ter supply installations Part 4: Mounting and operating conditions for special appliances (ISO 3822-4:1997) EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices Part 1: Orifice plates, nozzles and Venturi tubes inserted in circular cross-section conduits run
29、ning full (ISO 5167-1:1991) EN ISO 6509, Corrosion of metals and alloys Determination of dezincification resistance of brass (ISO 6509:1981) EN 14453:2005 (E) 6 ISO 7-1, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation ISO 9227, Corrosio
30、n tests in artificial atmospheres Salt spray tests 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1717:2000, EN 806-1:2000 and the following apply. pipe interrupter with permanent atmospheric vent pipe interrupter fitted with air inlet port(s) which
31、is (are) totally unrestricted and permanent. Water flows verti-cally downwards. The device prevents back flow by venting to atmosphere all the downstream and upstream elements. For the purpose of this document “pipe interrupter with permanent atmospheric vent DC“ is hereafter referred to as “device(
32、s)“ 4 Nominal size The nominal size of device (DN designated) shall correspond to the denomination of the thread according to Table 1. For specifications of threads refer to 8.2. Table 1 Nominal size vs thread size DN 10 15 20 Thread size 5 Designation The devices are designated by: a) name; b) refe
33、rence to this document (EN 14453); c) family, type; d) DN; e) body material; f) acoustic group. Example for a designation: Pipe interrupter, EN 14453, family D, type C, DN 20, gun metal, I EN 14453:2005 (E) 7 6 Marking and technical documents 6.1 General In countries where the use of products made o
34、f dezincification resistant materials is not required, the dezincification resistant products according to EN ISO 6509, as well as the products which do not contain zinc, may be marked “DR“. In countries where the use of dezincification resistant materials is required, the dezincification resistant
35、prod-ucts, as well as the products which do not contain zinc, shall be marked “DR“. 6.2 Marking The devices shall be marked permanently and visibly on the casing or on a fixed data plate. This information shall be on the upper side or on each lateral side of the device. The indications shall be in-d
36、elible and obtained by moulding, engraving or similar procedures. The marking shall indicate: a) name, manufacturers brand or logo; b) arrow indicating normal direction of flow; c) nominal size (DN); d) acoustic group; e) letters indicating family and type of device; Marking a), b), c), and e) are o
37、bligatory. In case there is no marking for d), the device shall be considered as not classified acoustically. 6.3 Technical documents Each package and/or each batch and/or each catalogue of the supplier/manufacturer shall contain technical product information which shall be written in a commonly spo
38、ken language of the country in which the product is sold. It shall provide the following information: a) designation and purpose of the product; b) installation instructions; c) minimum installation height; d) (brand) name and address of supplier/manufacturer; e) instructions for maintenance, if any
39、; f) spare part list, if any. EN 14453:2005 (E) 8 7 Symbolization The graphic representation of the device is as follows (see Figure 1): Figure 1 Graphic symbol 8 General design characteristics 8.1 Design principle A typical design principle of the device is given in Figure 2. Key 1 Direction of wat
40、er flow 2 Air Figure 2 Design principle 8.2 Connections Connections shall comply with EN ISO 228-1 or ISO 7-1. 8.3 Air inlets Air inlets shall be shrouded and designed to ensure that they cannot easily be blocked by deposits. Dimensions of external air inlets shall be as shown in Figure 2 and shall
41、be verified as given in 10.3.2. EN 14453:2005 (E) 9 9 Physico-chemical characteristics 9.1 Materials The materials and the coatings used, liable to come normally or accidentally in contact with potable water, shall satisfy the EU regulations concerning water quality. The materials and the coatings s
42、hall be: a) corrosion resistant in accordance with ISO 9227; b) prone to the least scaling possible; c) in conformity with the associated standards and regulations; d) compatible among themselves and with: water distributed; fluids or matter liable to come into contact with them; products normally u
43、sed for disinfection operations of the network: potassium permanganate and so-dium hypochlorite. 9.2 Nature of materials The choice of materials is left to the discretion of the manufacturer a) Copper-zinc alloys containing more than 10 % zinc are subject to denzincification when submitted to wa-ter
44、 capable of dezincification. In the countries where the use of products made of dezincification resistant ma-terials is required, the products shall guarantee a dezincification depth less than 200 um in any direction, they shall be tested in accordance with EN ISO 6509 and shall be marked in complia
45、nce with the indication in Clause 6; b) Neither the materials nor coatings used shall, by normal or accidental contact with drinking water, cause any risk of affecting or modifying the water up to a temperature of 90 C. The suitability of the water for human consumption is defined by national regula
46、tions; c) The manufacturer shall state in his technical and sales literature the nature of the materials and the coat-ings selected; d) The materials, and in particular copper alloys, for which recommendations or standards exist shall comply with the relevant recommendations or standards. 10 Charact
47、eristics and tests 10.1 General Examples shown in the figures are for guidance only. Laboratory equipment shall be designed to ensure that the devices can be tested in accordance with the requirements. The accuracy of measurements and accuracy of measuring instruments shall not exceed the following:
48、 a) Accuracy of measurements In the absence of any particular specifications: EN 14453:2005 (E) 10 flow rate and pressure: 2 % of the value indicated; temperature: cold water 5 C of the value indicated; hot water 2 C of the value indicated; time: %100+of the value indicated; b) Accuracy of measuring
49、 instruments Measuring instruments shall have a precision of 2 % of the measured value. Temperature measure-ments shall be accurate to 1 K. 10.2 Test sequence The device for type testing shall be tested in accordance with the following sequence. Minimum three (3) samples shall be submitted. The test sequence is specified in Annex A. Stage 1: Visual verification. See 10.3. Stage 2: Bending moment. See 10.4. Stage 3: Vacuum test. See 10.5. Stage 4: Flow rate/pressure loss leak tightness. See 10.6. For c
