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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12050-4:2001 The Eu
2、ropean Standard EN 12050-4:2000 has the status of a British Standard ICS 13.060.30; 91.140.80 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Wastewater lifting plants for buildings and sites Principles of construction and testing Part 4: Non-return valves for faecal-free wast
3、ewater and wastewater containing faecal matter This British Standard, having been prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 February 2001 BSI 02-2001 ISBN 0 580 369
4、09 9 BS EN 12050-4:2001 Amendments issued since publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN 12050-4:2000. The UK participation in its preparation was entrusted to Technical Committee B/505, Wastewater engineering, which has
5、the responsibility to: aid enquirers to understand the text; present to the responsible European committee any 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 o
6、f organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International S
7、tandards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Stand
8、ard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 15 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. EUROPEAN S
9、TANDARD NORME EUROPENNE EUROPISCHE NORM EN 12050-4 December 2000 ICS 91.140.80 English version Wastewater lifting plants for building and sites Principles of construction and testing Part 4: Non-return valves for faecal-free wastewater and wastewater containing faecal matter Stations de relevage dff
10、luents pour les btiments et terrains Principes de construction et dessai Partie 4: Dispositif anti-retour pour eaux rsiduaires contenant des matires fcales et exemptes de matires fcales Abwasserhebeanlagen fr die Gebude- und Grundstcksentwsserung Bau- und Prfgrundstze Teil 4: Rckflussverhinderer fr
11、fkalienfreies und fkalienhaltiges Abwasser This European Standard was approved by CEN on 1 December 2000. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteratio
12、n. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
13、under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Lu
14、xembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any form and by an
15、y means reserved worldwide for CEN national Members. Ref. No. EN 12050-4:2000 E Page 2 EN 12050-4:2000 BSI 02-2001 Contents Page Foreword3 1Scope 3 2Normative references3 3Terms and definitions.4 4Requirements.4 5Principles of construction4 5.1Connections.4 5.2Solids passage 4 5.3Design requirements
16、 .4 5.4Cleaning opening.4 6Materials .5 7Testing documentation and samples to be tested5 8Testing5 8.1General requirements5 8.2Functional testing.5 9Conformity evaluation.6 9.1General 6 9.2Initial testing of the products (type testing)6 9.3Factory production control (FPC) carried out by the manufact
17、urer (internal conformity evaluation).6 9.4Non-conforming products7 10Marking.7 Annex A (normative) Noise level .8 Annex B (informative) Recommended materials 9 Annex C (informative) Conformity evaluation by an independent third party (third party evaluation)10 Annex Z (informative) Links with the E
18、U Construction Products Directive (89/106)12 Bibliography15 Page 3 EN 12050-4:2000 BSI 02-2001 Foreword This European Standard has been prepared by Technical Committee CEN/TC 165, Wastewater engineering, the Secretariat of which is held by national standard body. This part of this European Standard
19、for wastewater lifting plants for buildings and sites was prepared by Task Group 4, Wastewater lifting plants, of Working Group WG 21, Drainage systems within buildings, of CEN Technical Committee TC 165, Wastewater engineering. This is the fourth part of a total of four parts of the standard series
20、 EN 12050 with the following titles: Part 1: Lifting plants for wastewater containing faecal matter; Part 2: Lifting plants for faecal-free wastewater; Part 3: Lifting plants for wastewater containing faecal matter for limited applications; Part 4: Non-return valves for faecal-free wastewater and wa
21、stewater containing faecal matter. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2001, and conflicting national standards shall be withdrawn at the latest by September 2002. This European S
22、tandard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative annex Z, which is an integral part of this standard. According to
23、the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain,
24、 Sweden, Switzerland and the United Kingdom. Annex A is normative. The annexes B, C and Z are informative. 1Scope This part of this European Standard applies to non-return valves used in conjunction with faecal and faecal-free wastewater lifting plants. This part of the standard contains general req
25、uirements, basic construction and testing principles together with information on materials and conformity evaluation. 2Normative references This European Standard incorporates by dated or undated reference provisions from other publications. These normative references are cited at the appropriate p
26、laces in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication re
27、ferred to applies (including amendments). EN 1085:1997, Wastewater treatment Vocabulary. EN 12050-1:2001, Wastewater lifting plants for buildings and sites Principles of construction and testing Part 1: Lifting plants for wastewater containing faecal matter. EN 12050-2:2000, Wastewater lifting plant
28、s for buildings and sites Principles of construction and testing Part 2: Lifting plants for faecal-free wastewater. EN 12050-3:2000, Wastewater lifting plants for buildings and sites Principles of construction and testing Part 3: Lifting plants for wastewater containing faecal matter for limited app
29、lications. EN 12639:2000, Liquid pumps and pump units Noise test code Grade 2 and grade 3 of accuracy. Page 4 EN 12050-4:2000 BSI 02-2001 3Terms and definitions For the purposes of this standard, the terms and definitions given in EN 1085:1997 and the following apply. 3.1 non-return valve part of a
30、wastewater lifting plant that prevents backflow of wastewater from the discharge pipework 3.2 backwash device part of the non-return valve which allows draining of the discharge pipework and venting of the pumping device 3.3 initial testing (type testing) of non-return valves testing to demonstrate
31、that a non-return valve conforms to this standard 4Requirements Non-return valves shall automatically prevent wastewater flowing back from the discharge pipework when the pumping operation stops. Non-return valves shall open automatically during pumping. Connections to the discharge pipework shall r
32、esist longitudinal forces. They shall be capable of withstanding the maximum pump pressure of the wastewater lifting plant without leakage. 5Principles of construction 5.1Connections Non-return valves, which are not an integral part of a wastewater lifting plant, shall have connections complying wit
33、h relevant pipework standards. 5.2Solids passage The free solids passage of a non-return valve shall be at least 80 % of the internal diameter of the discharge pipework minus 4 mm, i.e.: Ds = 0,8 ? Di 4 mm where: Dsis the solids passage, in millimetres Diis the internal diameter of the discharge pip
34、ework, in millimetres 5.3Design requirements Non-return valves shall ensure that solids present in wastewater, particularly fibrous materials, cannot be retained. 5.4Cleaning opening For non-return valves of DN ? 80, intended for use with faecal lifting plants, the inside of the non-return valve sha
35、ll be accessible via an opening with a gas and watertight cover. For non-return valves of DN 1003 Page 6 EN 12050-4:2000 BSI 02-2001 8.2.5Pressure testing Non-return valves shall withstand a test pressure of at least 6 bar when open and when closed. For non-return valves that are integral with the p
36、lant, the test pressure shall be 1,5 times the maximum pump pressure of the plant. There shall be no visible leakage from the valve over the test duration of 10 min. 8.2.6Testing of backwash devices If a backwash device is fitted, a check shall be made to ensure that it can be opened against a count
37、er pressure of 1 bar. 9Conformity evaluation 9.1General To demonstrate conformity with this standard the products shall be subjected to the following evaluation procedures: initial testing of the products (type testing) according to clause 8 and annex A of this standard; factory production control t
38、o be carried out by the manufacturer (internal conformity evaluation) according to 9.3 of this standard. If third party control is carried out other than required in annex Z, due to national requirements for example, this should be carried out in accordance with annex C (informative). 9.2Initial tes
39、ting of the products (type testing) The type tests in accordance with clause 8 and annex A of this standard shall be carried out on first application of this standard in order to demonstrate compliance with the requirements of this standard. Where these characteristics have been determined by the co
40、mponents supplier, it need not be retested by the lifting plant manufacturer. Tests previously performed in accordance with the provisions of the standard (same product, same characteristic(s), test method, sampling procedure, system of attestation of conformity, etc) may be taken into account. When
41、ever a change occurs in the design, the raw material, components, supplier of the components or the production process, which would change significantly one or more of the stated characteristics, the type tests shall be repeated for the appropriate characteristic(s). 9.3Factory production control (F
42、PC) carried out by the manufacturer (internal conformity evaluation) The FPC shall be carried out according to Table 2. The manufacturer shall establish, document and maintain an FPC system to ensure that the products, placed on the market, conform with the stated performance characteristics. The FP
43、C system shall consist of procedures, regular inspections and tests and/or assessments and the use of results to control raw and other incoming materials or components, the production process and the product, and shall be sufficiently detailed to ensure that the conformity of the product is apparent
44、. An FPC system conforming with the requirements of EN ISO 9001 and/or EN ISO 9002 and made specific to the requirements of this standard, is considered to satisfy the above requirements. The manufacturer shall have the following available: an organisation chart with information on the person respon
45、sible for the conformity evaluation system; trained personnel; the required production equipment; the required test equipment. Page 7 EN 12050-4:2000 BSI 02-2001 The manufacturer shall provide written procedures for the following: control of the test reports; control of defective products, storage,
46、handling and marking; the handling of customer complaints; the calibration and checking of measuring and test equipment. Table 2 Internal production control carried out by the manufacturer No.PropertiesFrequencyRequirement as per clause 1Principles of construction Marking Visual examination to deter
47、mine that the device is complete, able to function and free from defects per product5 and 10 2Dimensionsone part per production day and type *) 5.2 3Materials Use of the materials in accordance with the initial type test one part per production day and type *) 6 and 7 4Hydraulic values one part per
48、production day and type *) 8 *)The frequency and extent of sampling depends on the production program, the scale of production and the manufacturing process in each factory. At least one part per production day and type shall, however, be checked. Where these characteristics have been determined by
49、the components supplier they need not be retested by the lifting plant supplier. 9.4Non-conforming products All non-conforming products shall be separately stored and excluded from delivery, and instructions shall be given for further handling, storage and marking. If during the factory production control non-conforming products are detected, the manufacturer shall investigate the cause of the defect and take appropriate corrective actions, e.g. stop the production related to the failu
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