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1、BRITISH STANDARD BS EN 12255-1:2002 Wastewater treatment plants Part 1: General construction principles The European Standard EN 12255-1:2002 has the status of a British Standard ICS 13.030.40; 13.060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun s
2、heffieldun, na, Sat Oct 28 05:42:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12255-1:2002 This British Standard, having been prepared under the direction of the Building and Civil Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and
3、Strategy Committee on 5 February 2002 BSI 5 February 2002 ISBN 0 580 39005 5 National foreword This British Standard is the official English language version of EN 12255-1:2002. The UK participation in its preparation was entrusted to Technical Committee B/505, Wastewater engineering, which has the
4、responsibility to: A list of 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 secti
5、on entitled “International Standards 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.
6、Compliance with a British Standard does not of itself confer immunity from legal obligations. 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 internat
7、ional and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was las
8、t issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:42:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12255-1 January 2002 ICS 13.060.30 English version Wastewater treatment
9、plants - Part 1: General construction principles Stations dpuration - Partie 1: Principes gnraux de construction Klranlagen - Teil 1: Allgemeine Baugrundstze This European Standard was approved by CEN on 9 November 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
10、 stipulate the conditions for giving this European Standard the status of a national standard without any alteration. 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 Standar
11、d 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 Management Centre has the same status as the official versions. CEN members are the national standards
12、 bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE
13、FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12255-1:2002 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:42:52 GMT+00:00 2006, Uncontrolled Copy,
14、 (c) BSI EN 12255-1:2002 (E) 2 Contents page Foreword3 1Scope 5 2Normative references 5 3Terms and definitions6 4Requirements.7 4.1General requirements7 4.2Design requirements .8 4.3Structural requirements8 4.3.1General8 4.3.2Dimensional tolerances.9 4.3.3Concrete tracks9 4.3.4Fixings and connection
15、s between equipment and structures9 4.3.5Access.9 4.3.6Building ventilation10 4.3.7Water supply and drainage.10 4.3.8Lifting equipment.10 4.3.9Storage for hazardous chemicals and fuels .10 4.4Requirements for equipment10 4.4.1Principles for mechanical design.10 4.4.2General design requirements.11 4.
16、4.3Environmental impact .15 4.4.4Safety 15 4.4.5Documentation.15 4.4.6Spare parts, special tools .15 5Test methods15 5.1Function and performance15 5.2Tightness testing of concrete structures16 5.3Tightness testing of earthen basins 16 5.4Tightness testing of other structures and equipment .16 Annex
17、A (informative) Explanatory notes17 Annex B (normative) Structural tolerances.19 B.1Circular tank.19 B.1.1Circular tank with scraper.19 B.1.2Circular tank with a scraper bridge travelling on the side wall (track).19 B.2Rectangular tank19 Bibliography20 Licensed Copy: sheffieldun sheffieldun, na, Sat
18、 Oct 28 05:42:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12255-1:2002 (E) 3 Foreword This European Standard has been prepared by Technical Committee CEN/TC 165 “Wastewater engineering“, the secretariat of which is held by DIN. This European Standard shall be given the status of a national stan
19、dard, either by publication of an identical text or by endorsement, at the latest by July 2002, and conflicting national standards shall be withdrawn at the latest by December 2002. It is the first part prepared by the Working Groups CEN/TC 165/WG 42 and 43 relating to the general requirements and p
20、rocesses for treatment plants for a total number of inhabitants and population equivalents (PT) over 50. The parts of the series are as follows: ? Part 1: General construction principles ? Part 3: Preliminary treatment ? Part 4: Primary settlement ? Part 5: Lagooning processes ? Part 6: Activated sl
21、udge processes ? Part 7: Biological fixed-film reactors ? Part 8: Sludge treatment and storage ? Part 9: Odour control and ventilation ? Part 10: Safety principles ? Part 11: General data required ? Part 12: Control and automation ? Part 13: Chemical treatment - Treatment of wastewater by precipitat
22、ion/flocculation ? Part 14: Disinfection ? Part 15: Measurement of the oxygen transfer in clean water in aeration tanks of activated sludge plants ? Part 16: Physical (mechanical) filtration 1) NOTEFor requirements on pumping installations at wastewater treatment plants, provided initially as part 2
23、 “Pumping installations for wastewater treatment plants“, see EN 752-6 “Drain and sewer systems outside buildings Part 6: Pumping installations“. The parts EN 12255-1, EN 12255-3 to EN 12255-8 and EN 12255-10 and EN 12255-11 were implemented together as a European package (Resolution 232/2001 taken
24、by CEN/TC 165). 1) in preparation Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:42:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12255-1:2002 (E) 4 This European standard is limited to general construction principles. Separate standards for special construction principles for elements
25、 of wastewater treatment plants are covered in other parts. Safety principles and general data required are covered in EN 12255-10 and EN 12255-11. Annex A is informative, annex B is normative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following c
26、ountries are bound to implement this document: Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sa
27、t Oct 28 05:42:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12255-1:2002 (E) 5 1 Scope This European Standard specifies general requirements for structures and equipment as they relate to wastewater treatment plants for a total population of more than 50 PT. The primary application is designed f
28、or wastewater treatment plants for the treatment of domestic and municipal wastewater. Requirements for structures which are not specific for wastewater treatment plants are not within the scope of this European Standard. Other ENs can apply. Equipment which is not solely used in wastewater treatmen
29、t plants is subject to the applicable product standards. However, specific requirements for such equipment when used in wastewater treatment plants are included in this part. General principles of building construction, mechanical and electrical engineering are not subject of this standard. This Eur
30、opean Standard does not cover the design of treatment processes. Differences in wastewater treatment throughout Europe have led to a variety of systems being developed. This standard gives fundamental information about the systems; this standard has not attempted to specify all available systems. De
31、tailed information additional to that contained in this standard may be obtained by referring to the Bibliography. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate pla
32、ces 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 ref
33、erred to applies (including amendments). EN 752-6, Drain and sewer systems outside buildings Part 6: Pumping installations. EN 809, Pumps and pump units for liquids Common safety requirements. EN 1085, Wastewater treatment Vocabulary. EN 12255-9, Wastewater treatment plants Part 9: Odour control and
34、 ventilation. EN 12255-10, Wastewater treatment plants Part 10: Safety principles. prEN 12255-12, Wastewater treatment plants Part 12: Control and automation. EN 60034-1, Rotating electrical machines Part 1: Rating and performance (IEC 60034-1:1996, modified). EN 60529, Degrees of protection provide
35、d by enclosures (IP code) (IEC 60529: 1989). ISO 3506-1, Mechanical properties of corrosion-resistant stainless-steel fasteners Part 1: Bolts, screws and studs. ISO 3506-2, Mechanical properties of corrosion-resistant stainless-steel fasteners Part 2: Nuts. ISO 3506-3, Mechanical properties of corro
36、sion-resistant stainless-steel fasteners Part 3: Set screws and similar fasteners not under tensile stress. ISO 4200, Plain end steel tubes, welded and seamless General tables of dimensions and masses per unit length. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:42:52 GMT+00:00 2006, Un
37、controlled Copy, (c) BSI EN 12255-1:2002 (E) 6 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 1085 and the following apply. 3.1 structure any construction and its components built for the accommodation of equipment 3.2 equipment any componen
38、t which is installed in, mounted on, attached to, or operated on structures, in the performance of their intended function 3.3 unit any structure including any related equipment which is used as a process stage and which can be isolated from other parallel, upstream or downstream structures NOTEExam
39、ples for a unit are a grit chamber, a clarifier, an aeration tank, a thickener, a digester. 3.4 assembly mechanical equipment that can be removed and replaced as a whole NOTEExamples for an assembly are a pump, a compressor, a gas engine, an aerator. 3.5 wastewater treatment plant system for the pur
40、ification of wastewater including structures and equipment 3.6 client municipality, city or other organisation which intents to built a wastewater treatment plant or parts thereof, or its representative 3.7 Bidder company or other organisation which offers to built a plant, or to built or supply par
41、ts thereof 3.8 contractor company or organisation which received a contract to built a plant, or to built or supply parts thereof 3.9 tracks those parts of a structure on which wheels run 3.10 design loading YN effective average loading in continuous operation under full load NOTEIt is greater than
42、or equal to the value of the operating loading which, for example, fluctuates as a function of the given load. 3.11 continuous load bearing capacity YC load bearing capacity in continuous operation under full load 3.12 maximum loading Ymax peak loading which is taken as the switch-off value to which
43、, for example, overload circuit breakers are adjusted Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:42:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12255-1:2002 (E) 7 3.13 maximum load bearing capacity YB highest possible load bearing capacity limited to short-term load peaks, such a
44、s occur on switching on and off NOTEIn addition, alarm loadings YS, lying between the design loading YN and the switch-off loading Ymax, can be agreed as required, YN and Ymax being stated by the equipment supplier. 3.14 utilisation factor KA parameter for the effects on drive units etc., intrinsic
45、to their operation NOTEUsually KA includes either directly or indirectly information on the loading, running time and temperature and is an overall value of the relationship between load bearing capacity and loading. 3.15 design service life 2) operating time until break-down of a machinery element
46、under design loading, which is reached by a certain percentage of the elements tested NOTE ? as an example, the percentage for rolling bearings is 90 %; ? the design service life is different from both the warranty time and an average service life of use, as used for cost efficiency calculations. 3.
47、16 mode of operation characteristic value related to the effects on motors and other electrical components intrinsic to their operation (e.g. frequency of starts, temperatures) 3.17 degree of protection characteristic value related to the effects on motors and other electrical components intrinsic t
48、o their environmental conditions (e.g. effects of water or dust) 4 Requirements 4.1 General requirements Wastewater treatment plants shall meet the following requirements: a) national regulations shall be observed; b) the discharge limits shall be met; c) be capable of satisfactory treatment of the
49、full range of flows and loads; d) personal safety; e) nuisance, odour, noise and toxicity, aerosols and foam shall be considered and shall meet the relevant requirements according to EN 12255-9 and EN 12255-10; f) danger to operating personnel shall be minimized; 2) Explanatory note see annex A Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:42:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12255-1:2002 (E) 8 g) the required service life and long term structural integrity shall be achieved, including water and gas; h)