1、STD.BSI BS EN 455LO-b-3-ENGL 1778 Lb24bb9 0b77823 804 BRITISH STANDARD Guide for procurement of power station equipment - Part 6-3: Turbine auxiliaries - Condenser plant The European Standard EN 4551-631998 has the status of a British Standard ICs 27.040 27.100 BS EN 155 10-6-3: 1998 NO COPYING WITH
2、OUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGEPT LAW STD=BSI BS EN 455LU-b-3-ENGL 1778 Lb2Libb9 0b7782i.1 740 BS EN 46610-63:1998 AmdNo. This British Standard, having been prepared under the direction of the hgineering Sector Board, was published under the authority of the Standards Board and co
3、mes into efect on 15 May 1998 Date Text affected Ca BSI 19% ISBN O 580 29218 6 National foreword This British standard is the English language version of EN 45510-63:1998. The UK participation in its preparation was entrusted to Technid Committee E/-EO, Power engineering steering committee, which ha
4、s the responsibility to: - aid enquirers to understand the tee - 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
5、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 pubiications referred to in this document may be found in the BSI Standards Catalogue under the section entitied “Inlemati
6、onal Standards Correspondence index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include ali the necessary provisions of a contract Users of British Standards are responsible for their correct application. Compliance with a Briti
7、sh Standard does not of itself confer immunity from legai obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN titie page, pages 2 to 17 and a back cover. Amendments issued since publication STD-BSI BS EN 4551D-b-3-ENGL 1778 Zb2Libb9 Ob77825 b87 EUROPEAN
8、 SrANDARD NORME EUR0PEE”E EUROP- NORM EN 4551W January 1998 ICs 27.040 27.100 Descriptors: Electric power stations, turbines, installation, condensation, purchase, user supplier relations, invitation of tenders, specifications, technical writing English vmion Guide for procurement of power station e
9、quipment - Part Ek Tfbine axdiaries - Condenser plant Guide pour lacquisition dquipements destins aux centrales de production dlectricit - Partie 63 Auxdiaries de turbine - htalhiion de condensation Kondemationsaniage Leitfaden fr die Beschaffung von AusnMungen fur Kraftwerke - Teil 63 chen - This E
10、uropean Standard was approved by CENKENELEC on 11 December 1997. CENKENELEC members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Uptodate ists and bibliographica
11、l references concerning such national standards may be obtained on application to the Centrai Secretariat or to any CENKENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by tsanslation under the responsibility of a
12、 CENKENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENKENELEC members are the national standards bodies and national electrotechnical committees, respectively, of Austria, Belgium, Czech Republic, Denmark, Finland, France, G
13、emy, Greece, Iceland, Ireland, Italy, Luxembourg, Netheriands, Norway, Portugal, Spajn, Sweden, Switzerland and United Kingdom. CEN Central Secretariat rue de Stassast 36, EL1050 Brussels CENELEC Central Secretariat rue de Stassart 35, 3-1050 Brussels O 1998 CENKENELEC All rights of exploitation in
14、any form and by any means reserved worldwide for CEN national Members and for CENELEC Members. Ref. No. 45510-6-3:1998 E STD-BSI BS EN ?455LO-b-3-ENGL 1998 Lb2LibbS Ob9782b 513 Page 2 EN 4561W:1998 Foreword This stanun talces the form of a recommendation and is tmjre entitled a ?guide?. Part 4-2 BoU
15、er auxhm2.s - Ash hnding plant Part 4-8: BoUer auxh+ - Dust hnding phnt Part 4-9: BPean commission and the European Free li.ade Associattion. This guide forprocurement is apart of a seria of statiort plunt and equipment in cmformity with Eumpmn Frocuri7ment Directives. % guides are: guides Wndated t
16、0 GWW thep?XWmh?tt Of EN 45510 Gu - condenser auxiliary equipment. Air blast or airaole type condensers (ACCs) are not covered by this guide. The equipment coverad by this gui - pmdictedpe#ormunce is achieve - any allocat.ion of wspnsb . *it.ieSwhichare determinecl by the contract. mis pide does not
17、 prvxrw the amngement of the documents in the enquiry. NOTE As a comprehensiw Eumpean avironmatal policy is stiu un it consisis of the pipework within and outside of the condenser, vacuum pumps and/or ejectors and air treatment system. The evacuation system is a system to remove the air from the con
18、denser and connected piant at starbup. These two systems can be totally or partially common 3.2.26 (cooling water spray system system of pipework equipped with nozzles through which the cooling water is iqjected into the direct contact condensee) 3.2.27 water box priming system system to remove air
19、hm the water boxes at start-up and in operaion 3.2.28 tube cleaning system system to clean the condenser tubes on the cooling water side 3.2.29 debris filter system system instaiied at the water box inlet nozzle to remove smailer debris hm the cooling water. The removed debris is fed to the cooling
20、water leaving the condenser 3.2.26 3.2.30 condenser plant all piant components within the scope of delivery of the condenser. Along with the auxiliary equipment belonging to the condenser, the condenser plant should represent a fully functional steam sink plant 3.2.31 auxiliary plant and equipment m
21、achines, equipment, accessories, and items required for establishing the functionai capabiity of the condenser plant, except for site facilities 3.2.32 operating conditions physical conitions imposed on the Condenser by the flow conditions of exhaust steam, cooling water, drains and steam and conden
22、sate dumps 3.3 general terma 3.3.1 equipment plant, component, system ador associated service to be provied in resyxwlse to the enqu2ry 3.3.2 corzformity fulfilment of specifa requ2rements by a product, process m service 3.3.3 pe#ormanee obl.igat.ions Mfa by sm tests 3.3.4 operating perio tim betwee
23、n planned outages or maintenance periods during which the equipment is in operation and/or does not restTGt 0perat.iOnal requirements of the wer stam 3.3.6 We expectancy tim period over which the equipment might be tmpected to operate with planned maintenance but without replacement of a signifiant
24、comjxrmmt 3.3.6 - geological e.g. seismic conditions and charactemstics of subsoil (e.g. caverns, gliding stratifications, load bearing capability of subsoils); - geographic e.g. elevation, influence of local topography and structures; - hydrological e.g. jboding and tides. 4.3 Equipment task The sp
25、ecifLcation should describe in genera terms the function, task or role of the equipment to be purcbed, e.g. whether it is part of a nao power generating phnt, a modification to an existing power generating phnt, or replacement equipment. Where appmpriate, the specmeation should define ULe function a
26、nd the Imown limitations, any, in the equipment connected to that which is being supplied so that the equipment may avoid imposing adverse conditions or the supplier may suggest modifications to connected equipment which would ensure satisfactory operation. 4.4 Equipment to be purchased The specific
27、ation my define the equipment type OT arrangement to be purebed, for example: - the condenser type (water cooled surface or direct contact condenser); - number of shells; - number of passes; - singie or muiti-pressure condenser. The specification may also define preferences for equipment types (or g
28、ive information) reganing compatibility with existing equipment, if required. The specification should define the intended methods or local practice for mintenume, inspection and operation. The specification should define requirements with regard to the general appearance of the equipment (e.g. dime
29、nsions, shape or colourj to meet local planning requirements or specific criteria, where such requirements exist. NOTE Attention is drawn to European, national and/or local legislation which may place restrictions in this area 4.6 Control and instrumentation The specification should define the genem
30、l requirements for the control and instrumentation system, the kvel of operator interuention allowed or required, integration with other control systems, localized control loops, commonal.ity and redu -auxiliary -tube cleaning system, debris equipment fiiter system, air extraction system, condensate
31、 ex - inshumentation - safe, control and shuboff valves, pressure, temperature, level and oxygen concentration local and remote indicatas; levei control systems, instrumentation for tests, conductivily measurement; plugs, etc.; systems, stairs, platforms needed for control, maintenance and aCceSS; -
32、site activities -transport, storage, hstabtion, tempomy protection for transport and site storage, cleaning of the condenser after hstahtion; -tests - commissioning andor performance tests; - documentation - equipment details, operating and maintenance manuah. -spare parts -accessories -handling and
33、 maintenance - anodes, gaskets, tubes, tools, If the purchaser wishes to have a contract for conlrol and ZnsCrmmentution sepajbm the equipment supply contract, the specifecation may requ.ire the supplier to pmvide iqfhnation on a the nscessary interfaces (e.g. inshments pmvided within the scope of s
34、upply). In addition provision may need to be made in the contmt to ensure the avaihbity of infomzation necessaty to auoW a satQfmtory contml system to be obaine. For example, this may indude a requirenwnt for co-operation between the purchaser and supplier. Altematidy the specifecation may d - oblig
35、ations e.g. opmtional staff shvt patterns; - restrictions e,g. process waste disposal. 7.2 Manning levels The specification should - condenser bundles isolated on water side due to defects or maintenance; - incorrect cooling water quality; - loss of vacuum pumps or ejectors; - excess air inleakage;
36、- flooding of the condenser; - pressure shocks in the cooling water system; - operation with excessive working fluid pressure or temperaime or mass flow rate; - failure of control equipment; - operation of turbine exhaust hood sprays. 7.7 Further operational requirements The specification should inc
37、lude information on the required flexibility and controllability of the condenser plant during transient operation. For flexibility this may comprise typical time history information and specific control criteria For controllability the limits on operating parameters should be stated. O BSI 1998 8We
38、 expec-g 8.1 Design Ive 8.1.1 General This should be a specic period which tdces into account the anticipated opemting regime and recommended maintenance and ui broadly equate to the stated opemting hm (see r.4). The speciftcation should dcifine the design We of mm which muy be sul - cooling water m
39、ass flow rate (for optimization, cooling water pump and system characte*= should be provided); - cooling water quality (salini - cooling water inlet temperature (for opthization, the inlet temperature over the year should be provided); - minimum cooling water temperature; - design back pressure (or
40、to be optimized by the supplier according to turbine and cooling water pump cAKmcteMcs); - maximum allowable cooling water side pressure drop; - maximum dowable condensate oxygen content at dened operating conditions; - maximum ailowable condensate subcooling at defined operating conditions; - maxim
41、um air inieakage; - maximum dowable pressure and temperature both on the steam and cooling water side (spray water side). - fouling resistance; Where appropriate, other special or extreme conditions may be defined such as the possibility of isolating condenser bundles, extreme cooling water mass flo
42、w rate, excessive oxygen concentration in make-up war, etc. b BSI 1998 * * tn 9.2 Performance The specification may define the operating points and other - maximum oxygen concentration in the condensate at design loads and at agreed part loads, - condensate subcooling at design load and agreed part
43、loads; - water side pressure drop at design cooling water flow conditions; - the time to evacuate the plant from atmospheric to a nominated pressure. A special requirement may be that during this period the cleaning systems, if any, are operated to an extent to be agreed. NOTE Performance tests are
44、sometimes conducted off site and may be carried out at conditions different from the operating point. The results may require scaiiig according to agreed niles. 9.3 Equipment margins The spectfication should identgy required equipment margins. The parameters to be considered may be: - tube side velo
45、city; - cooling water pressure and temperature; - air inleakage; - condenser surface area The purchaser should ensure that the input parameters specified wili be appropriate for the whole operating lifetime of the equipment, for example that allowance has been made for cooling water pressure shocks
46、and air inleakage. 9.4 Availability The specification may specvy availability requirements. In order to demonstrate conformity wiuL these requirements, the specification may request the supplier to use data on availabilitg, reliability, and maintainabilitg to carry out an antllys.is to show that the
47、 target availability wiU be met. 9.6 Levels of component redundancy The specification may define requirements for component reduruluv. We requirements may provide either additional operaticmal security or cover extremes of operating conditions, for example additional vacuum pumps or ejectors for exc
48、ess air inleakage. Page 11 EN 45610-63:1998 The supplier should ody use these additional plant components in meeting performance requirements in the conditions defined in the specification. If the specification does not specifu heis of component redundatq, thepurchaser my ask the supplier to demonst
49、rate thut the hl of redundancy included is adequate to meet the availability requirements. 9.6 Further performance requirements Not applicable to this guide. 10 Design and fabrication 10.1 Specific equipment features 10.1.1 Condenser design and construction The specification may propose methods, practices and procedures for the design (e.g. stsuctural calcuiation codes, criteria for combination of loads, etc.). For the supplier these methods and procedures should be considered as minimum requirements. The specification may stipuiak a mini
