1、Guide for procurement of power station equipment - Part 6-7: Tixrbine auxiliaries - Moisture separator reheaters The European Standard EN 45510 27.100 BS EN 45510-6-7:1998 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 45510-6-7:1998 This Britis Standard, having been pr
2、epared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 June 1998 National foreword This British Standard is the English language version of EN 45510-6-7:1998. The UK participation in its preparation was entrust
3、ed to Technical Committee W-LO, Power engineering steering committee, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible InternationaYEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed
4、; - monitor related international and European developments and promulgate them in the UK. 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 t
5、his document may be found in the BSI Standards Catalogue under the section 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. Us
6、ers of British Standards are responsible for their correct application. Compliance with a British Standard 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 16, an inside back cover
7、and a back cover. Amendments issued since publication Amd.No. Date I Text affected O BSI 1998 ISBN O 580 29217 7 * KO * EUROPEAN mmm EN 4551067 January 1998 ICs 27.040: 27.100 Descriptors: Electric power stations, turbines, separators, overheating, purchase, user supplier relations, invitation of te
8、nders, specifications, technical writing English version Guide for procurement of power station equipment - Part 67 Mine amilbries - Moisture separator reheaters Guide pour lacquisition dquipements destins aux centrales de production dlectticit - Partie 67 Auxihires de turbine - sparateurs-suchaufTe
9、urs Leitfaden fur die BeschalTung von Ausrustungen fur Kraftwerke - Teil 67 nirbinenhilfseinrichtungen - Wasserabscheider/ZwischenberhiWr This European Standard was approved by CENKENELEC on 11 December 1997. CENKENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipu
10、late the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographieal references concerning such national standards may be obtained on application to the Central Secretariat or to any CENKENELEC member. This European Stan
11、dard exists in three official versions (English, French, German). A version in any other language made by tsanslaton under the responsibility of a CENKENELEC member into its own language and notified to the Centsal Secretariat has the same status as the official versions. CENKENELEC members are the
12、national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norwax Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN/CENELEC CEN Central Secretariat rue de Stassart 36, B-1050 Brussels CENELEC
13、Central Secretariat rue de Stassart 35, E1050 Brussels O 1998 CENKENELEC All rights of exploitation in any form and by any meam reserved worldwide for CEN national Members and for CENELEC Members. Ref. No. EN 45510-671998 E STD-BSI BS EN 455LO-b-7-ENGL 1778 lb24bb7 07083b7 T47 Page 2 EN 4561W7:1998
14、Foreword This standard tah the form of a, recommendation and is mefore entitled a “Guide: This Guide for procu-t has been prepared by the CENKENELEC Joint Task Force Power Engineering (JTFPE) of which the secretariut is held by BSI. This European Standard shcl be given the status of a national stand
15、ard, either by publication of an identical text or by endorsement, at the latest by July 1998, and conflicting national standards shau be withdrawn at the latest by July 1998. This Guide for procurernent has been prepared under mandates given to CEN and CENELEC by the Eumpean Commission and the Euro
16、pean Free Trade Association. This Guide for procurement is a part of a series of Guides mandated to cover ULe procurement of power station plant and equipment in conformity with Eumpean Procurement firectives. Guides are: EN 45510 Guide for procurement of power station equipment Part 1: Common - moi
17、sture separator as a vessel containing the moisture separators; - high velocity moisture separators as a part of the cross-under or cross-over line; - reheaters as a vessel containing the reheater bundles; - moisture separators (for replacement installation); - reheater bundles (for replacement inst
18、allation); - moisture separator reheater auxiliary equipment (drains, vents and heating steam systems). - pipework from and to the turbines and for drain and vent systems; - drain pumps. This Guide does not cover The equipment covered by this Gu - predicted peflormance is achieved; - ancillary equip
19、ment is propdy sized; - reliability, availabilitg and safety requirements are achieved; - proper consideration is given to the evaluation process and the quality measures to be applied. mis Guide does not deermine the type of specification (e.g. detailed, pegormance, functional) or the QXPA of suppl
20、y for any given contract which is norrruy decided on the basis of the purchasers project strategy. It does not cover: - any comrnerciai, contractual or legal issues which are normally in separate parts of an enquiry; - any allocation of responsibilities which are determined by the contract. This Gui
21、de does not pesm:be the awangement of the documents in the enquiry. NOTE As a comprehensive European environmental policy is stiU under prepamtion, this Guide does not address the environmental implications of the equipment. 2 Normative references This Guide for procurement incorporates by dated or
22、undated refme, provisms fmm other publications. These nomtive refemes are cited in the appropriate places in the text and the publications are listed hmeajm For dated refwmes, subsequent amendments to or nwkwns of any of We publications apply to this Guide only when incorporated in it by amendment o
23、r revision. For undated references, the latest edition of the publication referred to applies. EN IS0 9001, Quality systems - Model for quality assumnce in design, develosyment, production, instauation and servicing (IS0 9001:1994). EN IS0 9002, Quality systems - Model for quality assurance in produ
24、ction, installation and se?wicng (IS0 9002: 1994). IEC 50 (191), International electmtechnical vocabuhry - Chapter 191: Dependurility and quality of service. 3 Di?!initiOns For the purposes of this Guide, the following definitions apply: 3.1 organizational tem 3.1.1 purchaser recipient of a product
25、ador a service p?vvkd by a supplier 3.1.2 supplier person or organization that provides a product ador a service to the purchaser 3.1.3 specifZcation document stating technical requirements of the purchaser. It muy form part of an enquiry issued by a purchaser 3.1.4 enquiry invitation to tender issu
26、ed by a purchaser. It wiU nomzaily include a specification together with the necessary contractual and commerciul conditions 3.1.6 tender offer made by a tenderer in response to an enquiry 3.1.6 tenderer person or organization submitting a tender for the equipment in response to the enquiry O BSI 19
27、98 STD*BSI BS EN 455LU-b-7-ENGL 1778 Lb2LibbS 0708372 531 * Tn * 3.1.7 site place to which Uze equipment 2s to be delivered or where work 2s to be done by Uze supplier, together with so much of Uze area surrounding as the supplier may, with the consent of Uze purchaser, use for Uze purposes of Uze c
28、ontmct. NOTE Further - the tube surface within the tube sheets; - the surface not affected by the cycle steam. 3.2.10 active surface effective surface area used for the heat transfer calculations and that portion of the total surface which is in contact with flowing cycle steam 3.2.11 drain tanks ta
29、nks which are sepasate or attached to the shell, to collect and drain condensate from the moisture separator or reheater 3.2.12 heating stages reheating can be performed in one or two stages. In general the first stage is heated by extraction steam and the second by live steam 3.2.13 heating steam p
30、asses a heating steam pass is a section of the tube bundle where the heating steam flows without a change of flow direction. The first pass starts at the heating steam inlet. After a change of the heating steam flow direction (in a bend or in the steam chamber) a new pass commences 3.2.14 heating st
31、eam steam which is used in the reheater to reheat the cycle steam. The heating steam can be live steam or extsacton stem 3.2.16 cycle steam wet steam leaving the turbine to be dried and reheated 3.2.16 purging steam excess steam at the end of a pass which has not condensed during the reheating proce
32、ss. Purging steam used internally for heating the next pass is - ge0lagh.l e.g. se2Smic conditions and charactenstics of subsoil (e.g. caverns, gliding stratifkations, load bearing capability of subsoils; - geographic e.g. elevation, influence of local topography and structures; - hydrological e.g.j
33、boding and tides. 4.3 Equipment task The specification should describe in geneml terms the function, tusk or role of the equipment to be purchased, e.g. whether it is part of a nao power genemting plant, a modification to an existing power genemting plant, or rephernent equipment. Where appropriate,
34、 the specification should define the function and 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 modifica,tions to connected equipment which would mure satisfacmy operation
35、. Page 7 EN 45510-6-7:1998 4.4 Equipment to be purchased DE spectfication may define the equipment type or arrangement to be purchased, for example: - the moisture separator reheater type (combined moisture separator reheater, separate moisture separator, separate reheater, reheater bundles, high ve
36、locity moisture separator); - number of shells; - number of heating stages; - number of moisture separating units and/or reheater bundles per shel. The specification my the-se should be to a recognized European or intemational sWuhrd. The specification should defhe the type and capacity of other ser
37、vices for the operation of the equipment such as compressed air, water or auxiliary steam. 4.7 Other intedaces Th speewcation should define the inter$aces with existing ana%ary or new a drain and vent systems; safe, control and shut-off valves, pressure, temperature and level local and remote indica
38、tors, level conb-o1 systems, test instrumentation, tube leak and excess residual moisture monitoring devices (heating steam flow measurement); gaskets, tube plugs, orifices, tools, etc.; handing and maintenance systems, stairs and platforms for maintenance and access; transport, storage, installatio
39、n, temporary protection for transport and site storage, cleaning of the moisture separator reheater after instailation; commissioning andor performance tests; equipment details, operation and maintenance manuals If the purchaser wishes to have a contmct for control and instrumentation separate from
40、the equipment supply contract, the specification may require the supplier to provide infomtion on aU the necessary inwaces (e.g. ali instsum ents provided within the scope of supply). In addition provision may need to be made in the contmct to mure the availability of information necessary to adow a
41、 sat.tsfactory control system to be obtained. For example, this may include a requirement for cooperation between the purchaser and supplier. Alternatively the specification may should be stated. Wwe releuant, the specification should also state the policy in the following operational areas: - rislc
42、s e.g. loss of electrical supplies, loss of water suppLies or cooling systems; - obligations e.g, opemtwnal stag shift patterns; - restrictions e.g. process wate disposal. 7.2 Manning levels The specification should define the power station manning levels where ULey may influence the equipment suppl
43、y. 7.3 Normal operation The specification should define in broad terms the expected normal operation of the power station and of the equipment. The specification should define maximum and minimum normal operating conditions for the moisture separator reheater or any component. The purchaser should d
44、efine the operating hits for normal operation and any requirements for economic operation (e.g. reheater bundles out of service). 7.4 Operating hours The specification should - reheater bundles out of service; - operation with excess working fluid pressure or temperature; - failure of control equipm
45、ent. The specification should interpret these incidents into appropriate terminai point transients. In particular the allowable temperature difference between LP-turbine inlets and the allowable time of operation without reheater should be defined by the purchaser. In some cases these abnormal condi
46、tions may be avoided by modifications to equipment outside the scope of supply This may be covered by a contract option in the tender. 7.7 Further operational requirements The specification should provide information on the required flexibility and controllability of the moisture separator reheater
47、plant during transient operation. For flexibility this may comprise typical time history information and specific control criteria. For controllability the Illnits on operating parameters should be stated 8 Life expectancy 8.1 Design life 8.1.1 Geneml This should be a specific ped which talces into
48、account Uze anticipated operating regime and recomme?zcled maintenance and wiU broad9 equate to the stated operating hours (see 7.0). The Specification should define the design life of components which may be subject to perodic replacement. The supplier should define Limitatwns on equipment life, qa
49、ny, and these should be included in the tender evaluation process. The specification should define the number and me 8.1.2 Number of stad-up a - cycle steam pressure and temperature; - cycle steam moisture content; - heating steam pressure, temperature and moisture content; - TTD or turbine thermodynamic characteristics for optimisation; - maximum permissible shell side pressure drop or turbine thermodynamic characteristics for optimisation; - heat balances; - maximum permissible pressures and temperatures on the cycle steam and heating steam side. Further spe
