DIN EN 12953-6-2011 Shell boilers - Part 6 Requirements for equipment for the boiler German version EN 12953-6 2011《壳式锅炉- 第6部分 锅炉设备的要求 德文版本EN 12953-6-2011》.pdf

1、May 2011 Translation by DIN-Sprachendienst.English price group 20No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 27

2、.060.30!$p_“1776060www.din.deDDIN EN 12953-6Shell boilers Part 6: Requirements for equipment for the boilerEnglish translation of DIN EN 12953-6:2011-05Growasserraumkessel Teil 6: Anforderungen an die Ausrstung fr den KesselEnglische bersetzung von DIN EN 12953-6:2011-05Chaudires tubes de fume Parti

3、e 6: Exigences pour lquipement de la chaudireTraduction anglaise de DIN EN 12953-6:2011-05SupersedesDIN EN 12953-6:2002-08www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.5404.11 DIN EN 12953-6:2011-05 A comma is used as the decimal

4、 marker. National foreword This standard has been prepared by Technical Committee CEN/TC 269 “Shell and water-tube boilers” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Rohrleitungen und Dampfkesselanlagen (Piping and Boiler Plant Stand

5、ards Committee), Working Committee NA 082-00-18 AA Dampfkesselanlagen. For more detailed information about the Normenausschuss Rohrleitungen und Dampfkesselanlagen (NARD), please visit www.nard.din.de. Amendments This standard differs from DIN EN 12953-6:2002-08 as follows: a) normative references h

6、ave been updated; b) new terms and definitions have been included; c) the clauses and subclauses have been restructured; d) Annex C “Aspects of boiler operation” has been included; e) Annex E “Alarms and monitoring from the boiler plant” has been included; f) the standard has been editorially revise

7、d. Previous editions a) DIN 4852: 1944-04, 1962-11, 1967-01 DIN EN 12953-6: 2002-08 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12953-6 February 2011 ICS 27.060.30 Supersedes EN 12953-6:2002English Version Shell boilers Part 6: Requirements for equipment for the boiler Chaudires tube de f

8、ume Partie 6: Exigences pour lquipement de la chaudire Growasserraumkessel Teil 6: Anforderungen an die Ausrstung fr den Kessel This European Standard was approved by CEN on 1 January 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for g

9、iving 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three o

10、fficial 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies

11、 of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom

12、. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12953-6:2011: EEN 1295

13、3-6:2011 (E) 2 Contents Page Foreword 31 Scope 52 Normative references 53 Terms and definitions . 54 General requirements for steam boilers and hot water boilers 84.1 Safeguards (safety valves) against excessive pressure . 84.2 Materials for valves, fittings, flanges and bolting 84.3 Protective syst

14、ems 84.4 Heat supply . 84.5 Flue-gas heated economizers 104.6 Drain and blowdown devices . 104.7 Water quality 104.8 Water quality protection 105 Special requirements for steam boilers 125.1 Water level indication 125.2 Steam pressure and temperature indication 145.3 Valves for connections . 155.4 F

15、eed water supply 155.5 Feed water control . 155.6 Limiting devices . 165.7 Electrically heated steam boilers . 166 Special requirements for hot water boilers . 166.1 Hot water generating systems (for example see Annex A) 166.2 Expansion and feed lines for open vented systems 176.3 Water supply 186.4

16、 Water level indication 186.5 Limiting devices . 196.6 Vent valves . 206.7 Pressure and temperature indication 206.8 Pressure controller 206.9 Discharge from safety valves . 216.10 Electrically heated hot water boilers . 216.11 Parallel mode of operation of hot water boilers . 217 Operational aspect

17、s including maintenance and testing 218 Alarms and monitoring from the boiler plant . 22Annex A (informative) Examples of steam and hot water boiler systems. 23Annex B (normative) Dimensioning of expansion space 37Annex C (informative) Aspects of boiler operation . 40Annex D (informative) Drain and

18、blowdown devices . 45Annex E (informative) Alarms and monitoring from the boiler plant . 47Annex F (informative) Significant technical changes between this European Standard and the previous edition . 50Annex ZA (informative) Relationship between this European Standard and the Essential Requirements

19、 of EU Directive 97/23/EC 51Bibliography 52DIN EN 12953-6:2011-05 EN 12953-6:2011 (E) 3 Foreword This document (EN 12953-6:2011) has been prepared by Technical Committee CEN/TC 269 “Shell and water-tube boilers”, the secretariat of which is held by DIN. This European Standard shall be given the stat

20、us of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2011, and conflicting national standards shall be withdrawn at the latest by August 2011. Attention is drawn to the possibility that some of the elements of this document may be the subje

21、ct of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12953-6:2002. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports

22、 essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. Annex F provides details of significant technical changes between this European Standard and the previous edition. The European Standard EN 12953 c

23、oncerning shell boilers consists of the following parts: Part 1: General Part 2: Materials for pressure parts of boilers and accessories Part 3: Design and calculation for pressure parts Part 4: Workmanship and construction of pressure parts of the boiler Part 5: Inspection during construction, docu

24、mentation and marking of pressure parts of the boiler Part 6: Requirements for equipment for the boiler Part 7: Requirements for firing systems for liquid and gaseous fuels for the boiler Part 8: Requirements for safeguards against excessive pressure Part 9: Requirements for limiting devices of the

25、boiler and accessories Part 10: Requirements for boiler feedwater and boiler water quality Part 11: Acceptance tests Part 12: Requirements for firing systems for solid fuels for the boiler Part 13: Operating instructions CR 12953-14: Guidelines for the involvement of an inspection body independent o

26、f the manufacturer. DIN EN 12953-6:2011-05 EN 12953-6:2011 (E) 4 Although these parts can be obtained separately, it should be recognized that the parts are inter-dependent. As such, the design and manufacture of shell boilers requires the application of more than one part in order for the requireme

27、nts of the standard to be satisfactorily fulfilled. For any questions arising when using these standards the Boiler Helpdesk of CEN/TC 269 may be contacted: http:/www.boiler-helpdesk.din.de According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following count

28、ries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slove

29、nia, Spain, Sweden, Switzerland and United Kingdom. DIN EN 12953-6:2011-05 EN 12953-6:2011 (E) 5 1 Scope This part of this European Standard specifies the minimum requirements for safety related equipment for shell boilers as defined in EN 12953-1, to ensure the boiler operates within the allowable

30、limits (pressure, temperature, etc.) and if the limits are exceeded the energy supply shall be interrupted and locked out without manual (human) intervention at the boiler. NOTE 1 The maximum time of operation without manual (human) intervention should be defined for each boiler system. NOTE 2 Annex

31、 C (informative) gives recommendations of operation and testing of the boiler system with a maximum time of operation without manual (human) intervention of 72 hours. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated

32、references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12953-1:2002, Shell boilers Part 1: General EN 12953-2:2002, Shell boilers Part 2: Materials for pressure parts of boilers and accessories EN 12953

33、-7:2002, Shell boilers Part 7: Requirements for firing systems for liquid and gaseous fuels for the boilers EN 12953-8:2001, Shell boilers Part 8: Requirements for safeguards against excessive pressure EN 12953-9:2007, Shell boilers Part 9: Requirements for limiting devices of the boiler and accesso

34、ries EN 12953-10:2003, Shell boilers Part 10: Requirements for feedwater and boiler water quality EN 12953-12:2003, Shell boilers Part 12: Requirements for grate firing systems for solid fuels for the boiler EN 50156-1:2004, Electrical equipment for furnaces and ancillary equipment Part 1: Requireme

35、nts for application design and installation 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12953-1:2002 and the following apply. 3.1 controls devices used for maintaining the variable to be controlled (pressure, temperature, etc.) at a specific value

36、 (set point) 3.2 limiter limiting device that, on reaching a fixed value (pressure, temperature, etc.) is used to interrupt and lock-out the energy supply and requires manual unlocking before restart limiting device requires: measuring or detection function, and DIN EN 12953-6:2011-05 EN 12953-6:201

37、1 (E) 6 activation function for correction, or shutdown, or shutdown and lockout, and which is used to carry out safety related functions as defined in the Pressure Equipment Directive “PED“ 97/23/EC 1, either on its own or as part of a protective system (e.g. sensors, limiters, etc.) (see also Figu

38、re 1) NOTE 1 If this is achieved by multi channel systems, then all items or limiters for safety purposes are included within the protective system. NOTE 2 Manual resetting can be realised as a part of the limiter or as a part of the safety logic. This will be achieved by the responsible operator ta

39、king into account of the physical situation. Figure 1 Protective devices and safety accessories according to PED 97/23/EC 3.3 independent ability to function as required without dependence upon other equipment 3.4 lock-out safety shut-down condition of the protective system, such that a restart can

40、only be accomplished by a manual reset of the limiter or by a manual reset of the safety logic and by no other means 3.5 functional check testing of the safety device to ensure it performs its intended function 3.6 electrically heated steam boilers steam boilers in which water is heated by an electr

41、ic current flowing between electrodes or by immersion heaters 3.7 electrically heated hot water boilers hot water boilers in which water is heated by an electric current flowing between electrodes or by immersion heaters 3.8 expansion vessels containers to compensate for temperature dependent change

42、s in water volume closed expansion vessels are pressurised open expansion vessels are vented to atmospheric pressure and are not pressurised DIN EN 12953-6:2011-05 EN 12953-6:2011 (E) 7 3.9 allowable heat output maximum heat output (water mass flow times the difference between outlet and inlet entha

43、lpy) that can be generated during continuous operation and at which hot water boilers can be operated 3.10 allowable flow temperature highest temperature, measured at the outlet branch at which the hot water boiler can be operated (see 6.5.2.3) 3.11 maximum continuous rating (MCR) maximum continuous

44、 steam output that can be generated during continuous operation taking the specified steam condition into consideration 3.12 internal steam cushion steam filled space located within the steam boiler to accommodate changes in volume 3.13 external steam cushion steam filled space located outside the s

45、team boiler to accommodate changes in volume 3.14 gas cushion gas-filled space to accommodate changes in volume 3.15 effective heat transfer 3.15.1 for a hot water boiler, the heat supply is on and flow of water is greater than or equal to a specified minimum value 3.15.2 for a steam boiler, the hea

46、t supply is on, the start-up or steam valve is open and the temperature is greater than the saturation temperature at ambient pressure 3.16 normal operation automatic operation, with all regulating circuits and controls (open loops/closed loops) in automatic mode and with the set points and paramete

47、rs valid for normal operation NOTE Normal operation also includes the automatic switching on and off of the assigned actuators (e.g. burner). 3.17 normal shut down controlled switch off of the boiler either operated manually or automatically 3.18 make-up water water which compensates for losses of w

48、ater and steam from the system 3.19 feedwater mixture of returned condensate and/or make up water supplied to the boiler inlet DIN EN 12953-6:2011-05 EN 12953-6:2011 (E) 8 3.20 pressurization equipment external system for keeping the hot water system pressure within the required pressure limits NOTE In order to prevent corros