1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsWB9423_BSI_StandardColCov_noK_AW:BSI FRONT COVERS 5/9/08 12:55 Page 1Power transformer and reactor fittings Part 9: Oil-to-water heat exchangersBS EN 50216-9:2009National forewordThi
2、s British Standard is the UK implementation of EN 50216-9:2009.The UK participation in its preparation was entrusted to Technical CommitteePEL/14, Power transformers.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to
3、include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2009ISBN 978 0 580 54738 6ICS 27.060.30; 29.180Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the Stan
4、dardsPolicy and Strategy Committee on 31 October 2009Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 50216-9:2009EUROPEAN STANDARD EN 50216-9 NORME EUROPENNE EUROPISCHE NORM March 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen d
5、e Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50216-9:2009 E ICS 29.180 English vers
6、ion Power transformer and reactor fittings - Part 9: Oil-to-water heat exchangers Accessoires pour transformateurs de puissance et bobines dinductance - Partie 9: Echangeurs thermiques huile-eauZubehr fr Transformatoren und Drosselspulen - Teil 9: l-Wasser-Khler This European Standard was approved b
7、y CENELEC on 2008-10-21. CENELEC 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 alteration. Up-to-date lists and bibliographical references concerning such national s
8、tandards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and
9、notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lith
10、uania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 50216-9:2009EN 50216-9:2009 2 Foreword This European Standard was prepared by the Technical Committee CENELEC TC 14, Power transformers. The text
11、 of the draft was submitted to the formal vote and was approved by CENELEC as EN 50216-9 on 2008-10-21. This European Standard is to be read in conjunction with EN 50216-1:2002, Power transformer and reactor fittings - Part 1: General. The following dates were fixed: latest date by which the EN has
12、to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-11-01 _ BS EN 50216-9:2009 3 EN 50216-9:2009 Contents 1 Scope . 4 2 Normative re
13、ferences . 4 3 Definitions . 4 4 Requirements 5 4.1 Rated values . 5 4.2 Rated cooling capacity 6 4.3 Mechanical design 6 4.4 Corrosion protection . 7 5 Designation . 7 5.1 Designation of the heat exchangers . 7 5.2 Rating plate information 7 6 Tests . 8 6.1 Routine tests . 8 6.2 Type tests . 9 7 Pr
14、eparation for transport and storage 9 8 Mounting and service, service conditions . 9 Annex A (normative) Details to the heat exchangers 10 Annex B (normative) Rating conditions of the heat exchangers . 17 Annex C (informative) Example for calculation of capacity in service 23 Bibliography 24 Figures
15、 Figure A.1 Collection and forms of suspensory types . 11 Figure A.2 Collection and forms of horizontal types 12 Figure A.3 Collection and forms of vertical standing types 13 Figure B.1 Capacity factor depending on inlet temperatures of oil and water . 19 Figure B.2 Capacity factor depending on mass
16、 for plain tubes . 20 Figure B.3 Capacity factor depending on mass for finned tubes . 21 Tables Table A.1 Devices 14 Table A.2 Examples for material selection depending on water quality . 16 Table A.3 Average values for chemically neutral water (fresh water) 16 BS EN 50216-9:2009EN 50216-9:2009 4 1
17、Scope EN 50216-9 deals with oil-to-water heat exchangers that means a heat exchanger for the cooling of the transformer oil using a forced oil circuit and a forced water circuit. The oil-side of the oil-to-water heat exchangers is not included in the scope of the Pressure Equipment Directive 97/23/E
18、C according to Article 1, 3.12. The water-side falls into Article 3, 3 of the Pressure Equipment Directive, therefore the rating plate must not contain a CE sign according to Article 15 of the Pressure Equipment Directive. This standard establishes essential dimensions and the requirements to ensure
19、 interchangeability and adequate mounting of the oil-to-water heat exchangers. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the ref
20、erenced document (including any amendment) applies. EN 50216-1:2002 Power transformers and reactor fittings - Part 1: General EN 60296 Fluids for electrotechnical applications - Unused mineral insulating oils for transformers and switchgear (IEC 60296) EN 60721-3-4 Classification of environmental co
21、nditions - Part 3: Classification of groups of environmental parameters and their severities - Section 4: Stationary use at non-weatherprotected locations (IEC 60721-3-4) EN 1092-1 Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories , PN designated - Part 1: Steel
22、 flanges EN 1561 Founding - Grey cast irons EN 1653 Copper and copper alloys - Plate, sheet and circles for boilers, pressure vessels and hot water storage units EN 10025:1990 1)Hot rolled products of non-alloy structural steels - Technical delivery conditions EN 10027-2 Designation systems for stee
23、ls - Part 2: Numerical system EN 10088-2 Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes EN 10130 Cold rolled low carbon steel flat products for cold forming - Technical delivery conditions EN 12451 Copper and copp
24、er alloys - Seamless, round tubes for heat exchangers EN 12452 Copper and copper alloys - Rolled, finned, seamless tubes for heat exchangers EN 12502-1 Protection of metallic materials against corrosion - Guidance on the assessment of corrosion likelihood in water distribution and storage systems -
25、Part 1: General EN ISO 3506-1 Mechanical properties of corrosion-resistant stainless steel fasteners - Part 1: Bolts, screws and studs (ISO 3506-1) ISO 4406 Hydraulic fluid power - Fluids - Methods for coding the level of contamination by solid particles 1)Replaced by EN 10025 series, Hot rolled pro
26、ducts of structural steels. BS EN 50216-9:2009 5 EN 50216-9:2009 3 Definitions For the purposes of this document, the following terms and definitions apply. 3.1 single tube tube conducting the water in the oil filled compartment, either plain tubes which have the inner water side and the outer oil s
27、ide with plain surface or finned tubes which have the outer oil side finned for increasing the heat transfer area from oil to tube 3.2 double tube consists of two telescope tubes without blocking fluid. The inner water side of the inside tube is a plain tube. The outer oil side of the outside tube i
28、s either a plain tube or a finned tube. The inner side of the outside tube or the outer side of the inside tube has regularly groves for the leakage detection 3.3 tube bundle number of parallel tubes to get the adequate heat transfer surface and the appropriate plates 3.4 single tube arrangement the
29、 heat exchange from oil to water is conducted with a bundle of single tubes. For safety reasons of the transformer the oil pressure outside the tubes must always have a higher value than the water pressure inside the tubes, so that even in the case of heat exchanger untightness no water penetrates i
30、nto the transformer oil 3.5 double tube arrangement the heat exchange from oil to water is conducted with a bundle of double tubes. The double tube system has sufficient security for the transformer. The oil pressure outside the tubes may be less than the water pressure inside the tubes 3.6 tube pla
31、te the cooling tubes are rolled or welded oil-tight and/or water tight on both ends into the plates - for double tubes one end into two plates, for single tubes into one plate. With the tube plates the oil side is tightened against the water side 3.7 water channel the water side of the heat exchange
32、r is connected via the water channels 3.8 leakage detection due to a leakage oil or water in the space between the double tubes would be detected 4 Requirements 4.1 Rated values Values for inquiry (minimum): - single tube / double tube heat exchanger - water quality (see A.6) - rated cooling capacit
33、y QrkW - water temperature at inlet t1 C- water temperature at outlet (max.) t1 C - average oil temperature t2mC - oil temperature difference (min. value/max. value) t2K - water flow quantity (max.) V1m/h - max. operating pressure (water side) p1kPaBS EN 50216-9:2009EN 50216-9:2009 6 For an order th
34、e following rated values should be fixed: - single tube / double tube heat exchanger - materials - rated cooling capacity QrkW - rated water flow quantity V1m/h- rated oil flow quantity V2m/h - water temperature at inlet t1 C- water temperature at outlet t1 C - oil temperature at inlet t2 C- oil tem
35、perature at outlet t2 C - water side pressure drop p1kPa- oil side pressure drop p2kPa - max. operating pressure (water side) p1kPa- max. operating pressure (oil side) p2kPa 4.2 Rated cooling capacity The rated cooling capacity of the heat exchanger is the minimum capacity, which the manufacturer ha
36、s to guarantee. For a heat exchanger in new condition the value is based on the following: - rated water and oil flow quantities in connection with the particular permitted static pressure drops; - oil-to-water heat exchangers must be designed with a capacity margin of min. 25 %. For new heat exchan
37、gers the capacity with the margin has to be achieved with the rated values for oil flow quantity, water flow quantity, oil temperature at inlet and water temperature at inlet. 4.3 Mechanical design The mechanical design is based on the ambient conditions according to EN 50216-1, Clause 3, and on a m
38、aximum oil temperature of 100 C and a maximum water temperature of 50 C. Deviating temperatures and ambient conditions as well as other insulating fluids must be agreed between manufacturer and purchaser. The cooling tubes and plates are oil tight and water tight connected. The tube bundle could exp
39、ect the following execution (execution be agreed between manufacturer and purchaser): - one side with floating head cover, the bundle can be pulled out; - fixed tube plate and stationary heads. The water channels are removable and can separately be emptied. Removing of a water channel must not influ
40、ence the oil circuit. On the oil-side the heat exchanger must be vacuum proof. The heat exchanger has to be designed for unprotected outdoor installation. The heat exchanger must be completely drainable and ventable on the oil side and on the water side. For material selection criteria refer to A.6.
41、 The maximum permissible oil pressure in service for the heat exchanger is limited to 350 kPa. The maximum permissible water pressure in service for heat exchanger with single tubes is limited to 340 kPa. The maximum permissible water pressure in service for heat exchanger with double tubes is limit
42、ed to 800 kPa 2). 2)For higher water pressure in service, design and test values must be enlarged adequate and the rules of PED 97/23/EC must be followed. BS EN 50216-9:2009 7 EN 50216-9:2009 4.4 Corrosion protection Common screws and nuts: Stainless steel according to EN ISO 3506-1. 4.4.1 Inner sur
43、face water side (standard) Water channels are protected with epoxy coating. Thickness minimum 150 m or according to special agreement. Several selections are given in Table A.2. 4.4.2 Inner surface oil side (standard) Oil resistant protection, minimum resistant for 100 C3)temperature. 4.4.3 Outer su
44、rface Corrosion protection and coating must be agreed between manufacturer and purchaser. The required environmental conditions must be followed. The severities of the environmental conditions are classified in EN 60721-3-4. 5 Designation 5.1 Designation of the heat exchangers The following oil-to-w
45、ater heat exchangers are differentiated: - single tube arrangements Type OWSA oil-water heat exchanger with single tubes, vertical suspensory type Type OWSB oil-water heat exchanger with single tubes, horizontal type Type OWSC oil-water heat exchanger with single tubes, vertical standing type - doub
46、le tube arrangements Type OWDA oil-water heat exchanger with double tubes, vertical suspensory type Type OWDB oil-water heat exchanger with double tubes, horizontal type Type OWDC oil-water heat exchanger with double tubes, vertical standing type EXAMPLE for designation: oil-water heat exchangers wi
47、th double tubes, vertical standing type (OWDC), rated capacity 250 kW (250), top oil temperature rise 43 K (43), form D, Heat exchanger EN 50216-9OWDC250/43D 5.2 Rating plate information The rating plate must have the following information and has to be attached clearly readable on the assembled hea
48、t exchangers: - sign or name of supplier; - designation according to EN 50216-9, 5.1; - serial number; - manufacturing year. 3)Deviations in the temperature must be agreed between manufacturer and purchaser. BS EN 50216-9:2009EN 50216-9:2009 8 Rated values: - rated capacity in kW; - rated oil- and w
49、ater-flow quantity in m/h; - min./max. operating water flow quantity in m/h; - inlet and outlet temperatures oil-side and water-side in C; - pressure drop in the heat exchanger oil side/water side in bar; - max. pressure in service for oil-side in kPa; - max. pressure in service for water-side in kPa; - max. design temperature for oil-side in C; - min. ambient temperature (water-side completely empty) in C; - mass of heat exchanger without oil and water in kg; - oil a
