EN ISO 8497-1996 en Thermal Insulation - Determination of Steady-State Thermal Transmission Properties of Thermal Insulation for Circular Pipes《绝热 管道用绝热稳定状态中热传输性能测定 ISO 8497-1994》.pdf
《EN ISO 8497-1996 en Thermal Insulation - Determination of Steady-State Thermal Transmission Properties of Thermal Insulation for Circular Pipes《绝热 管道用绝热稳定状态中热传输性能测定 ISO 8497-1994》.pdf》由会员分享,可在线阅读,更多相关《EN ISO 8497-1996 en Thermal Insulation - Determination of Steady-State Thermal Transmission Properties of Thermal Insulation for Circular Pipes《绝热 管道用绝热稳定状态中热传输性能测定 ISO 8497-1994》.pdf(24页珍藏版)》请在麦多课文档分享上搜索。
1、 STD.BS1 BS EN IS0 B477-ENGL 1777 1b24bb 057832b 140 M BRITISH STANDARD Thermal insulation - De termination of steady-state thermal transmission properties of thermal insulation for circular pipes The European Standard EN IS0 8497 : 1996 has the status of a British standard ICs 27.220 BS EN IS0 8497
2、 : 1997 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD.BSI BS EN IS0 8977-ENGL 1777 LbZLibbS 0578327 U87 Amd. No. Date The following BSI references relate to the work on this standard: BS EN IS0 8497 : 1997 Text affected This British Standard, having been prepared under t
3、he direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 16 January 1997 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee RHE/Q, Thermal insulating mat
4、erials, upon which the foilowing bodies were represented Autoclaved Aerated Concrete Products Association Chartered Institution of Building Services Engineers Concrete Block Association Cork Industry Federation Cranfield University Department of Hdth Department of the Environment (Building bearch Es
5、tablishment) Department of Tiade and Industry (National Physical Laboratory) Electricity Association Eurisol (UK Mineral Wool Association) European Phenolic Foam Association Gypsum Products Development Association Power Generation Contsactors Association (PGCA (BEAMA Ltd.) Royal Institute of British
6、 Architects Thermal insMon Manufacturers and Suppliers Association (TMSA) Thermal InsMons Contractors Association The foilowing bodies were ais0 represented in the drafting of the standard, through subcommittees and panels Aggregaix Concrete Block Association Association of Lightweight Aggregate Man
7、ufaclmes British Ceramic Research Ltd. British Precast Concrete Federation Ltd Department of the Environment (British Board of Agrment) Flat Glass Manufacturers Association institute of Refrigeration institution of Chemical Engineers Insulation Jacket Manufacturers Federation Polyethylene Foam Insul
8、ation Association University of Salford O BSI 1997 Committee reference RHE/S Draft for comment 8W3462 DC I I ISBN O 080 26907 8 I I I I _ STD-BSI BS EN ISp8q97-ENGL 1997 Lb2Libb9 0578328 TL3 BS EN IS0 8497 : 1997 Contents page Committees responsible inside hnt cover National foreword ii Foreword 2 I
9、ntroduction 2 Method 1 2 3 4 6 6 7 8 9 10 11 12 13 Scope Normative references Dennitions Symbols and units Requirements General considerations Apparatus Test specimens Procedure End cap corrections calaons Test precision and accutcy 3 3 3 5 5 6 7 11 12 14 15 16 Test report 16 Annexes ZA (normative)
10、Nonnative references to intemational publications with their Figures A (ionnative) Bibliography 18 relevant European publications 20 1 Guardedandapparatus 7 2 Calibrated or calculated end apparatus 9 3 Nukiym correction 15 O BSI 1997 i STD.BS1 BS EN IS0 g97-NGL 1777 1b24bb9 0578329 95T I- BS EN IS0
11、8497 : 1997 National foreword This British Standard has been prepared by Technid Committee RHEB and is the Engiish ianguage version of EN IS0 8497 : 1996 l7zem.d insulation -Determination of steady-state thermal tmnsrnwn pmperth of themzal insulation for circular pipes published by the European Comm
12、ittee for Standardization (CEN). It is identical with IS0 8497 : 1994 published by the Intemational Organization for Standardization. IS0 8497 was produced as a result of international discussions in which the United Kingdom took an active paransmission properties of thermal insulation for circular
13、pipes (is0 8497 : 1994) isolation thermique - Dtermination des proprits relatives au transfert de chaleur en rgime stationnaire dans les isolants thenniques pour conduites (Is0 8497 : 1994) Wrmeschutz - Bestimmung der Wamietransporteigenschaftn im stationren Zustand von Wmedmmungen fr Rohrleitungen
14、(IS0 8497 : 1994) This European Standard was approved by CEN on 199511-11. CEN members are bound to comply with the CENCENELEC Internai Regulations which stipulate the conditions for giving this European standard the status of a national standard without any alteration. Uptodate lists and bibliograp
15、hicd references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN 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 CEN
16、 member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Gennany, Greece, Iceland, Ireland, Itay, Luxembourg, Netherlands, Norway, Portugal, Spain,
17、Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fur Normung Central Secretariat: rue de Stassart 36, B-1060 Brussels O 1996 Copyright reserved to CEN members Ref. No. EN IS0 8497 : 1996 E STD-BSI BS EN IS0 8477-ENG
18、L 1777 m 3b24bb7 0578333 508 m Page 2 EN IS0 8497 : 1996 Foreword The text of the international Standard from Technical Committee ISOK 163, Thermal insulation, of the internationai Organization for Standarwion USO) has been taken over as a European Standard by Technical Committee CENK 89, Thermai pe
19、rformance of buildings components, the secretariat of which is held by SIS. This European standard shail be given the status of a national standard, either by publicaion of an identical text or by endorsement, at the latest by February 1997, and conflicting national standards shaU be withcrawn at th
20、e latest by February 1997. According to the CENCENELEC Internal Reguiations, the nationai stasidards organizations of the following countries are bound to implement this European Standard: Ausha, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Itaiy, Luxembourg, Netherlands, No
21、rway, Portugal, Spain, Sweden, Swilzerland and the United Kingdom. NOTE. Normative references to international Standards are iisted in annex ZA (normative). Introduction The thermal transmission properties of pipe insulation generally have to be determined using pipe test apparatus rather than flat
22、specimen apparatus such as the guarded hot plate or the heat flow meter apparatus, if results are to be representative of end-use performance. Insulation materiai formed into flat sheets often has different internal geometzy from that of the same material formed into cylindrical shapes. Furthennore,
23、 properties often depend significantly upon the direction of heat flow in relation to inherent characteristics such as fibre planes or elongated cells: thus flat specimen onedimensional heat flow measurements may not necessarily be representaiive of the two-dimensional raid heat flow encountered in
24、pipe insulation. Another consideration is that commercial insulations for pipes are often made with the inside diameter slightly iarger than the outside diameter of the pipe, otherwise manufacturing tolerances may result in an imperfect fit on the pipe, thus creating an air gap of variable thickness
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