1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationAerospace series Pipelines for liquids and gases DefinitionsBS EN 2245:2012National forewordThis British Standard is the UK implementation of EN 2245:2012. BSI, as a member of CE
2、N, is obliged to publish EN 2245:2012 as a British Standard. However, attention is drawn to the fact that at the Formal Vote stage, the UK committee abstained from voting.ACE/069 has responsibility for the subject matter of this standard and considers the content of EN 2245:2012 to be inadequate and
3、 outdated. In addition, the content conflicts with existing ISO standards such as ISO 6771:2007 and ISO 11639:2010.The UK participation in its preparation was entrusted to Technical Committee ACE/69, Aerospace hydraulic systems, fluids and components. A list of organizations represented on this comm
4、ittee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012 ISBN 978 0 580 75713 6 ICS 49.08
5、0Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 2245:2012EUROP
6、EAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2245 March 2012 ICS 49.080 English Version Aerospace series - Pipelines for liquids and gases - Definitions Srie arospatiale - Canalisations pour liquides et gaz - Dfinitions Luft- und Raumfahrt - Leitungen fr Flssigkeiten und Gase - Begriffe This Euro
7、pean Standard was approved by CEN on 24 September 2011. CEN 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
8、 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 official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN memb
9、er 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 of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
10、 Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Av
11、enue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2245:2012: EBS EN 2245:2012EN 2245:2012 (E) 2 Contents Page Foreword 31 Scope and field of application 42 Normative references 43 Symbols and abbr
12、eviations 44 Nominal size .44.1 Rigid tubes .44.2 Flexible hoses 44.3 Range of nominal sizes of pipelines 45 Pressure terms .55.1 Nominal pressure PN.55.2 Proof pressure PE55.3 Minimum burst pressure PR.55.4 Impulse, Peak pressure PP.56 Pressure classes57 Types and temperature range of non-metallic
13、flexible hose assemblies 6Bibliography 7BS EN 2245:2012EN 2245:2012 (E) 3 Foreword This document (EN 2245:2012) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Ass
14、ociation, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorse
15、ment, at the latest by September 2012, and conflicting national standards shall be withdrawn at the latest by September 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for ide
16、ntifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Ge
17、rmany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 2245:2012EN 2245:2012 (E) 4 1 Scope and field of application This European Stand
18、ard specifies the nominal sizes, pressure terms and pressure classes concerning pipelines and types and temperature range of flexible non-metallic hose assemblies used on board aircraft to convey liquids and gases as well as for the transmission of forces. 2 Normative references This document contai
19、ns no normative references. 3 Symbols and abbreviations DN= Nominal size PN= Nominal pressure PE= Proof pressure PR= Minimum burst pressure PP= Peak pressure 4 Nominal size The nominal size shall be a characteristic figure without dimension. It describes all components forming part of a pipeline sys
20、tem. 4.1 Rigid tubes The nominal size of a rigid tube used in a pipeline corresponds to its outer diameter. 4.2 Flexible hoses The nominal size of a flexible hose used in a flexible hose assembly corresponds to the outer diameter of a rigid tube, such that the inside diameters of the flexible hose a
21、nd the rigid tube are approximately the same. 4.3 Range of nominal sizes of pipelines Table 1 Nominal size 3 4 5 6 8 10 12 16 20 25 32 40 50 63 80 US number a2 3 4 5 6 8 10 12 16 20 24 32 40 48 aThis number is the outside diameter of the comparable corresponding rigid tube expressed in 1/16 inch. BS
22、 EN 2245:2012EN 2245:2012 (E) 5 5 Pressure terms 5.1 Nominal pressure PNThe nominal pressure of pipelines corresponds to the maximum steady pressure to which the pipeline may be subjected. A normal atmosphere (specified in ISO 471) being given. 5.2 Proof pressure PEProof pressure shall be a pressure
23、 for test purposes of which the level shall be a given multiple of the nominal pressure and to which the pipeline may be subjected for a given time without any evidence of leakage, permanent deformation or other damage becoming apparent. 5.3 Minimum burst pressure PRMinimum burst pressure correspond
24、s to the minimum pressure which the pipeline shall withstand before its final damage due to fracture, bursting, blow-off of an end fitting, etc. 5.4 Impulse, Peak pressure PPThe impulse shall be a transient pressure increase with a characteristic curve produced during the impulse test of which the p
25、eak point shall be called peak pressure. 6 Pressure classes The pipelines are divided into pressure classes according to table 2. Table 2 Classes Nominal Pressure aI 0 PN 2 MPa (20 bar) II 2 PN 7 MPa (70 bar) III PN= 10,5 MPa (105 bar) IV PN= 21 MPa (210 bar) V PN= 28 MPa (280 bar) a1 bar = 105pasca
26、l. BS EN 2245:2012EN 2245:2012 (E) 6 7 Types and temperature range of non-metallic flexible hose assemblies Non-metallic flexible hose assemblies are classified into types corresponding to the various ranges of operating temperature on board aircraft, according to table 3. Table 3 Types 1 2 3 a4 bTe
27、mperature range in C 50 to +70 55 to +135 55 to +230 55 to +200 aType 3 is reserved for pressure classes I, II and III. bType 4 is reserved for pressure classes IV and V. BS EN 2245:2012EN 2245:2012 (E) 7 Bibliography ISO 471, Rubber Temperatures, humidities and times for conditioning and testing. B
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